Polarization-independent phase modulation using a polymer-dispersed liquid crystal

Hongwen Ren; Yi-Hsin Lin; Yun-Hsing Fan; Shin-Tson Wu
April 2005
Applied Physics Letters;4/4/2005, Vol. 86 Issue 14, p141110
Academic Journal
Polarization-independent phase-only modulation of a polymer-dispersed liquid crystal (PDLC) is demonstrated. In the low voltage region, PDLC is translucent because of light scattering. Once the voltage exceeds a saturation level, PDLC is highly transparent and exhibits phase-only modulation capability. Although the remaining phase is not too large, it is still sufficient for making adaptive microdevices, such as microlens. A tunable-focus microlens for arrays using PDLC is demonstrated. This kind of microlens is scattering free, polarization independent, and has fast response time.


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