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Efficient Guided-Mode-Resonant Tunable Color Filters

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2 Author(s)
Mohammad Jalal Uddin ; Department of Electrical Engineering, University of Texas-Arlington, Arlington, TX, USA ; Robert Magnusson

A new angle-tuned guided-mode resonance color filter is experimentally demonstrated. The device is designed using numerical methods and patterned using laser interferometric lithography. It consists of a 55-nm-deep silicon nitride and air diffraction grating with a 270-nm grating period along with a 110-nm-thick silicon nitride waveguide layer deposited on a glass substrate. The fabricated filter exhibits blue, green, and red color responses at incident angles of 8 ^{\circ} , 20 ^{\circ} , and 35 ^{\circ} , respectively. It has a bandwidth of 10 nm with efficiency near 90%.

Published in:

IEEE Photonics Technology Letters  (Volume:24 ,  Issue: 17 )