Polarization-insensitive wavelength selection in an axially symmetric liquid-crystal Fabry-Perot filter

1999 ◽  
Vol 75 (6) ◽  
pp. 859-861 ◽  
Author(s):  
Ju-Hyun Lee ◽  
Hak-Rin Kim ◽  
Sin-Doo Lee
Keyword(s):  
Liquid Crystal ◽  
Axially Symmetric ◽  
Wavelength Selection ◽  
Fabry Perot ◽  
Polarization Insensitive

scholarly journals 58.3: Polarization-Insensitive Liquid-Crystal Fabry-Perot Tunable Optical Filter

2004 ◽  
Vol 35 (1) ◽  
pp. 1530 ◽  
Author(s):  
T. Kataoka ◽  
S. E. Day ◽  
D. R. Selviah ◽  
A. Fernández
Keyword(s):  
Liquid Crystal ◽  
Optical Filter ◽  
Tunable Optical Filter ◽  
Fabry Perot ◽  
Polarization Insensitive

scholarly journals Design of a Liquid-Crystal-Tunable Terahertz Demultiplexer Based on a Metal-Insulator-Metal Waveguide

2019 ◽  
Vol 9 (4) ◽  
pp. 644
Author(s):  
Xue-Shi Li ◽  
Naixing Feng ◽  
Yuan-Mei Xu ◽  
Liang-Lun Cheng ◽  
Qing Liu
Keyword(s):  
Liquid Crystal ◽  
Electric Field ◽  
Metal Insulator ◽  
Resonance Modes ◽  
External Bias ◽  
Bias Electric Field ◽  
Metal Waveguide ◽  
Metal Insulator Metal ◽  
Fabry Perot ◽  
Mim Waveguide

A tunable demultiplexer with three output channels infiltrated by liquid crystal (LC) is presented, which is based on a metal-insulator-metal (MIM) waveguide. The operating frequencies of the three output channels can be tuned simultaneously at will by changing the external bias electric field applied to the LC. By analyzing the Fabry-Pérot (FP) resonance modes of the finite-length MIM waveguide both theoretically and numerically, the locations of the three channels are delicately determined to achieve the best demultiplexing effects. Terahertz (THz) signals input from the main channel can be demultiplexed by channels 1, 2 and 3 at 0.7135 THz, 1.068 THz and 1.429 THz, respectively. By applying an external electric field to alter the tilt angle of the infiltrating LC material, the operating frequencies of channels 1, 2 and 3 can be relatively shifted up to 12.3%, 9.6% and 9.7%, respectively. The designed demultiplexer can not only provide a flexible means to demultiplex signals but also tune operating bands of output channels at the same time.

MWIR/LWIR filter based on Liquid–Crystal Fabry–Perot structure for tunable spectral imaging detection

2015 ◽  
Vol 69 ◽  
pp. 68-73 ◽  
Author(s):  
Huaidong Zhang ◽  
Afzal Muhammad ◽  
Jun Luo ◽  
Qing Tong ◽  
Yu Lei ◽  
...  
Keyword(s):  
Liquid Crystal ◽  
Spectral Imaging ◽  
Fabry Perot ◽  
Imaging Detection
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