標題: TUNABLE TERAHERTZ WAVELENGTH SELECTOR DEVICE USING MAGNETICALLY CONTROLLED BIREFRINGENCE OF LIQUID CRYSTALS
作者: Chao, Ru-Pin
Pan, Ci-Ling
Chen, Chao-Yuan
公開日期: 1-Jan-2009
摘要: The present invention provides a tunable terahertz (THz) wavelength selector device, which includes a fixed phase retarder, a tunable phase retarder and a pair of linear polarizers to form a unit. The fixed phase retarder and tunable phase retarder basically utilizes liquid crystals to provide phase retardation, moreover, utilizing birefringence phenomenon possessed by liquid crystals can provide adequate phase retardation. The fixed phase retarder utilizes horizontal orientation of liquid crystal cell to provide fixed phase retardation, while the tunable phase retarder however utilizes homeotropic liquid crystal cell and a rotatable magnet to provide a tunable phase retardation, wherein the tunable phase retarder can provide the positive or negative phase retardation relative to the fixed phase retarder, based on the direction of the magnet's rotating axes and totally use the entire tunable range into adjusting frequencies which can pass through. Besides, the present invention can also serially connect multiple units described above so as to achieve a narrow enough band-pass bandwidth.
官方說明文件#: G02F001/137
URI: http://hdl.handle.net/11536/105557
專利國: USA
專利號碼: 20090002581
Appears in Collections:Patents


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  1. 20090002581.pdf