Zobrazeno 1 - 10
of 210
pro vyhledávání: '"Astratov, Vasily N."'
Autor:
Bidney, Grant W., Duran, Joshua M., Ariyawansa, Gamini, Anisimov, Igor, Allen, Kenneth W., Astratov, Vasily N.
Light-concentrating truncated Si micropyramidal arrays with 54.7 degree sidewall angles were successfully integrated with PtSi Schottky barrier photodetectors. Four different devices consisting of 10 x 10 photodetectors with 60 um pitch combined in p
Externí odkaz:
http://arxiv.org/abs/2309.15077
Autor:
Bidney, Grant W., Jean, Amstrong R., Duran, Joshua M., Ariyawansa, Gamini, Anisimov, Igor, Allen, Kenneth W., Astratov, Vasily N.
This research was devoted to modeling of the optical properties of Si micropyramids aimed at designing optimal structures for applications as light concentrators in mid-wave infrared (MWIR) focal place arrays (FPAs). It is shown that completely diffe
Externí odkaz:
http://arxiv.org/abs/2309.15073
Autor:
Khoa, Vo Anh, Bidney, Grant W., Klibanov, Michael V., Nguyen, Loc H., Nguyen, Lam H., Sullivan, Anders J., Astratov, Vasily N.
This report extends our recent progress in tackling a challenging 3D inverse scattering problem governed by the Helmholtz equation. Our target application is to reconstruct dielectric constants, electric conductivities and shapes of front surfaces of
Externí odkaz:
http://arxiv.org/abs/2006.00913
Autor:
Khoa, Vo Anh, Bidney, Grant W., Klibanov, Michael V., Nguyen, Loc H., Nguyen, Lam H., Sullivan, Anders J., Astratov, Vasily N.
Inverse scattering problems of the reconstructions of physical properties of a medium from boundary measurements are substantially challenging ones. This work aims to verify the performance on experimental data of a newly developed convexification me
Externí odkaz:
http://arxiv.org/abs/2003.11513
Autor:
Klibanov, Michael V., Koshev, Nikolay A., Nguyen, Dinh-Liem, Nguyen, Loc H., Brettin, Aaron, Astratov, Vasily N.
We propose in this paper a globally numerical method to solve a phaseless coefficient inverse problem: how to reconstruct the spatially distributed refractive index of scatterers from the intensity (modulus square) of the full complex valued wave fie
Externí odkaz:
http://arxiv.org/abs/1803.01374
Autor:
Li, Yangcheng, Abolmaali, Farzaneh, Allen, Kenneth W., Limberopoulos, Nicholaos I., Urbas, Augustine, Rakovich, Yury, Maslov, Alexey V., Astratov, Vasily N.
This work takes inspiration from chemistry where the spectral characteristics of the molecules are determined by hybridization of electronic states evolving from the individual atomic orbitals. Based on analogy between quantum mechanics and the class
Externí odkaz:
http://arxiv.org/abs/1703.01399
Autor:
Astratov, Vasily N., Abolmaali, Farzaneh, Brettin, Aaron, Allen, Kenneth W., Maslov, Alexey V., Limberopoulos, Nicholaos I., Walker Jr., Dennis E., Urbas, Augustine M.
Despite all the success with developing super-resolution imaging techniques, the Abbe limit poses a severe fundamental restriction on the resolution of far-field imaging systems based on diffraction of light. Imaging with contact microlenses, such as
Externí odkaz:
http://arxiv.org/abs/1606.05145
Autor:
Allen, Kenneth W., Farahi, Navid, Li, Yangcheng, Limberopoulos, Nicholaos I., Walker Jr., Dennis E., Urbas, Augustine M., Liberman, Vladimir, Astratov, Vasily N.
Publikováno v:
Ann. Phys. (Berlin) 527, No. 7-8, 513-522 (2015)
Microsphere-assisted imaging emerged as a surprisingly simple way of achieving optical super-resolution imaging. In this work, we use movable PDMS thin films with embedded high-index barium titanate glass microspheres a sample scanning capability was
Externí odkaz:
http://arxiv.org/abs/1508.05663
Light pressure effect has been discovered long ago and has been used as an optical method to manipulate microand nanoparticles. It is usually considered as a nonresonant effect determined by the transfer of the momentum of light. However, recently we
Externí odkaz:
http://arxiv.org/abs/1502.06294
We experimentally studied whispering-gallery modes(WGMs) and demonstrated resonance enhancement of optical forces evanescently exerted on dielectric microspheres. We showed that the resonant light pressure can be used for optical sorting of micropart
Externí odkaz:
http://arxiv.org/abs/1502.06298