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Optical Excitation of Surface Phonon Polaritons in Silicon Carbide by a Hole Array Fabricated by a Focused Ion Beam
Uppsala University, Disciplinary Domain of Science and Technology, Technology, Department of Engineering Sciences, Solid State Physics.
Uppsala University, Disciplinary Domain of Science and Technology, Technology, Department of Engineering Sciences, Solid State Physics.
Uppsala University, Disciplinary Domain of Science and Technology, Technology, Department of Engineering Sciences, Solid State Physics.
2007 (English)In: Optical materials (Amsterdam), ISSN 0925-3467, E-ISSN 1873-1252, Vol. 30, no 2, 328-333 p.Article in journal (Refereed) Published
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.

Place, publisher, year, edition, pages
2007. Vol. 30, no 2, 328-333 p.
Keyword [en]
Ionic crystals, Microstructure fabrication, Surface waves, Polaritons
National Category
Engineering and Technology
Identifiers
URN: urn:nbn:se:uu:diva-94547DOI: 10.1016/j.optmat.2006.11.064ISI: 000250189300022OAI: oai:DiVA.org:uu-94547DiVA: diva2:168428
Available from: 2006-04-28 Created: 2006-04-28 Last updated: 2016-04-07Bibliographically approved
In thesis
1. Optical Studies of Periodic Microstructures in Polar Materials
Open this publication in new window or tab >>Optical Studies of Periodic Microstructures in Polar Materials
2006 (English)Doctoral thesis, comprehensive summary (Other academic)
Abstract [en]

The optical properties of matter are determined by the coupling of the incident electromagnetic radiation to oscillators within the material. The oscillators can be electrons, ions or molecules. Close to a resonance the dielectric function exhibits strong dispersion and may be negative. A negative dielectric function gives rise to a complex wave vector which is associated with no allowed states for photons, i.e. high extinction and bulk reflectance, as well as the possibility to support surface waves.

It is possible to manufacture a dielectric material that generates a complex wave vector. Such materials are called photonic crystals and they may exhibit a frequency range without allowed states for photons, i.e. an energy gap. A photonic crystal has a periodically varying dielectric function and the lattice constant is of the same order of magnitude as the wavelengths of the gap.

In this thesis, two optical phenomena causing a complex wave vector are combined. Polar materials, which have lattice resonance in the thermal infrared causing strong dispersion, are studied in combination with a periodic structure. The periodicity introduced is achieved using another material, but also by structuring of the polar material. One, two and three dimensional structures are considered. The polar materials used are silicon dioxide and silicon carbide. It is shown, both by calculations and experiments that the two optical phenomena can co-exist and interact, both constructively and destructively. A possible application for the combination of the two phenomena is discussed: Selective emittance in the thermal infrared. It is also shown that a polar material can be periodically structured by a focused ion beam in such way that it excites surface waves.

Place, publisher, year, edition, pages
Uppsala: Acta Universitatis Upsaliensis, 2006. 69 p.
Series
Digital Comprehensive Summaries of Uppsala Dissertations from the Faculty of Science and Technology, ISSN 1651-6214 ; 189
Keyword
Engineering physics, polaritonic, polar, photonic crystal, surface phonon polariton, multilayer, Reststrahlen, SiC, SiO2, Teknisk fysik
Identifiers
urn:nbn:se:uu:diva-6896 (URN)91-554-6578-1 (ISBN)
Public defence
2006-05-24, Siegbahnsalen, Ångströmlaboratoriet, Ångströml Lägerhyddsvägen 1, Uppsala, 09:30
Opponent
Supervisors
Available from: 2006-04-28 Created: 2006-04-28 Last updated: 2011-04-07Bibliographically approved

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Högström, HermanRibbing, Carl Gustaf

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