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pro vyhledávání: '"Petrov, Alexander Yu."'
Significant suppression of radiation in 3D structured media with small refractive index 1.4-1.6, such as of glass or polymers, is a desirable feature yet to be obtained. For periodical structures this is realised at frequencies of the complete photon
Externí odkaz:
http://arxiv.org/abs/2209.15463
An optical pulse asymptotically reaching zero group velocity in tapered waveguides can ultimately stop at a certain position in the taper accompanied by a strong spatial compression. This phenomenon can be also observed in spatio-temporal systems whe
Externí odkaz:
http://arxiv.org/abs/2103.01680
Here we report the first experimental demonstration of light trapping by a refractive index front in a silicon waveguide, the optical push broom effect. The front generated by a fast pump pulse collects and traps the energy of a CW signal with smalle
Externí odkaz:
http://arxiv.org/abs/2010.12424
The minimal refractive index contrast to obtain a complete photonic bandgap (CPBG) in structured media was not identified so far. We address this problem by considering distributed quasicrystals in with arbitrary number and positions of Bragg peaks i
Externí odkaz:
http://arxiv.org/abs/1909.09521
Autor:
Maiwald, Lukas, Lang, Slawa, Jalas, Dirk, Renner, Hagen, Petrov, Alexander Yu., Eich, Manfred
Disordered structures producing a non-iridescent color impression have been shown to feature a spherically shaped Fourier transform of their refractive-index distribution. We determine the direction and efficiency of scattering from thin films made f
Externí odkaz:
http://arxiv.org/abs/1803.01755
Autor:
Shang, Guoliang, Maiwald, Lukas, Renner, Hagen, Jalas, Dirk, Dosta, Maksym, Heinrich, Stefan, Petrov, Alexander Yu., Eich, Manfred
Non-iridescent structural colors based on disordered arrangement of monodisperse spherical particles, also called photonic glass, show low color saturation due to gradual transition in reflectivity. No significant improvement is usually expected from
Externí odkaz:
http://arxiv.org/abs/1802.10536
Autor:
Lang, Slawa, Maiwald, Lukas, Renner, Hagen, Jalas, Dirk, Petrov, Alexander Yu., Eich, Manfred
We present a full vectorial first-order approach to the scattering by arbitrary photonic structures with a low refractive index contrast. Our approach uses the first-order Born approximation and keeps the simple geometrical representation of the Ewal
Externí odkaz:
http://arxiv.org/abs/1802.07058
Autor:
Gaafar, Mahmoud A., Jalas, Dirk, OFaolain, Liam, Li, Juntao, Krauss, Thomas F., Petrov, Alexander Yu., Eich, Manfred
Reflection at relativistically moving plasma mirrors is a well-known approach for frequency conversion as an alternative to nonlinear techniques. A key issue with plasma mirrors is the need for a high carrier concentration, of order 10^21 cm^-3, to a
Externí odkaz:
http://arxiv.org/abs/1705.04808
Akademický článek
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Autor:
Gehensel, Raphael J., Zierold, Robert, Schaan, Gunnar, Shang, Guoliang, Petrov, Alexander Yu, Eich, Manfred, Blick, Robert, Krekeler, Tobias, Janssen, Rolf, Furlan, Kaline P. *
Publikováno v:
In Journal of the European Ceramic Society July 2021 41(7):4302-4312
