Results 11 to 20 of about 21,693,337 (313)

High contrast gratings for high-precision metrology

, 2022
Paper 86330MExperiments in the field of high-precision optical metrology are crucially limited by thermal noise of the optical components such as mirrors or beam splitters.
Steiner, Stefan, Kley, Ernst-Bernhard, Tünnermann, Andreas, Kroker, Stefanie, Käsebier, Thomas   +4 more
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Asymmetric direction selective filter elements based on high-contrast gratings

, 2022
Paper 86330ZWe present novel filter elements with an asymmetric angle dependent transmission based on high-contrast gratings. Asymmetric means a different efficiency for positive and negative incidence angles.
Fuchs, Jörg, Steiner, Stefan, Kley, Ernst-Bernhard, Voigt, Daniel, Tünnermann, Andreas, Kroker, Stefanie, Käsebier, Thomas, Fuchs, Frank   +7 more
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Tuning the reflectivity of high contrast gratings based on silicon and silica by means of wet etching with hydrofluoric acid

, 2022
Paper 82700UWe report on experimental etching techniques to trim the efficiency of high-contrast gratings based on silicon and silica. We show that the resonance wavelength and hence the reflectivity can be tuned by means of selectively etching the ...
Kley, Ernst-Bernhard, Jacobitz, Tassilo, Tünnermann, Andreas, Kroker, Stefanie, Käsebier, Thomas   +4 more
core   +1 more source

Diffractive optical elements based on subwavelength high-contrast gratings

, 2022
Paper 82700PWe report on novel concepts for reflective diffractive elements based on high-contrast gratings. To demonstrate the possibilities for such devices reflective cavity couplers with three output ports are investigated.
Steiner, Stefan, Kley, Ernst-Bernhard, Weber, Thomas, Tünnermann, Andreas, Kroker, Stefanie, Käsebier, Thomas, Fuchs, Frank   +6 more
core   +1 more source

Novel direction selective filter elements based on high-contrast gratings

, 2022
Paper 827007We introduce concepts for direction selective transmission filters based on dielectric high-contrast gratings. The devices act as angular bandpass filters at an incidence angle of 45° with a total transmission of 68% and a full width at half ...
Steiner, Stefan, Kley, Ernst-Bernhard, Tünnermann, Andreas, Kroker, Stefanie, Käsebier, Thomas, Fuchs, Frank   +5 more
core   +1 more source

Investigation on the angular dependent reflectance of coupled high-contrast gratings

, 2022
Paper 89950BIn this contribution we discuss configurations of stacked silicon high contrast gratings (HCGs) which are separated by a thin silicon dioxide grating such that they are coupled via their near-fields.
Kley, Ernst-Bernhard, Tünnermann, Andreas, Kroker, Stefanie, Käsebier, Thomas   +3 more
core   +1 more source

Image fusion for dynamic contrast enhanced magnetic resonance imaging [PDF]

, 2004
Twellmann T, Saalbach A, Gerstung O, Leach MO, Nattkemper TW. Image fusion for dynamic contrast enhanced magnetic resonance imaging. Biomed Eng Online. 2004;3(1): 35.BACKGROUND: Multivariate imaging techniques such as dynamic contrast-enhanced magnetic ...
Nattkemper, Tim Wilhelm ; https://orcid.org/, Nattkemper Tim W, Saalbach, A, Olaf Gerstung, Gerstung, O., Leach, M.O., Twellmann Thorsten, Twellmann, Thorsten, Nattkemper, TW, Axel Saalbach, Tim W Nattkemper, Leach, Martin O, Gerstung Olaf, Twellmann, T Thorsten, Thorsten Twellmann, Gerstung, Olaf, Saalbach Axel, Saalbach, Axel, Leach Martin O, Gerstung, O, Nattkemper, T.W., Martin O Leach, Saalbach, A., Twellmann, T.   +23 more
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A High-precision Technique to Correct for Residual Atmospheric Dispersion in High-contrast Imaging Systems

Publications of the Astronomical Society of the Pacific, 2016
8 Pages, 10 figures, accepted to ...
Pathak, P., Guyon, O., Jovanovic, N., Lozi, J., Martinache, Frantz, Minowa, Y., Kudo, T., Takami, H., Hayano, Y., Narita, N.   +9 more
openaire   +3 more sources

Review and scientific prospects of high-contrast optical stellar interferometry [PDF]

, 2020
High-contrast optical stellar interferometry generally refers to instruments able to detect circumstellar emission at least a few hundred times fainter than the host star at high-angular resolution (typically within a few λ/D). While such contrast levels
Denis Defrère, Norris, B., Jean-Philippe Berger, Bertrand Mennesson, Peter G. Tuthill, Danchi, W. C., Adrian M. Glauser, Kraus, S., Serabyn, E., Absil, O., Matthias Nowak, Michael J. Ireland, Gardner, A., Jörg-Uwe Pott, Laugier, R., Frank Eisenhauer, Sylvestre Lacour, Glauser, A., Steve Ertel, Colin Dandumont, Absil, Olivier, Stefan Kraus, Julien Woillez, Loicq, J., Marc-Antoine Martinod, Ertel, S., Sascha P. Quanz, Defrère, D., Stone, J., Martin, G., Berger, J.-P, Hinz, P., Mennesson, B., Labadie, L., Monnier, J., Martinache, F., Pott, J.U., Guillermo Martin, William C. Danchi, Jérôme Loicq, Danchi, W.C., Dandumont, C., Tuthill, P., Berger, J.-P., Olivier Absil, Philip M. Hinz, Barnaby Norris, Nowak, M., Romain Laugier, Woillez, J., Jens Kammerer, Martinod, M.A., Frantz Martinache, Dandumont, Colin, Loicq, Jerôme, Eisenhauer, F., Kammerer, J., Quanz, S.P., Defrere, Denis, Lacour, S., Lucas Labadie, Ireland, M., John D. Monnier, Gardner, T., Tyler Gardner, Jordan Stone, Eugene Serabyn   +66 more
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High-contrast Background-free Magnetic Resonance Molecular Imaging [PDF]

, 2021
One of the holy grails in cancer detection and therapy is to simultaneously image and deliver drugs to the tumor site using a safe nanoparticle. Liposomes are a well-known safe and stable nanoparticles that can be loaded with a drug and suitable contrast
Fang-Chu, Lin, Zhao, Li, Chao-Hsiung, Hsu, Sayoni, Ray, Yung-Ya, Lin   +4 more
core   +1 more source