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Real-Time Angular Sensitivity Compensation of Guided-Mode Resonance Filter

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6 Author(s)
Banglian Xu ; Department of Engineering Research Center of Optical Instrument and System, Ministry of Education and Shanghai Key Laboratory of Modern Optical System, University of Shanghai for Science and Technology, Shanghai, China ; Dawei Zhang ; Yuanshen Huang ; Qi Wang
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Guided-mode resonant filters (GMRFs) are promising narrowband filters with high peak efficiency, but their practical applications have been restricted by their natural high angular sensitivity. We investigated the influence of incident angle and azimuthal angle on the spectral response of GMRF, and found that the resonant peaks are mainly influenced by the incident angle. A polymer-dispersed liquid crystal layer was introduced to compensate the shift of resonant wavelength through applying proper voltage in real time, and numerical results show that a large angular compensation range of about ±4.2° can be obtained while maintaining high performance of the spectral response.

Published in:

IEEE Photonics Technology Letters  (Volume:26 ,  Issue: 3 )