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  • 1.
    Böhnke, Tobias
    et al.
    Uppsala University, Disciplinary Domain of Science and Technology, Technology, Department of Engineering Sciences, Division for Electricity and Lightning Research.
    Kratz, Henrik
    Uppsala University, Disciplinary Domain of Science and Technology, Technology, Department of Engineering Sciences, Micro Structural Technology.
    Hultåker, Annette
    Uppsala University, Disciplinary Domain of Science and Technology, Technology, Department of Engineering Sciences, Solid State Physics.
    Köhler, Johan
    Uppsala University, Disciplinary Domain of Science and Technology, Technology, Department of Engineering Sciences, Division for Electricity and Lightning Research.
    Edoff, Marika
    Uppsala University, Disciplinary Domain of Science and Technology, Technology, Department of Engineering Sciences, Solid State Electronics.
    Roos, Arne
    Uppsala University, Disciplinary Domain of Science and Technology, Technology, Department of Engineering Sciences, Solid State Physics.
    Ribbing, Carl-Gustaf
    Uppsala University, Disciplinary Domain of Science and Technology, Technology, Department of Engineering Sciences, Solid State Physics.
    Thornell, Greger
    Uppsala University, Disciplinary Domain of Science and Technology, Technology, Department of Engineering Sciences, Micro Structural Technology.
    Surfaces with high solar reflectance and high thermal emittance on structured silicon for spacecraft thermal control2008In: Optical materials (Amsterdam), ISSN 0925-3467, E-ISSN 1873-1252, Vol. 30, no 9, p. 1410-1421Article in journal (Refereed)
    Abstract [en]

    Presented here is an examination of unstructured and structured (by anisotropic etching), monocrystalline silicon wafers coated with sputter deposited aluminum and chemical vapor deposited silicon dioxide for high solar reflectance and high thermal emittance, respectively. The topography of the samples was characterized with optical and scanning electron microscopy. Optical properties were examined with reflectance and transmittance spectroscopy, partly by usage of an integrating sphere. The measurement results were used to estimate the equilibrium temperature of the surfaces in space. The suitability of the surfaces with high solar reflectance and high thermal emittance to aid in the thermal control of miniaturized, highly integrated components for space applications is discussed. A silicon dioxide layer on a metal layer results in a slightly lower reflectance when compared to surfaces with only a metal layer, but might be beneficial for miniaturized space components and modules that have to dissipate internally generated heat into open space. Additionally, it is an advantage to microstructure the emitting surface for enhanced radiation of excess heat.

  • 2. Fredenberg, E
    et al.
    Cederström, B
    Åslund, M
    Ribbing, Carolina
    Uppsala University, Disciplinary Domain of Science and Technology, Technology, Department of Engineering Sciences, Solid State Electronics.
    Danielsson, M
    A tunable energy filter for medical x-ray imaging2008In: X-Ray Optics and Instrumentation, ISSN 1687-7640, p. 635024-Article in journal (Refereed)
  • 3.
    Granqvist, Claes-Göran
    et al.
    Uppsala University, Disciplinary Domain of Science and Technology, Technology, Department of Materials Science.
    Azens, A
    Uppsala University, Disciplinary Domain of Science and Technology, Technology, Department of Materials Science.
    Isidorsson, Jan
    Uppsala University, Disciplinary Domain of Science and Technology, Technology, Department of Materials Science.
    Kharrazi, M
    Uppsala University, Disciplinary Domain of Science and Technology, Technology, Department of Materials Science.
    Kullman, Lisen
    Uppsala University, Disciplinary Domain of Science and Technology, Technology, Department of Materials Science.
    Lindström, T
    Uppsala University, Disciplinary Domain of Science and Technology, Technology, Department of Materials Science.
    Niklasson, Gunnar A.
    Uppsala University, Disciplinary Domain of Science and Technology, Technology, Department of Materials Science.
    Ribbing, Carl-Gustaf
    Uppsala University, Disciplinary Domain of Science and Technology, Technology, Department of Materials Science.
    Rönnow, D
    Uppsala University, Disciplinary Domain of Science and Technology, Technology, Department of Materials Science.
    Strömme, Maria
    Uppsala University, Disciplinary Domain of Science and Technology, Technology, Department of Materials Science.
    Veszelei, M
    Uppsala University, Disciplinary Domain of Science and Technology, Technology, Department of Materials Science.
    Towards the smart window: progress in electrochromics1997In: Journal of Non-Crystalline Solids, ISSN 0022-3093, E-ISSN 1873-4812, Vol. 218, p. 273-279Article in journal (Refereed)
    Abstract [en]

