標題: Liquid-crystal-based electrically tunable THz optical devices - art. no. 648709
作者: Pan, Ci-Ling
Pan, Ru-Pin
電子物理學系
光電工程學系
Department of Electrophysics
Department of Photonics
關鍵字: THz;liquid-crystal devices;far infrared;phase shifters
公開日期: 2007
摘要: In this work, we report recent progress in liquid-crystal-based electrically tunable THz optical devices. Tunable phase shift up to 360 degrees at I THz is demonstrated using electrically controlled birefringence in a vertically aligned nematic liquid crystal (E7) cell, 1.83 nun in thickness. The driving voltage and corresponding field required for a phase shift of 360 degrees at 1 THz are 100 V and 90.5 V/cm, respectively. A sandwiched NLC cell about 2 mm in total thickness is used to increase the interaction length while minimizing Fresnel losses at the interfaces. A phase shift of 367 degrees is demonstrated at 1.05 THz, significantly improving the dynamic response of the device.
URI: http://hdl.handle.net/11536/5412
http://dx.doi.org/10.1117/12.717074
ISBN: 978-0-8194-6600-6
ISSN: 0277-786X
DOI: 10.1117/12.717074
期刊: Emerging Liquid Crystal Technologies II
Volume: 6487
起始頁: 48709
結束頁: 48709
Appears in Collections:Conferences Paper


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