Zobrazeno 1 - 10
of 413
pro vyhledávání: '"K. H. Ringhofer"'
Publikováno v:
The European Physical Journal D - Atomic, Molecular and Optical Physics. 23:291-297
We investigate analytically and numerically the influence of the type of the photorefractive nonlinear response on the periodic states (attractors) which occur during feedback controlled 2W-coupling and correspond to almost 100% diffraction efficienc
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::6f40d968a5450757d90f7787854cac78
https://doi.org/10.1140/epjd/e2003-00057-1
https://doi.org/10.1140/epjd/e2003-00057-1
Publikováno v:
Physical Review A. 56:R2541-R2544
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::05d9c7c8c546c8503120bedd80403421
https://doi.org/10.1103/physreva.56.r2541
https://doi.org/10.1103/physreva.56.r2541
Publikováno v:
Physical Review Letters. 78:4035-4038
We deduce the equation describing the refractive index perturbation in photovoltaic photorefractive crystals produced by the incidence of a focused laser beam and an incoherent uniform illumination. Under short-circuit conditions the equation shows a
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::e4025cb310636c6663172205cf632ab9
https://doi.org/10.1103/physrevlett.78.4035
https://doi.org/10.1103/physrevlett.78.4035
Publikováno v:
Physical Review E. 55:6072-6083
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::0b5081d32600378745b0b18d47c3b470
https://doi.org/10.1103/physreve.55.6072
https://doi.org/10.1103/physreve.55.6072
Autor:
Karsten Buse, K. H. Ringhofer
Publikováno v:
Applied Physics A Solids and Surfaces. 57:161-165
We calculate the influence of thermal patterns and pyroelectric fields on photorefractive holographic recording in terms of a one center charge transport model, taking into account diffusion, photovoltaic current and space charge limitation. At pulse
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::05298f0ac5be3a6b93ef2baf0a2a3d60
https://doi.org/10.1007/bf00331438
https://doi.org/10.1007/bf00331438
Publikováno v:
Photorefractive Effects, Materials, and Devices.
We present the results of numerical simulation of the feedback-controlled 2W-coupling in photorefractive crystals for nonlocal (typical for BaTiO3, SBN crystals) and resonant (DC-biased BSO, BTO and BGO crystals) photorefractive response. We demonstr
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::d551bdf842d9310b2d57fd9fb7855e28
https://doi.org/10.1364/pemd.2003.47
https://doi.org/10.1364/pemd.2003.47
Publikováno v:
Advances in Photorefractive Materials, Effects and Devices.
We show analytically and numerically that the decay of the light intensity caused by linear absorption affects strongly the charachteristics of 2W-coupling enhanced by a moving light pattern as well as the characteristics of subharmonic generation in
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::421a8ca9056d528dece4c4238ba1d421
https://doi.org/10.1364/apmed.1999.wmpc32
https://doi.org/10.1364/apmed.1999.wmpc32
Autor:
N. V. Kukhtarev, A. Gnatovskii, Z. Yanchuk, T. Semenets, L. Pryadko, Y. Kargin, K. H. Ringhofer
Publikováno v:
Photorefractive Materials, Effects, and Devices.
We have investigated the new doubly color sensitive photorefractive crystal Bi12Ti0.76V0.24O20 by writing a hologram in green (λ = 0.51 µm, cw-argon laser) and reading it out in red (λ = 0.63 µm, cw-HeNe laser). It was found that the diffraction
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::ea4d1668f6d16c43e496b0a96c68fd99
https://doi.org/10.1364/pmed.1991.mb1
https://doi.org/10.1364/pmed.1991.mb1
Publikováno v:
Photorefractive Materials, Effects, and Devices.
Recently, experiments with Bi12SiO20 (BSO) initiated by Mallick et al.[1] and continued by the Oxford group[2, 3, 4, 5, 6] have shown that, under certain conditions, one or more spatially subharmonic beams may arise between two pump beams (see Fig. 1
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::1ea36533ab79eee6350d48eb2a009667
https://doi.org/10.1364/pmed.1991.wc22
https://doi.org/10.1364/pmed.1991.wc22
Publikováno v:
Topical Meeting on Photorefractive Materials, Effects, and Devices II.
In 1988, Mallick et al.[1] found self-generated subharmonics in Bi12SiO20 (BSO). They used two coherent almost linear pump beams (wave vectors k→ p and k→ p ′ , see Fig. 1) with grating vector K→ and frequency detuning Ω, impinging on a 1 cm
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::1228aa4a07db8532b7c7ee21a3813e36
https://doi.org/10.1364/pmed.1990.b4
https://doi.org/10.1364/pmed.1990.b4