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Vargas Catalan, Ernesto
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Publications (10 of 30) Show all publications
Haas, J., Vargas Catalan, E., Piron, P., Karlsson, M. & Mizaikoff, B. (2018). Analyzing Glucose in Human Saliva with Broadly Tunable Quantum Cascade Lasers and Polycrystalline Diamond Waveguides. Analyst
Open this publication in new window or tab >>Analyzing Glucose in Human Saliva with Broadly Tunable Quantum Cascade Lasers and Polycrystalline Diamond Waveguides
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2018 (English)In: Analyst, ISSN 0003-2654Article in journal (Refereed) Submitted
National Category
Engineering and Technology Analytical Chemistry
Identifiers
urn:nbn:se:uu:diva-346526 (URN)
Available from: 2018-03-19 Created: 2018-03-19 Last updated: 2018-05-21
Piron, P., Vargas Catalan, E., Absil, O. & Karlsson, M. (2018). Birefringence measurements of diamond space-variant subwavelength gratings. Applied Optics, 57(17), 4909-4917
Open this publication in new window or tab >>Birefringence measurements of diamond space-variant subwavelength gratings
2018 (English)In: Applied Optics, ISSN 1559-128X, E-ISSN 2155-3165, Vol. 57, no 17, p. 4909-4917Article in journal (Refereed) Published
National Category
Engineering and Technology Atom and Molecular Physics and Optics
Identifiers
urn:nbn:se:uu:diva-346522 (URN)10.1364/AO.57.004909 (DOI)
Available from: 2018-03-19 Created: 2018-03-19 Last updated: 2018-06-09
Vargas Catalan, E. (2018). Microfabrication of Optical Components in Synthetic Diamond: Infrared Optics for Applications  in Astronomy and Spectroscopy. (Doctoral dissertation). Uppsala: Acta Universitatis Upsaliensis
Open this publication in new window or tab >>Microfabrication of Optical Components in Synthetic Diamond: Infrared Optics for Applications  in Astronomy and Spectroscopy
2018 (English)Doctoral thesis, comprehensive summary (Other academic)
Abstract [en]

Infrared optics is a broad general term, relevant to a range of fields. The manufactured diamond optical components utilized within this thesis were applied to both astronomy, in which direct imaging of star system using large ground-based telescopes and diamond coronagraphs was performed, and in absorption spectroscopy probing solvents and proteins using a tuneable quantum cascade laser and diamond waveguides.

The optical components presented in this thesis are all made from diamond, as it is one of few materials that is transparent in the infrared regime. Furthermore, diamond has other unique properties that include high thermal conductivity, low thermal expansion and chemically inertness. In this thesis synthetic diamond grown by chemical vapor deposition has been used, using commercially available components and equipment.

The focus of this thesis was to produce optical gratings for different applications using plasma etching. The first steps involved understanding the etch process and optimizing the plasma etch parameters to enable the fabrication of new types of nano/micro meter sized structures in diamond. Optimization of the etch masks is also included in the work. With this newfound knowledge, deeper and narrower optical gratings than before could be realized.

Optical evaluation of the gratings in special designed optical test benches was used to determine the coronagraphic performance of the manufactured diamond coronagraphs. Most often the designed etch depth could not be reached in the first attempt and therefore a post-fabrication method for tuning the etch depth was developed.  This showed to be vital to realising high performing diamond coronagraphs. Diamond coronagraphs were also installed in several ground based telescopes and discovery of new astronomical objects are presented. With deeper understanding of the etch process more complex coronagraphs in diamond were manufactured opening up for use in the next generation of giant telescopes.

In the second part of this thesis, fabrication of diamond waveguides for sensitive analysis of solvents and proteins using infrared spectroscopy is presented.  Different designs of diamond waveguides are demonstrated and initial analysis of organic compounds and glucose using a quantum cascade laser as the light source is presented. This type of biosensor will be used to study the secondary structure of proteins relevant for different diseases.

