Browsing by Author "Lai, Kuo-Wei"

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Selecting detection wavelength of resonant cavity-enhanced photodetectors by guided-mode resonance reflectors
(2012-02-13)
Lai, Kuo-Wei
;
Lee, Yi-Shan
;
Fu, Ying-Jhe
;
Lin, Sheng-Di
;
電子工程學系及電子研究所
We propose and demonstrate a novel device structure of resonant cavity-enhanced photodetector (RCE-PD). The new RCE-PD structure consists of a bottom distributed Bragg reflector (DBR), a cavity with InGaAs multiple quantum wells (MQWs) for light absorption and a top mirror of sub-wavelength grating. By changing the fill factor of the 2-D grating, the effective cavity length of RCE-PDs can be varied so the resonant wavelength can be selected post growth. Accordingly, we can fabricate an array of PDs on a single chip, on which every PD aims for a specific wavelength. (C) 2012 Optical Society of America