標題: Liquid-crystal-based magnetically tunable terahertz achromatic quarter-wave plate
作者: Hsieh, Cho-Fan
Yang, Chan-Shan
Shih, Fang-Cih
Pan, Ru-Pin
Pan, Ci-Ling
電子物理學系
Department of Electrophysics
公開日期: 1-Apr-2019
摘要: Development of the wideband and tunable quasi-optic terahertz (THz) components is in high demand. In this work, we demonstrate a tunable achromatic quarter-wave plate (AQWP) for the THz frequency range. The phase retardation of this device can be set at 90 degrees +/- 9 degrees from 0.20 to 0.50 THz. The operation range from 0.20 to 0.50 THz can be tuned to from 0.30 to 0.70 THz by introducing three nematic liquid crystals phase retarders, of which the birefringence can be magnetically tuned. The frequency-dependent phase retardation is in good agreement with theoretical predictions. (C) 2019 Optical Society of America under the terms of the OSA Open Access Publishing Agreement
URI: http://dx.doi.org/10.1364/OE.27.009933
http://hdl.handle.net/11536/151943
ISSN: 1094-4087
DOI: 10.1364/OE.27.009933
期刊: OPTICS EXPRESS
Volume: 27
Issue: 7
起始頁: 9933
結束頁: 9940
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