    Electrochromic devices have the ability to produce reversible and persistent changes of their optical properties. The phenomenon is associated with joint ion and electron transport into/out of an electrochromic thin film, in most cases being a transition metal oxide. This paper outlines the various applications of such devices in smart windows suitable for energy-conscious architecture, in variable-reflectance mirrors, and in display devices. Critical materials issues and design concepts are discussed. The paper also covers two specific research topics: computed electronic structure of crystalline WO3 incorporating ionic species, showing how reflectance modulation emerges from a first-principles calculation; and Li+ dynamics in heavily disordered Ti oxide, illustrating how diffusion constants derived from impedance spectroscopy can be reconciled with the Anderson—Stuart model.

  • 4.
    Högström, H
    et al.
    Uppsala University, Teknisk-naturvetenskapliga vetenskapsområdet, Technology, Department of Engineering Sciences. Uppsala University, Teknisk-naturvetenskapliga vetenskapsområdet, Technology, Department of Engineering Sciences, Solid State Physics. Fasta tillståndets fysik.
    Forsell, G
    Ribbing, C G
    Uppsala University, Teknisk-naturvetenskapliga vetenskapsområdet, Technology, Department of Engineering Sciences. Uppsala University, Teknisk-naturvetenskapliga vetenskapsområdet, Technology, Department of Engineering Sciences, Solid State Physics. Fasta tillståndets fysik.
    Realization of selective low emittance in both thermal atmospheric windows2005In: Opt. Eng., Vol. 44(2), p. 026001-1Article in journal (Refereed)
  • 5.
    Högström, H
    et al.
    Uppsala University, Teknisk-naturvetenskapliga vetenskapsområdet, Technology, Department of Engineering Sciences. Fasta tillståndets fysik.
    Ribbing, C G
    Uppsala University, Teknisk-naturvetenskapliga vetenskapsområdet, Technology, Department of Engineering Sciences. Fasta tillståndets fysik.
    A three-dimensional photonic crystal with a polaritonic gap2005In: Int. Symp. Phot. and EM Crystal Structures, 2005, p. 245-Conference paper (Other scientific)
  • 6.
    Högström, H
    et al.
    Uppsala University, Teknisk-naturvetenskapliga vetenskapsområdet, Technology, Department of Engineering Sciences. Uppsala University, Teknisk-naturvetenskapliga vetenskapsområdet, Physics, Department of Physics and Materials Science, Experimental Physics. Technology, Department of Engineering Sciences, Solid State Physics. Fasta tillståndets fysik.
    Valizadeh, S
    Uppsala University, Teknisk-naturvetenskapliga vetenskapsområdet, Technology, Department of Engineering Sciences. Uppsala University, Teknisk-naturvetenskapliga vetenskapsområdet, Physics, Department of Physics and Materials Science, Experimental Physics. Technology, Department of Engineering Sciences, Solid State Physics.
    Garcia-Vidal, F J
    Martin-Moreno, L
    Ribbing, C G
    Uppsala University, Teknisk-naturvetenskapliga vetenskapsområdet, Technology, Department of Engineering Sciences. Uppsala University, Teknisk-naturvetenskapliga vetenskapsområdet, Physics, Department of Physics and Materials Science, Experimental Physics. Technology, Department of Engineering Sciences, Solid State Physics. Fasta tillståndets fysik.
    Extraordinary Optical Transmittance through SIC – Ion Beam Processing for Surface Plasmonics2005In: Materials Research Society Fall Meeting, 2005, p. GG2.6-Conference paper (Refereed)
  • 7.
    Högström, Herman
    et al.
    Uppsala University, Disciplinary Domain of Science and Technology, Technology, Department of Engineering Sciences, Solid State Physics.
    Ribbing, Carl G.
    Uppsala University, Disciplinary Domain of Science and Technology, Technology, Department of Engineering Sciences, Solid State Physics.
    Experimental Observation of Photonic and Polaritonic Gaps in a Silica Opal2006In: Applied Optics, ISSN 1559-128X, E-ISSN 2155-3165, Vol. 45, no 29, p. 7617-7621Article in journal (Refereed)
  • 8.
    Högström, Herman
    et al.
    Uppsala University, Disciplinary Domain of Science and Technology, Technology, Department of Engineering Sciences, Solid State Physics.
    Ribbing, Carl Gustaf
    Uppsala University, Disciplinary Domain of Science and Technology, Technology, Department of Engineering Sciences, Solid State Physics.
    On the angular dependence of gaps in 1-D Si/SiO2 periodic structures2007In: Optics Communications, ISSN 0030-4018, E-ISSN 1873-0310, Vol. 271, no 1, p. 148-153Article in journal (Refereed)
    Abstract [en]

