Zobrazeno 1 - 10
of 145
pro vyhledávání: '"R.W. Hellwarth"'
Publikováno v:
Topical Meeting on Photorefractive Materials, Effects, and Devices II.
In the only study to our knowledge of the photorefractive effect in n-type cubic Bi12SiO20 (n-BSO) at low temperatures (300 to 80 K), optical four-wave mixing via the photorefractive effect was found to decline over one order-of-magnitude as the temp
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::48529d7c99725209047492fa3cb73c21
https://doi.org/10.1364/pmed.1990.b9
https://doi.org/10.1364/pmed.1990.b9
Autor:
R.W. Hellwarth
Publikováno v:
Progress in Quantum Electronics. 5:1-68
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::a5d49a17a8e1ef58cc47ddebf926bf00
https://doi.org/10.1016/0079-6727(79)90002-8
https://doi.org/10.1016/0079-6727(79)90002-8
Autor:
R.W. Hellwarth
Publikováno v:
Solid State Communications. 32:85-88
We conjecture here that, unlike for crystal lattice modes, some nearly harmonic vibrational modes of a glass lattice may have their (thermally populated) energy levels shifted (from equal spacing) more than they are broadened, both the shifting and b
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::1c39ef9d652ad550b775d56851d15524
https://doi.org/10.1016/0038-1098(79)91004-4
https://doi.org/10.1016/0038-1098(79)91004-4
Publikováno v:
Journal of Molecular Spectroscopy. 91:269-272
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::e3ec45ba35fed5d24f59b27b1d3ab938
https://doi.org/10.1016/0022-2852(82)90045-5
https://doi.org/10.1016/0022-2852(82)90045-5
Publikováno v:
Journal of Physics and Chemistry of Solids. 34:2105-2115
The absorption β in ionic insulators due to multiphonon processes is examined for frequencies higher than several times the reststrahl frequency. The frequency dependence and temperature dependence of β are calculated for simple models which includ
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::7cd86afa7678ec594263dd0ac1736c47
https://doi.org/10.1016/s0022-3697(73)80058-7
https://doi.org/10.1016/s0022-3697(73)80058-7
Akademický článek
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Akademický článek
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Publikováno v:
Topical Meeting on Photorefractive Materials, Effects, and Devices.
We perform beam-coupling and erasure experiments in four different nominally undoped Bi12SiO20 (BSO) crystals. We use the theory of electron-hole competition1,2 in photorefractive gratings to analyze our data. We determine the diffusion- lengths Ke
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::eefe3f14d1e6b599b2155c6d98ec8198
https://doi.org/10.1364/prm.1987.wb1
https://doi.org/10.1364/prm.1987.wb1
Autor:
R.W. Hellwarth
We conjecture here that, unlike for crystal lattice modes, some nearly harmonic vibrational modes of a glass lattice may have their (thermally populated) energy levels shifted (from equal spacing) more than they are broadened, both the shifting and b
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::f285f3b19a8b0afdecbec266e406f250
https://doi.org/10.1016/b978-0-08-025425-8.50024-6
https://doi.org/10.1016/b978-0-08-025425-8.50024-6