Place, publisher, year, edition, pages
Uppsala: Acta Universitatis Upsaliensis, 2018. p. 71
Series
Digital Comprehensive Summaries of Uppsala Dissertations from the Faculty of Science and Technology, ISSN 1651-6214 ; 1653
Keywords
Diamond, microfabrication, microoptics, astronomy, IR-spectroscopy, corongraph, waveguide
National Category
Engineering and Technology
Identifiers
urn:nbn:se:uu:diva-346531 (URN)978-91-513-0293-5 (ISBN)
Public defence
2018-05-18, Siegbahnsalen, Ångströmlaboratoriet, Lägerhyddsvägen 1, Uppsala, 13:00 (English)
Opponent
Supervisors
Available from: 2018-04-27 Created: 2018-03-23 Last updated: 2018-05-22
Haas, J., Vargas Catalan, E., Piron, P., Nikolajeff, F., Österlund, L., Karlsson, M. & Mizaikoff, B. (2018). Polycrystalline diamond thin-film waveguides for mid-infrared evanescent field sensors. ACS Omega, 3, 6190-6198
Open this publication in new window or tab >>Polycrystalline diamond thin-film waveguides for mid-infrared evanescent field sensors
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2018 (English)In: ACS Omega, ISSN 2470-1343, Vol. 3, p. 6190-6198Article in journal (Refereed) Published
National Category
Engineering and Technology Analytical Chemistry
Identifiers
urn:nbn:se:uu:diva-346523 (URN)10.1021/acsomega.8b00623 (DOI)
Available from: 2018-03-19 Created: 2018-03-19 Last updated: 2018-06-23
Vargas Catalan, E., Piron, P., Jolivet, A., Forsberg, P., Delacroix, C., Huby, E., . . . Karlsson, M. (2018). Subwavelength diamond gratings for vortex coronagraphy: towards annular groove phase mask for shorter wavelengths and topological charge 4 designs. Optical Materials Express, 8(7), 1976-1987
Open this publication in new window or tab >>Subwavelength diamond gratings for vortex coronagraphy: towards annular groove phase mask for shorter wavelengths and topological charge 4 designs
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2018 (English)In: Optical Materials Express, ISSN 2159-3930, E-ISSN 2159-3930, Vol. 8, no 7, p. 1976-1987Article in journal (Refereed) Published
National Category
Engineering and Technology Atom and Molecular Physics and Optics
Identifiers
urn:nbn:se:uu:diva-346520 (URN)10.1364/OME.8.001976 (DOI)
Available from: 2018-03-19 Created: 2018-03-19 Last updated: 2018-06-28
Mawet, D., Choquet, É., Absil, O., Huby, E., Bottom, M., Serabyn, E., . . . Vargas Catalan, E. (2017). Characterization of the inner disk around HD 141569 A from KECK/NIRC2 L-band vortex coronagraphy. Astronomical Journal, 153(1), 1-10, Article ID 44.
Open this publication in new window or tab >>Characterization of the inner disk around HD 141569 A from KECK/NIRC2 L-band vortex coronagraphy
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2017 (English)In: Astronomical Journal, ISSN 0004-6256, E-ISSN 1538-3881, Vol. 153, no 1, p. 1-10, article id 44Article in journal (Refereed) Published
Abstract [en]

HD 141569 A is a pre-main sequence B9.5 Ve star surrounded by a prominent and complex circumstellar disk, likely still in a transition stage from protoplanetary to debris disk phase. Here, we present a new image of the third inner disk component of HD 141569 A made in the L′ band (3.8 μm) during the commissioning of the vector vortex coronagraph that has recently been installed in the near-infrared imager and spectrograph NIRC2 behind the W. M. Keck Observatory Keck II adaptive optics system. We used reference point-spread function subtraction, which reveals the innermost disk component from the inner working distance of ;23 au and up to ;70 au. The spatial scale of our detection roughly corresponds to the optical and near-infrared scattered light, thermal Q, N, and 8.6 μm PAH emission reported earlier. We also see an outward progression in dust location from the L′ band to the H  band (Very Large Telescope/ SPHERE image)  to the visible (Hubble Space Telescope (HST)/ STIS image), which is likely indicative of dust blowout. The warm disk component is nested deep inside the two outer belts imaged by HST-NICMOS in 1999 ( at 406 and 245 au, respectively) . We fit our new L′ -band image and spectral energy distribution of HD 141569 A with the radiative transfer code MCFOST. Our best-fit models favor pure olivine grains and are consistent with the composition of the outer belts. While our image shows a putative very faint point-like clump or source embedded in the inner disk, we did not detect any true companion within the gap between the inner disk and the first outer ring, at a sensitivity of a few Jupiter masses.