    A multilayer of silicon and silicon dioxide was used to study the angular dependence of reflectance maxima originating from interference and bulk optical properties. Silicon dioxide has a lattice resonance in the infrared causing an interval of high reflectance for wavelengths around 9 μm. The multilayer was designed such that the interference maxima do not overlap/interact with the material related reflectance maximum. In this way the different angular behavior for the two types of reflectance maxima can be studied simultaneously. Experimental and calculated reflectance spectra for s- and p-polarized light for angles of incidence between 0° and 90° collected for every 5° are presented. The reflectance features caused by interference generally move to shorter wavelengths with increasing angle of incidence, and the materials related peak is widened for (s-polarized light) and excitation of the longitudinal modes was observed for p-polarized light.

  • 9.
    Högström, Herman
    et al.
    Uppsala University, Teknisk-naturvetenskapliga vetenskapsområdet, Technology, Department of Engineering Sciences. Uppsala University, Teknisk-naturvetenskapliga vetenskapsområdet, Technology, Department of Engineering Sciences, Solid State Physics. Fasta tillståndets fysik.
    Ribbing, Carl-Gustaf
    Uppsala University, Teknisk-naturvetenskapliga vetenskapsområdet, Technology, Department of Engineering Sciences. Uppsala University, Teknisk-naturvetenskapliga vetenskapsområdet, Technology, Department of Engineering Sciences, Solid State Physics. Fasta tillståndets fysik.
    Polaritonic and Photonic gaps in SiO2/Si and SiO2/air periodic structures2004In: Phys. Rev. Lett., Vol. 92, p. 123901-Article in journal (Refereed)
  • 10.
    Högström, Herman
    et al.
    Uppsala University, Disciplinary Domain of Science and Technology, Technology, Department of Engineering Sciences, Solid State Physics.
    Valizadeh, Sima
    Uppsala University, Disciplinary Domain of Science and Technology, Technology, Department of Engineering Sciences, Solid State Physics.
    Ribbing, Carl Gustaf
    Uppsala University, Disciplinary Domain of Science and Technology, Technology, Department of Engineering Sciences, Solid State Physics.
    Optical Excitation of Surface Phonon Polaritons in Silicon Carbide by a Hole Array Fabricated by a Focused Ion Beam2007In: Optical materials (Amsterdam), ISSN 0925-3467, E-ISSN 1873-1252, Vol. 30, no 2, p. 328-333Article in journal (Refereed)
    Abstract [en]

    Silicon carbide (SiC) is a polar material with a lattice resonance in the thermal infrared causing a wavelength interval with a negative dielectric function. Within this interval SiC can support surface waves. To excite surface waves, i.e., surface phonon polaritons (SPP), the sample has to be structured with a periodic micro-pattern. The possibilities of using a focused ion beam (FIB) for microfabrication of periodic microstructures in silicon carbide (SiC) is investigated. We present optimized parameters for the microfabrication of SiC with a FIB, as well as calculated and experimental optical results confirming the sensitive optical properties of the material required for the surface excitation are not destroyed by the preparation process.

  • 11. högström, Herman
    et al.
    valizadeh, sima
    vidal, f.j.garcia
    Dept. de Fisica Teorica de la Materia Condensada.
    moreno, l.martin
    Dept. de Fisica de la Materia Condensada, ICA-CSIC,.
    ribbing, Carl-Gustaf
    Uppsala University.
    Extraordinary Optical Transmittance through SiC –Ion Beam Processing for Surface Plasmonics,2005In: MRS Fall Meeting, 2005Conference paper (Refereed)
  • 12.
    Lansåker, Pia
    et al.
    Uppsala University, Disciplinary Domain of Science and Technology, Technology, Department of Engineering Sciences, Solid State Physics.
    Ribbing, Carl-Gustaf
    Uppsala University, Disciplinary Domain of Science and Technology, Technology, Department of Engineering Sciences, Solid State Physics.
    Niklasson, Gunnar A.
    Uppsala University, Disciplinary Domain of Science and Technology, Technology, Department of Engineering Sciences, Solid State Physics.
    Granqvist, Claes-Göran
    Uppsala University, Disciplinary Domain of Science and Technology, Technology, Department of Engineering Sciences, Solid State Physics.
    Temperature effect on gold nanoparticle growth and plasmonic properties.2013In: Optics and Photonics in Sweden, Uppsala Oct. 22-23, 2013: Poster abstracts, PhotonicSweden , 2013, p. 1 p-Conference paper (Other academic)
    Abstract [en]

