Analysis of diffraction efficiency of TI-PLM and its potential in beam steering
AffiliationJames C. Wyant College of Optical Sciences, University of Arizona
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CitationLuo, C., Guan, J., Deng, X., & Takashima, Y. (2021). Analysis of diffraction efficiency of TI-PLM and its potential in beam steering. Proceedings of SPIE - The International Society for Optical Engineering.
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AbstractA concept of Texas Instrument (TI)-Phase-only Spatial Light Modulator (PLM) is reported which utilizing the dynamic piston motion of PLM pixels to form a discretized blazed grating. By fully manipulating the piston motion of pixels and increasing the available discretization level of the quasi-blazed grating, the Diffraction Efficiency (DE) can achieve close to 99%, which qualifies PLM an ideal candidate for beam steering functionality combining with its MEMS based high refresh rate and large aperture. The DE of the discretized blazed grating is proven to have 86% with 633 nm monochromatic light incident at 25° with 16 discretization levels and 2 round-Trip phase modulation by RCWA algorithm. Furthermore, additional factors which lead to the degradation of diffraction efficiency is also analyzed. © COPYRIGHT SPIE. Downloading of the abstract is permitted for personal use only.
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