Liquid-crystal-based magnetically tunable terahertz achromatic quarter-wave plate
| Autor: | Chan-Shan Yang, Ci-Ling Pan, Fang Cih Shih, Cho Fan Hsieh, Ru-Pin Pan |
|---|---|
| Rok vydání: | 2019 |
| Předmět: |
Birefringence
Materials science Terahertz radiation business.industry Phase (waves) 02 engineering and technology 021001 nanoscience & nanotechnology 01 natural sciences Waveplate Atomic and Molecular Physics and Optics law.invention Terahertz spectroscopy and technology 010309 optics Optics Achromatic lens law Liquid crystal 0103 physical sciences Wideband 0210 nano-technology business |
| Zdroj: | Optics express. 27(7) |
| ISSN: | 1094-4087 |
| Popis: | 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. |
| Databáze: | OpenAIRE |
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