    The plasmonic properties of gold nanoparticles (NPs) have very promising prospects to enhance theefficiency in several branches of science and technology, such as in environmental, energy, biomedicaland information technology. The plasmonic properties are strongly related to the shape, size anddistribution of the NPs and to their surrounding media. Therefore, suitable techniques for optimizedNP manufacturing, as well as improved understanding of the optical characteristics of the NPs, arenecessary for progress.In this work, gold was deposited on heated substrates using DC magnetron sputtering, which is amethod with great reproducibility and suitability for large area coatings. The method is also simple touse and gives NPs at considerably lower temperatures than other heat treating manufacturingtechniques. The depositions were performed at three different substrate temperatures, and a series ofgold NP samples were manufactured at each temperature. The localized surface plasmon resonance ofthe NPs was investigated by optical measurements, and the results were related to the shape, size anddistribution of the NPs, as observed from scanning electron microscopy and image analysis. Basic physics regarding plasmonics and metal NP growth processes are also presented.The optical results show effects of particle-particle interaction, aspect ratio and size of the NPs,which are in full agreement with results on NP structure and distribution.

  • 13.
    Ribbing, C G
    et al.
    Uppsala University, Teknisk-naturvetenskapliga vetenskapsområdet, Technology, Department of Engineering Sciences. Uppsala University, Teknisk-naturvetenskapliga vetenskapsområdet, Technology, Department of Engineering Sciences, Solid State Physics. Fasta tillståndets fysik.
    Högström, H
    Uppsala University, Teknisk-naturvetenskapliga vetenskapsområdet, Technology, Department of Engineering Sciences. Uppsala University, Teknisk-naturvetenskapliga vetenskapsområdet, Technology, Department of Engineering Sciences, Solid State Physics. Fasta tillståndets fysik.
    Rung, A
    Uppsala University, Teknisk-naturvetenskapliga vetenskapsområdet, Technology, Department of Engineering Sciences. Uppsala University, Teknisk-naturvetenskapliga vetenskapsområdet, Technology, Department of Engineering Sciences, Solid State Physics. Fasta tillståndets fysik.
    Interaction between Photonic Gaps and Lattice Excitations in 1-3 Dimensions2005In: Deutsche Forschungsgemeinschaft, Annual meeting: Berlin, March 7-8, 2005, p. HL-42.5.Conference paper (Other scientific)
  • 14.
    Ribbing, C G
    et al.
    Uppsala University, Disciplinary Domain of Science and Technology, Technology, Department of Engineering Sciences, Solid State Physics. Fasta tillståndets fysik.
    Högström, Herman
    Uppsala University, Disciplinary Domain of Science and Technology, Technology, Department of Engineering Sciences, Solid State Physics. Fasta tillståndets fysik.
    Rung, Andreas
    Uppsala University, Disciplinary Domain of Science and Technology, Technology, Department of Engineering Sciences, Solid State Physics. Fasta tillståndets fysik.
    Studies of polaritonic gaps in photonic crystals2006In: Appl. Opt., no 45:7, p. 1575-82Article in journal (Refereed)
  • 15.
    Ribbing, Carl-Gustaf
    Uppsala University, Disciplinary Domain of Science and Technology, Technology, Department of Engineering Sciences, Solid State Physics.
    Longitude Prize now an objective decision2014In: Nature, ISSN 0028-0836, E-ISSN 1476-4687, Vol. 511, no 7507, p. 31-31Article in journal (Refereed)
  • 16.
    Ribbing, Carl-Gustaf
    et al.
    Uppsala University, Teknisk-naturvetenskapliga vetenskapsområdet, Technology, Department of Engineering Sciences. Uppsala University, Teknisk-naturvetenskapliga vetenskapsområdet, Technology, Department of Engineering Sciences, Solid State Physics. Fasta tillståndets fysik.
    Högström, Herman
    Uppsala University, Teknisk-naturvetenskapliga vetenskapsområdet, Technology, Department of Engineering Sciences. Uppsala University, Teknisk-naturvetenskapliga vetenskapsområdet, Technology, Department of Engineering Sciences, Solid State Physics. Fasta tillståndets fysik.
