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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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in
Optics Express
volume
15
issue
14
pages
8898 - 8912
publisher
Optical Society of America
external identifiers
  • wos:000248393900045
  • scopus:34547180322
ISSN
1094-4087
language
English
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The information about affiliations in this record was updated in December 2015. The record was previously connected to the following departments: Chemical Physics (S) (011001060)
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
2016-04-01 17:09:52
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2020-12-08 05:07:01
@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    = {Optical Society of America},
  series       = {Optics Express},
  title        = {Fast one-dimensional photonic crystal modulators for the terahertz range},
  url          = {http://www.opticsinfobase.org/abstract.cfm?URI=oe-15-14-8898},
  volume       = {15},
  year         = {2007},
}