NDLI: Suspended p–n Junction InGaN/GaN Multiple-Quantum-Well Device With Selectable Functionality

Content Provider	IEEE Xplore Digital Library
Author	Xin Li Gangyi Zhu Xumin Gao Dan Bai Xiaoming Huang Xun Cao Hongbo Zhu Hane, K. Yongjin Wang
Copyright Year	2009
Abstract	We demonstrate optoelectronic devices implemented on suspended p-n junction InGaN/GaN multiple quantum wells (MQWs) for the further monolithic integration of an optical source, a waveguide, and a photodetector on the same GaN-on-silicon wafer. The fabricated suspended membrane device exhibits selectable functionalities either for efficient light-emitting diodes (LEDs) or sensitive photodetectors. Typical current-voltage (I-V) characteristics are obtained for the device operated under the LED mode, and the emitted light intensity is effectively modulated by the applied voltage. Lateral in-plane propagation of emitted light in a suspended membrane is experimentally presented. The simulation results show that the thickness-dependent optical performance can be tuned by back wafer thinning for epitaxial films. The device operated under the photodetector mode exhibits a static photocurrent on-off ratio η_s of 2.25 × 10⁵ at a 1-V bias voltage with the illumination power of 690 μW and the wavelength of 450 nm. The photocurrent also shows a rectangular pulse response of the same duration as a 1-s rectangular illumination pulse at a 0-V bias voltage with the illumination power of 1 mW. The temporal photocurrent on-off ratio η_t is around 1.01 × 10⁵. This paper opens a promising way to realize the monolithic integration of a LED, a waveguide, and a photodetector on a GaN-on-silicon platform.
Starting Page	1
Ending Page	7
Page Count	7
File Size	678837
File Format	PDF
ISSN	19430655
Volume Number	7
Issue Number	6
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2015-01-01
Publisher Place	U.S.A.
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Photodetectors Light emitting diodes Gallium nitride Lighting Quantum well devices P-n junctions Silicon Photodetector Thin film devices and applications Light-emitting diodes photodetector light-emitting diodes (LEDs)
Content Type	Text
Resource Type	Article
Subject	Atomic and Molecular Physics, and Optics Electrical and Electronic Engineering

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