    Rung, Andreas
    Uppsala University, Teknisk-naturvetenskapliga vetenskapsområdet, Technology, Department of Engineering Sciences. Uppsala University, Teknisk-naturvetenskapliga vetenskapsområdet, Technology, Department of Engineering Sciences, Solid State Physics. Fasta tillståndets fysik.
    Studies of Polaritonic Gaps in Photonic Crystals2004In: Optical Interference Coatings VIIIX, Tucson, Arizona, 2004Conference paper (Other scientific)
  • 17.
    Rung, Andreas
    et al.
    Uppsala University, Teknisk-naturvetenskapliga vetenskapsområdet, Technology, Department of Engineering Sciences. Uppsala University, Teknisk-naturvetenskapliga vetenskapsområdet, Technology, Department of Engineering Sciences, Solid State Physics. Fasta tillståndets fysik.
    Högström, Herman
    Uppsala University, Teknisk-naturvetenskapliga vetenskapsområdet, Technology, Department of Engineering Sciences. Uppsala University, Teknisk-naturvetenskapliga vetenskapsområdet, Technology, Department of Engineering Sciences, Solid State Physics. Fasta tillståndets fysik.
    Ribbing, Carl-Gustaf
    Uppsala University, Teknisk-naturvetenskapliga vetenskapsområdet, Technology, Department of Engineering Sciences. Uppsala University, Teknisk-naturvetenskapliga vetenskapsområdet, Technology, Department of Engineering Sciences, Solid State Physics. Fasta tillståndets fysik.
    Destruction of a polaritonic gap by a high index matrix2004In: PECS-V Int. Symp. Phot. and EM Crystal Structures: Kyoto, 2004Conference paper (Other scientific)
  • 18.
    Rung, Andreas
    et al.
    Uppsala University, Teknisk-naturvetenskapliga vetenskapsområdet, Technology, Department of Engineering Sciences. Uppsala University, Teknisk-naturvetenskapliga vetenskapsområdet, Technology, Department of Engineering Sciences, Solid State Physics. Fasta tillståndets fysik.
    Högström, Herman
    Uppsala University, Teknisk-naturvetenskapliga vetenskapsområdet, Technology, Department of Engineering Sciences. Uppsala University, Teknisk-naturvetenskapliga vetenskapsområdet, Technology, Department of Engineering Sciences, Solid State Physics. Fasta tillståndets fysik.
    Ribbing, Carl-Gustaf
    Uppsala University, Teknisk-naturvetenskapliga vetenskapsområdet, Technology, Department of Engineering Sciences. Uppsala University, Teknisk-naturvetenskapliga vetenskapsområdet, Technology, Department of Engineering Sciences, Solid State Physics. Fasta tillståndets fysik.
    Polartonic and Structural Gaps in 1-dimensional Photonic Crystals2004In: Int. Symp. Phot an EM Crystal Structures: PECS-V, Kyoto, 2004Conference paper (Other scientific)
  • 19.
    Rung, Andreas
    et al.
    Uppsala University, Teknisk-naturvetenskapliga vetenskapsområdet, Technology, Department of Engineering Sciences. Uppsala University, Teknisk-naturvetenskapliga vetenskapsområdet, Technology, Department of Engineering Sciences, Solid State Physics. Fasta tillståndets fysik.
    Ribbing, Carl-Gustaf
    Uppsala University, Teknisk-naturvetenskapliga vetenskapsområdet, Technology, Department of Engineering Sciences. Uppsala University, Teknisk-naturvetenskapliga vetenskapsområdet, Technology, Department of Engineering Sciences, Solid State Physics. Fasta tillståndets fysik.
    Polaritonic and Photonic Gap Interactions in a Two-Dimensional Photonic Crystal2004In: The American Physical Society, Vol. 92, no 12Article in journal (Refereed)
  • 20.
    Rung, Andreas
    et al.
    Uppsala University, Disciplinary Domain of Science and Technology, Technology, Department of Engineering Sciences, Solid State Physics.
    Ribbing, Carl-Gustaf
    Uppsala University, Disciplinary Domain of Science and Technology, Technology, Department of Engineering Sciences, Solid State Physics.
    Qiu, Min
    Gap Maps for Triangular Photonic Crystals with a Dispersive and Absorbing Component2005In: Physical Review B. Condensed Matter and Materials Physics, ISSN 1098-0121, E-ISSN 1550-235X, Vol. 72, no 20, p. 205120-Article in journal (Refereed)
    Abstract [en]

