Electrically manipulating the optical sensitivity function in quantum wells for nanoacoustic wave detection

Pei-Hsun Wang; Yu-Chieh Wen; Shi-Hao Guol; Chih-Ming Lai; Hung-Cheng Lin; Peng-Ren Chen; Jin-Wei Shi; Jen-Inn Chyi; Chi-Kuang Sun
October 2009
Applied Physics Letters;10/5/2009, Vol. 95 Issue 14, p143108
Academic Journal
We demonstrate electrical control of the optical sensitivity function in multiple quantum wells (MQWs) for nanoacoustic wave detection. This is realized by bias controlling the quantized level and the quasi-Fermi level of carrier-populated InGaN/GaN MQWs. Experimentally, a strongly bias-dependent optical sensitivity was observed when the optical probe transition was near the quasi-Fermi level, which agrees well with the theoretical prediction.


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