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Fast one-dimensional photonic crystal modulators for the terahertz range

Fekete, L.; Kadlec, F.; Nemec, Hynek LU and Kuzel, P. (2007) In Optics Express 15(14). p.8898-8912
Abstract
Optically controlled one-dimensional photonic crystal structures for the THz range are studied both theoretically and experimentally. A GaAs:Cr layer constitutes a defect in the photonic crystals studied; its photoexcitation by 800 nm optical femtosecond pulses leads to the modulation of the THz beam. Since the THz field can be localized in the photoexcited layer of the photonic crystal, the interaction between photocarriers and THz light is strengthened and yields an appreciable modulation of the THz output beam even for low optical pump fluences. Optimum resonant structures are found, constructed and experimentally studied. The dynamical response of these elements is shown to be controlled by the lifetime of THz photons in the resonator... (More)
Optically controlled one-dimensional photonic crystal structures for the THz range are studied both theoretically and experimentally. A GaAs:Cr layer constitutes a defect in the photonic crystals studied; its photoexcitation by 800 nm optical femtosecond pulses leads to the modulation of the THz beam. Since the THz field can be localized in the photoexcited layer of the photonic crystal, the interaction between photocarriers and THz light is strengthened and yields an appreciable modulation of the THz output beam even for low optical pump fluences. Optimum resonant structures are found, constructed and experimentally studied. The dynamical response of these elements is shown to be controlled by the lifetime of THz photons in the resonator and by the free carrier lifetime. The time response of the structures studied is shorter than 330 ps. (c) 2007 Optical Society of America. (Less)
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author
organization
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type
Contribution to journal
publication status
published
subject
in
Optics Express
volume
15
issue
14
pages
8898 - 8912
publisher
OSA
external identifiers
  • wos:000248393900045
  • scopus:34547180322
ISSN
1094-4087
language
English
LU publication?
yes
id
1958e412-abe4-40c5-bd1e-01c61201aba3 (old id 691410)
alternative location
http://www.opticsinfobase.org/abstract.cfm?URI=oe-15-14-8898
date added to LUP
2007-12-11 20:44:34
date last changed
2017-10-01 04:53:31
@article{1958e412-abe4-40c5-bd1e-01c61201aba3,
  abstract     = {Optically controlled one-dimensional photonic crystal structures for the THz range are studied both theoretically and experimentally. A GaAs:Cr layer constitutes a defect in the photonic crystals studied; its photoexcitation by 800 nm optical femtosecond pulses leads to the modulation of the THz beam. Since the THz field can be localized in the photoexcited layer of the photonic crystal, the interaction between photocarriers and THz light is strengthened and yields an appreciable modulation of the THz output beam even for low optical pump fluences. Optimum resonant structures are found, constructed and experimentally studied. The dynamical response of these elements is shown to be controlled by the lifetime of THz photons in the resonator and by the free carrier lifetime. The time response of the structures studied is shorter than 330 ps. (c) 2007 Optical Society of America.},
  author       = {Fekete, L. and Kadlec, F. and Nemec, Hynek and Kuzel, P.},
  issn         = {1094-4087},
  language     = {eng},
  number       = {14},
  pages        = {8898--8912},
  publisher    = {OSA},
  series       = {Optics Express},
  title        = {Fast one-dimensional photonic crystal modulators for the terahertz range},
  volume       = {15},
  year         = {2007},
}