    Some consequences of a strong lattice resonance in the working frequency region of a 2D photonic crystal are investigated. It opens for two kinds of gaps in the dispersion relations: structure gaps and a polaritonic gap. A transverse optical oscillator model for ceramic beryllium oxide has been used to simulate the dielectric function of the polaritonic medium. The effective index of refraction is different on either side of the resonance, which causes BeO to act both as a high index material and a low index material. Gap maps for two kinds of triangular structures were calculated: BeO cylinders in air or in a high-index, nondispersive dielectric. These gap maps show appearance and disappearance of the transverse electric, transverse magnetic, and complete structure gaps as function of the packing fraction r/a, and the lattice constant a. The results illustrate the importance of whether the dielectric or the polaritonic material has the higher effective dielectric function. The effects of absorption, included by the damping parameter of the oscillator model, are briefly discussed.

  • 21.
    Strömme, Maria
    et al.
    Uppsala University, Disciplinary Domain of Science and Technology, Technology, Department of Engineering Sciences, Solid State Physics.
    Karmhag, Richard
    Uppsala University, Disciplinary Domain of Science and Technology, Technology, Department of Engineering Sciences, Solid State Physics.
    Ribbing, Carl-Gustaf
    Uppsala University, Disciplinary Domain of Science and Technology, Technology, Department of Engineering Sciences, Solid State Physics.
    Optical constants of sputtered hafnium nitride films. Intra- and interband contributions1995In: Optical materials (Amsterdam), ISSN 0925-3467, E-ISSN 1873-1252, Vol. 4, no 5, p. 629-639Article in journal (Refereed)
    Abstract [en]

    Transparent and opaque films of hafnium nitride have been prepared by reactive magnetron sputtering in an argon-nitrogen atmosphere. The films were deposited upon heated Coming glass substrates with a deposition rate of about 2.1 nm/s. The optical constants of the films were calculated using Kramers-Kronig integration and ellipsometry for the opaque samples and a combined method for transparent samples. Detailed observation of the thickness variation in the optical constants revealed a clear trend: larger n-values and smaller k-values in the VIS-and NIR-range for thinner films. This was analysed within the framework of the classical Drude model and found to be an effect of shorter relaxation time for thinner films. The effect is as large as a factor of three in the film thickness interval 15–380 nm. The optical effective mass of the d-electrons was found to be in the interval 0.82–0.95 of the free electron mass, which is significantly lower than in TiN but similar to ZrN. The interband contribution to ϵ2(ω) was obtained by subtraction of the Drude part from the experimental dielectric function. It exhibits a sharp increase for λ < 400 nm, indicating the threshold for interband transistion.

  • 22.
    Tian, Jie
    et al.
    KTH.
    Yan, Min
    Qiu, Min
    Ribbing, Carl-Gustaf
    Uppsala University, Disciplinary Domain of Science and Technology, Technology, Department of Engineering Sciences, Solid State Physics.
    Liu, Ya-Zhao
    Zhang, Dao-Zhong
    Li, Zhi-Yuan
    Direct characterization of focusing light by negative refraction in a photonic crystal flat lens2008In: Applied Physics Letters, ISSN 0003-6951, E-ISSN 1077-3118, Vol. 93, no 19, p. 191114-Article in journal (Refereed)
    Abstract [en]

    We report the experimental measurement of the field distribution of the spot light focused by a two-dimensional photonic crystal flat lens at wavelengths 1.51-1.58 μm. The photonic crystal slab is fabricated on a silicon-on-insulator substrate by the focused-ion-beam direct-milling strategy. We demonstrate the light focusing by the photonic crystal slab through direct observation of the light spot entering into free space at the end facet of the slab lens. The beam profiles as the function of lateral position are measured and the minimal full-width-half-maximum of the beam 1.2 μm (0.77λ) is obtained.

