期刊
OPTICS LETTERS
卷 45, 期 10, 页码 2834-2837出版社
OPTICAL SOC AMER
DOI: 10.1364/OL.393571
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资金
- National Natural Science Foundation of China [11674079, 51802055]
We propose an industrial-grade liquid-crystal-based terahertz (THz) 2 pi-phase shifter with predictable ultra-high amplitude transmittance. The phase retardation reaches 360.5 degrees at 1.68 THz by analyzing the birefringence of liquid crystal (LC), and the amplitude transmittance in 0.3-1.5 THz is over 83%. More than 91.5% transmittance can be reached by decreasing the scattering of the THz wave in the dynamic deflection process of LC molecules, and that is close to the transmittance limit of quartz-based devices. This millimeter-thick phase shifter reaches full phase modulation and ultra-high transmittance in a broad THz band, is easy to be integrated in a quasi-optical system with a compact size and can be utilized as a wave plate, even an element in a THz phased array. (C) 2020 Optical Society of America
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