Liquid-crystal-based magnetically tunable terahertz achromatic quarter-wave plate

Cho Fan Hsieh; Chan Shan Yang; Fang Cih Shih; Ru Pin Pan; Ci Ling Pan

doi:10.1364/OE.27.009933

Liquid-crystal-based magnetically tunable terahertz achromatic quarter-wave plate

Cho Fan Hsieh, Chan Shan Yang, Fang Cih Shih, Ru Pin Pan, Ci Ling Pan

Graduate Institute of Electro-Optical Engineering

Research output: Contribution to journal › Article › peer-review

28 Citations (Scopus)

Abstract

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° ± 9° 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.

Original language	English
Pages (from-to)	9933-9940
Number of pages	8
Journal	Optics Express
Volume	27
Issue number	7
DOIs	https://doi.org/10.1364/OE.27.009933
Publication status	Published - 2019 Apr 1

ASJC Scopus subject areas

Atomic and Molecular Physics, and Optics

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abstract = "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° ± 9° 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.",

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AU - Hsieh, Cho Fan

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AU - Pan, Ru Pin

AU - Pan, Ci Ling

PY - 2019/4/1

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AB - 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° ± 9° 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.

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Liquid-crystal-based magnetically tunable terahertz achromatic quarter-wave plate

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