  • 23.
    Zhao, S
    et al.
    Uppsala University, Teknisk-naturvetenskapliga vetenskapsområdet, Technology, Department of Engineering Sciences. Uppsala University, Teknisk-naturvetenskapliga vetenskapsområdet, Technology, Department of Engineering Sciences, Solid State Physics. Fasta tillståndets fysik.
    Ribbing, C G
    Uppsala University, Teknisk-naturvetenskapliga vetenskapsområdet, Technology, Department of Engineering Sciences. Uppsala University, Teknisk-naturvetenskapliga vetenskapsområdet, Technology, Department of Engineering Sciences, Solid State Physics. Fasta tillståndets fysik.
    Wäckelgård, E
    Uppsala University, Teknisk-naturvetenskapliga vetenskapsområdet, Technology, Department of Engineering Sciences. Uppsala University, Teknisk-naturvetenskapliga vetenskapsområdet, Technology, Department of Engineering Sciences, Solid State Physics. Fasta tillståndets fysik.
    New Method to Optimize a Solar Absorber Graded Film Profile2005In: J Solar Energy, Vol. 78, p. 125-130Article in journal (Refereed)
  • 24.
    Zhao, Shuxi
    et al.
    Uppsala University, Disciplinary Domain of Science and Technology, Technology, Department of Engineering Sciences, Solid State Physics. Fasta tillståndets fysik.
    Ribbing, C G
    Uppsala University, Disciplinary Domain of Science and Technology, Technology, Department of Engineering Sciences, Solid State Physics. Fasta tillståndets fysik.
    Coating a Reststrahlen Material for Selective Emisson2007Conference paper (Refereed)
  • 25.
    Zhao, Shuxi
    et al.
    Uppsala University, Disciplinary Domain of Science and Technology, Technology, Department of Engineering Sciences, Solid State Physics.
    Ribbing, Carl Gustaf
    Uppsala University, Disciplinary Domain of Science and Technology, Technology, Department of Engineering Sciences, Solid State Physics.
    Reactively sputtered aluminium nitride films for spectral emission control2008In: Proceedings / [ed] Norbert Kaiser, Michel Lequime, H Angus Macleod, 2008, p. 71011F-Conference paper (Refereed)
  • 26.
    Zhao, Shuxi
    et al.
    Uppsala University, Disciplinary Domain of Science and Technology, Technology, Department of Engineering Sciences, Solid State Physics.
    Ribbing, Carl-Gustaf
    Uppsala University, Disciplinary Domain of Science and Technology, Technology, Department of Engineering Sciences, Solid State Physics.
    Options for Reststrahlen Materials in Optical Surfaces and Filters2010In: Chinese Optics Letters, ISSN 1671-7694, Vol. 8, no Supplement 1, p. 119-124Article in journal (Refereed)
    Abstract [en]

    The current potential applications of reststrahlen bands in optical surfaces and components are reviewed. This type of interval with metallic-like high reflectance has been used for monochromatization in infrared and when wavelength selective low emittance is needed for frost prevention or infrared signature reduction. Associated features, including a narrow reflectance minimum for a wide range of angles of incidence, are potentially useful.

  • 27.
    Zhao, Shuxi
    et al.
    Uppsala University, Teknisk-naturvetenskapliga vetenskapsområdet, Technology, Department of Engineering Sciences. Uppsala University, Teknisk-naturvetenskapliga vetenskapsområdet, Technology, Department of Engineering Sciences, Solid State Physics. fasta tillståndets fysik.
    Ribbing, Carl-Gustaf
    Uppsala University, Teknisk-naturvetenskapliga vetenskapsområdet, Technology, Department of Engineering Sciences. Uppsala University, Teknisk-naturvetenskapliga vetenskapsområdet, Technology, Department of Engineering Sciences, Solid State Physics. fasta tillståndets fysik.
    Wäckelgård, Ewa
    Uppsala University, Teknisk-naturvetenskapliga vetenskapsområdet, Technology, Department of Engineering Sciences. Uppsala University, Teknisk-naturvetenskapliga vetenskapsområdet, Technology, Department of Engineering Sciences, Solid State Physics. fasta tillståndets fysik.
    New method to optimize a solar absorber graded film profile2004In: Solar Energy, Vol. 77Article in journal (Refereed)
  • 28.
    Zhao, Shuxi
    et al.
    Uppsala University, Disciplinary Domain of Science and Technology, Technology, Department of Engineering Sciences, Solid State Physics.
    Ribbing, C-G
    Uppsala University, Disciplinary Domain of Science and Technology, Technology, Department of Engineering Sciences, Solid State Physics.
    Options for Reststrahlen Materials in Optical Surfaces and Filters2009Conference paper (Refereed)
  • 29.
    Zhao, Shuxi
    et al.
    Uppsala University, Disciplinary Domain of Science and Technology, Technology, Department of Engineering Sciences, Solid State Physics.
    Zhu, Decchun
    Hefei University 230022, Hefei, PR. China.
    Ribbing, Carl-Gustaf
    Uppsala University, Disciplinary Domain of Science and Technology, Technology, Department of Engineering Sciences, Solid State Physics.
    Angular dependence of coloured absorber coatings2012In: The International Conference on Optical Thin Films and Coating Technology, 15-18 October 2012, Hangzhou, China: Frontiers of Optical Coatings / [ed] Weidong Shen, 2012Conference paper (Refereed)
    Abstract [en]

