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High optical responsivity of InAlAs-InGaAs metamorphic high-electron mobility transistor on GaAs substrate with composite channels

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8 Author(s)
Choi, C.-S. ; Dept. of Electr. & Electron. Eng., Yonsei Univ., Seoul, South Korea ; Kang, H.-S. ; Woo-Young Choi ; Kim, H.-J.
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The high optical responsivity of the InAlAs-InGaAs metamorphic high-electron mobility transistor on GaAs substrate with composite channels is reported. Experimental results verify that the photovoltaic effect causing the effective decrease of threshold voltage is responsible for the photoresponse to a 1.55-μm optical illumination.

Published in:

Photonics Technology Letters, IEEE  (Volume:15 ,  Issue: 6 )