Jpn. J. Appl. Phys. 44 (2005) pp. 2913-2920 |Previous Article| |Next Article| |Table of Contents|
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AlGaAs/GaAs NpnP Depleted Optical Thyristor Using Bottom Mirror Layers
Woon Kyung Choi,
Doo Gun Kim,
Young Wan Choi,
Seok Lee1,
Deok Ha Woo1 and
Sun Ho Kim1
Laboratory of Optoelectronics and Optical Communications, School of Electrical and Electronic Engineering, Chung-Ang University, 221 Heuksuk-dong, Dongjak-ku, Seoul 156-756, Korea
1Photonics Research Center, Korea Institute of Science and Technology, P.O. Box 131, Cheongryang, Seoul 130-650, Korea
(Received January 28, 2004; revised November 1, 2004; accepted December 21, 2004; published May 10, 2005)
A novel fully depleted optical thyristor (DOT) using quarter wavelength reflector stacks (QWRS) is proposed. QWRS are employed as bottom mirrors to enhance the emission efficiency as well as optical sensitivity. To analyze their switching characteristics, s-shapes nonlinear current–voltage curves were simulated and the reverse full-depletion voltages (Vnegs) of DOTs were obtained as a function of semiconductor parameters using a finite difference method associated with a current-oriented method. The fabricated DOTs show sufficient nonlinear s-shaped current–voltage (I–V) characteristics, and switching voltage changes with and without bottom mirrors are 1.82 V and 1.52 V, respectively. Compared to a conventional DOT, this device with the bottom mirror shows about 20% and 20–50% enhancement in switching voltage changes and spontaneous emission efficiency, respectively.
URL:
http://jjap.jsap.jp/link?JJAP/44/2913/
DOI: 10.1143/JJAP.44.2913
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