Two beam coupling gain enhancements in porphyrin:Zn-doped nematic liquid crystals by using grating translation technique with an applied dc field

Title
Two beam coupling gain enhancements in porphyrin:Zn-doped nematic liquid crystals by using grating translation technique with an applied dc field
Author(s)
곽종훈김은주[김은주]양혜리[양혜리]이상조김건엽[김건엽]이지원[이지원]
Keywords
PHOTOREFRACTIVE GRATINGS; ELECTRIC-FIELD
Issue Date
201004
Publisher
ELSEVIER SCIENCE BV
Citation
OPTICS COMMUNICATIONS, v.283, no.7, pp.1495 - 1499
Abstract
The two beam coupling (TBC) gains in porphyrin:Zn-doped nematic liquid crystals (NLCs) are greatly enhanced by adopting the grating translation technique with applying dc electric field. The maximum gain coefficient of Gamma = 624 cm(-1), whose value is at least three times larger than that of no grating translation was obtained under the applied dc field of E(0) = 1.2V/mu m and the grating translation speed of nu(q) = 33.4 mu m/s. Based on the material and torque balance equations for NLCs taking into account the grating translation, we present the theoretical expressions for TBC gain enhancements, showing excellent agreement with the experimental results. (C) 2009 Elsevier B.V. All rights reserved.
URI
http://hdl.handle.net/YU.REPOSITORY/22625http://dx.doi.org/10.1016/j.optcom.2009.11.086
ISSN
0030-4018
Appears in Collections:
이과대학 > 물리학과 > Articles
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