Journal
OPTICS EXPRESS
Volume 22, Issue 17, Pages 20038-20044Publisher
OPTICAL SOC AMER
DOI: 10.1364/OE.22.020038
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Funding
- DARPA SWEEPER Program [HR0011-10-2-0002]
- National Natural Science Foundation of China (NSFC) [61320106001]
- State Key Laboratory of Advanced Optical Communication Systems and Networks, China
- Guggenheim Fellowship (CCH)
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We report a high speed 8x8 optical phased array using tunable 1550 nm all-pass filters with ultrathin high contrast gratings (HCGs) as the microelectromechanical-actuated top reflectors. The all-pass filter design enables a highly efficient phase tuning (1.7 pi) with a small actuation voltage (10 V) and actuation displacement of the HCG (50 nm). The microelectromechanical HCG structure facilitates a high phase tuning speed >0.5 MHz. Beam steering is experimentally demonstrated with the optical phased array. (C)2014 Optical Society of America
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