Keywords
planet-disk interactions; planetary systems; planets and satellites: formation; protoplanetary disks; stars: pre-main sequence; stars: variables: T Tauri, Herbig Ae/Be
National Category
Engineering and Technology Astronomy, Astrophysics and Cosmology
Identifiers
urn:nbn:se:uu:diva-311377 (URN)10.3847/1538-3881/153/1/44 (DOI)000405784300002 ()
Available from: 2016-12-26 Created: 2016-12-26 Last updated: 2018-03-23Bibliographically approved
Hamberg, M., Vargas Catalan, E., Karlsson, M., Dancila, D., Rydberg, A., Ögren, J., . . . Vartiainen, I. (2017). Dielectric Laser Acceleration Setup Design, Grating Manufacturing and Investigations Into Laser Induced RF Cavity Breakdowns. In: Proceedings of FEL2017, Santa Fe, NM, USA: . Paper presented at 38th International Free-Electron Laser Conference, Santa Fe, 20-25 Aug..
Open this publication in new window or tab >>Dielectric Laser Acceleration Setup Design, Grating Manufacturing and Investigations Into Laser Induced RF Cavity Breakdowns
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2017 (English)In: Proceedings of FEL2017, Santa Fe, NM, USA, 2017Conference paper, Published paper (Refereed)
National Category
Accelerator Physics and Instrumentation Engineering and Technology
Identifiers
urn:nbn:se:uu:diva-336087 (URN)978-3-95450-179-3 (ISBN)
Conference
38th International Free-Electron Laser Conference, Santa Fe, 20-25 Aug.
Available from: 2017-12-12 Created: 2017-12-12 Last updated: 2017-12-14Bibliographically approved
Serabyn, E., Huby, E., Matthews, K., Mawet, D., Absil, O., Femenia, B., . . . Wertz, O. (2017). The W. M. Keck Observatory infrared vortex coronagraph and a first image of HIP79124 B. Astronomical Journal, 153(1), 1-7, Article ID 43.
Open this publication in new window or tab >>The W. M. Keck Observatory infrared vortex coronagraph and a first image of HIP79124 B
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2017 (English)In: Astronomical Journal, ISSN 0004-6256, E-ISSN 1538-3881, Vol. 153, no 1, p. 1-7, article id 43Article in journal (Refereed) Published
Abstract [en]

An optical vortex coronagraph has been implemented within the NIRC2 camera on the Keck II telescope and used to carry out on-sky tests and observations. The development of this new L′-band observational mode is described, and an initial demonstration of the new capability is presented: a resolved image of the low-mass companion to HIP 79124, which had previously been detected by means of interferometry. With HIP 79124 B at a projected separation of 186.5 mas, both the small inner working angle of the vortex coronagraph and the related imaging improvements were crucial in imaging this close companion directly. Due to higher Strehl ratios and more relaxed contrasts in L′ band versus H band, this new coronagraphic capability will enable high-contrast, small-angle observations of nearby young exoplanets and disks on a par with those of shorter-wavelength extreme adaptive optics coronagraphs.

Keywords
instrumentation: adaptive optics
National Category
Engineering and Technology Astronomy, Astrophysics and Cosmology
Identifiers
urn:nbn:se:uu:diva-311385 (URN)10.3847/1538-3881/153/1/43 (DOI)000405784300001 ()
Funder
EU, FP7, Seventh Framework Programme, 337569Swedish Research Council, 621-2014-5959
Available from: 2016-12-26 Created: 2016-12-26 Last updated: 2018-03-23Bibliographically approved
Castellá, B. F., Serabyn, E., Mawet, D., Absil, O., Wizinowich, P., Matthews, K., . . . Wertz, O. (2016). Commissioning and first light results of an L’-band vortex coronagraph with the Keck II adaptive optics NIRC2 science instrument. In: Marchetti, E; Close, LM; Veran, JP (Ed.), Adaptive Optics Systems V: . Paper presented at SPIE Astronomical Telescopes and Instrumentation, Adaptive Optics Systems V, 26 Jun 26 - JUL 1, 2016, Edinburgh, UNITED KINGDOM. SPIE - International Society for Optical Engineering, 9909, Article ID 990922.
Open this publication in new window or tab >>Commissioning and first light results of an L’-band vortex coronagraph with the Keck II adaptive optics NIRC2 science instrument
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2016 (English)In: Adaptive Optics Systems V / [ed] Marchetti, E; Close, LM; Veran, JP, SPIE - International Society for Optical Engineering, 2016, Vol. 9909, article id 990922Conference paper, Published paper (Refereed)
Abstract [en]

