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- W4321262963 abstract "Chiral smectic liquid crystal devices are currently used for modulation of complex amplitude, intensity, polarization, and wavelength. For phase-only modulation, both surface stabilized smectic A * and smectic C* devices are characterized by two-level absolute phase, with no intrinsic analog phase capability. Therefore, multiplelevel phase must be achieved by using cascaded single-pass phase shifters. 1 It is most attractive, however, to achieve adequate phase modulation by using a single active layer. A method analogous to the Fox 2 rotating phase shifter can be implemented by using surface stabilized devices, with the potential for analog phase by using smectic A* materials. This technique was also described by Pancharatnam 3 for producing a variable retardation at optical frequencies. We describe a novel reflection-mode phase modulator that utilizes rapid switching smectic A * material to achieve analog phaseonly switching. As the induced phase is twice the reorientation angle of the molecular director, a 2π analog phase requires an unrealistic tilt angle. This problem is overcome by using a resonator structure 4 to enhance the phase modulation depth." @default.
- W4321262963 created "2023-02-18" @default.
- W4321262963 creator A5023871399 @default.
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- W4321262963 date "1992-01-01" @default.
- W4321262963 modified "2023-10-16" @default.
- W4321262963 title "Chiral smectic liquid crystal optical phase modulator" @default.
- W4321262963 cites W188983850 @default.
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- W4321262963 doi "https://doi.org/10.1364/oam.1992.tuee7" @default.
- W4321262963 hasPublicationYear "1992" @default.
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