    Angular dependence of coloured absorber coatings

    Shuxi Zhao1, Dechun Zhu2 and Carl-G.Ribbing1

     

    1) Div. of Solid State Physics, Ångström Laboratory, Uppsala University

         Box 534, SE-751 21 Uppsala, Sweden

    2) Dept. of Chemical and Materials Engineering, Hefei University

         230022, Hefei, PR. China

     

    Abstract

    Investigations of angular dependence of thermal solar absorber coatings have been carried out in the Uppsala SSP-division since more than 10 years. In this contribution the angular variation of the optical properties of the recently suggested TiAlN-based coloured absorber is reported.

      The presence of an interference controlled colour raises a concern that strong irradiscence might make the roof integration of such absorbers aesthetically unsuitable. Using colour coordinates calculated from the measured reflectance spectra we reach the conclusion that the attractive colour seen in normal incidence is only marginally changed by the natural change of angle of incidence for a stationary collector.

      A second issue to be considered is whether this new absorber surface performs better or worse than earlier cermet absorbers when the solar incidence angle varies. The reflectance of TiAlN, as well as the antireflected TiAlON, as a function of wavelength and angle of incidence has therefore been measured using an integrating sphere with a rotatable sample holder in the centre. For comparison and calibration such measurements, such measurement was also carried out on a freshly sputtered, opaque gold film. The angular variation was fitted using the Incident Angle Modifier Kta, the ratio of the measured absorptance for incidence angle, to that at normal incidence:

    Abstract

    Investigations of angular dependence of thermal solar absorber coatings have been carried out in the Uppsala SSP-division since more than 10 years. In this contribution the angular variation of the optical properties of the recently suggested TiAlN-based coloured absorber is reported.

      The presence of an interference controlled colour raises a concern that strong irradiscence might make the roof integration of such absorbers aesthetically unsuitable. Using colour coordinates calculated from the measured reflectance spectra we reach the conclusion that the attractive colour seen in normal incidence is only marginally changed by the natural change of angle of incidence for a stationary collector.

  • 30.
    Zhao, Shuxi
    et al.
    Uppsala University, Disciplinary Domain of Science and Technology, Technology, Department of Engineering Sciences, Solid State Physics.
    Zhu, Dechun
    Department of Chemical and Materials Engineering, Hefei University, China.
    Ribbing, Carl-Gustaf
    Uppsala University, Disciplinary Domain of Science and Technology, Technology, Department of Engineering Sciences, Solid State Physics.
    Colour control and selectivity in TiAlN solar-thermal absorbers2011In: Advances in Optical Thin Films IV. Optical Systems Design 2011, 5 September 2011, Marseille, France, / [ed] Michel Lequime, H. Angus Macleod, Detlev Ristau, Washington: SPIE - International Society for Optical Engineering, 2011, p. 81680G-1-81680G-9Conference paper (Refereed)
    Abstract [en]

    Optical constants for simulations were obtained by R- and T-measurements on TiAlN thin films deposited on Corning 7059 glass. The model parameterized free carrier effects and an inter-band excitation. The calculations demonstrated that the colour effects are due to interference and inter-band absorption around 500 nm in a single layer coating. The peak shifts with the thickness of the thin film which gives a simple way to obtain different colours. Solar absorptance of 86 % can be reached already for a single TiAlN-film on an Al substrate.

1 - 30 of 30
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