On March 2015 an L'-band vortex coronagraph based on an Annular Groove Phase Mask made up of a diamond sub-wavelength grating was installed on NIRC2 as a demonstration project. This vortex coronagraph operates in the L' band not only in order to take advantage from the favorable star/planet contrast ratio when observing beyond the K band, but also to exploit the fact that the Keck II Adaptive Optics (AO) system delivers nearly extreme adaptive optics image quality (Strehl ratios values near 90%) at 3.7 mu m. We describe the hardware installation of the vortex phase mask during a routine NIRC2 service mission. The success of the project depends on extensive software development which has allowed the achievement of exquisite real-time pointing control as well as further contrast improvements by using speckle nulling to mitigate the effect of static speckles. First light of the new coronagraphic mode was on June 2015 with already very good initial results. Subsequent commissioning nights were interlaced with science nights by members of the VORTEX team with their respective scientific programs. The new capability and excellent results so far have motivated the VORTEX team and the Keck Science Steering Committee (KSSC) to offer the new mode in shared risk mode for 2016B.

Place, publisher, year, edition, pages
SPIE - International Society for Optical Engineering, 2016
Series
Proceedings of SPIE, ISSN 0277-786X ; 9909
Keywords
WM Keck Observatory, NIRC2, high-contrast imaging, coronagraph, vortex phase mask
National Category
Astronomy, Astrophysics and Cosmology Atom and Molecular Physics and Optics Engineering and Technology
Identifiers
urn:nbn:se:uu:diva-300215 (URN)10.1117/12.2233228 (DOI)000387429700063 ()
Conference
SPIE Astronomical Telescopes and Instrumentation, Adaptive Optics Systems V, 26 Jun 26 - JUL 1, 2016, Edinburgh, UNITED KINGDOM
Available from: 2016-08-05 Created: 2016-08-05 Last updated: 2017-01-03Bibliographically approved
Vargas Catalan, E., Forsberg, P., Absil, O. & Karlsson, M. (2016). Controlling the profile of high aspect ratio gratings in diamond. Paper presented at 9th International Conference on New Diamond and Nano Carbons (NDNC). Diamond and related materials, 63, 60-68
Open this publication in new window or tab >>Controlling the profile of high aspect ratio gratings in diamond
2016 (English)In: Diamond and related materials, ISSN 0925-9635, E-ISSN 1879-0062, Vol. 63, p. 60-68Article in journal (Refereed) Published
Abstract [en]

Diamond is an excellent material for infrared optics and for applications in harsh environments. Some of those desirable properties, i.e. hardness and chemical inertness, also make it a challenging material to machine and etch. In this study we have tested a wide range of etch parameters in an inductively coupled plasma etcher, in order to produce highly controlled, high aspect ratio gratings in diamond. We discuss the effects of pressure, bias power, and some gas mixture variation (pure oxygen and argon-oxygen) on the etch results and how it im- pacts the etch mask sputtering and redeposition. We also present a method for applying a fresh aluminum mask, in order to etch even deeper optical grating. Gratings with aspect ratios as high as 1:13.5 have been achieved with a 1.42 μm grating period. 

Keywords
Grating; Reactive ion etching; Synthetic diamond; Sputtering
National Category
Manufacturing, Surface and Joining Technology Engineering and Technology
Research subject
Engineering Science with specialization in Materials Science
Identifiers
urn:nbn:se:uu:diva-260214 (URN)10.1016/j.diamond.2015.08.007 (DOI)000371942700012 ()
Conference
9th International Conference on New Diamond and Nano Carbons (NDNC)
Available from: 2015-08-17 Created: 2015-08-17 Last updated: 2018-03-23
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