Design of a new asymmetric waveguide in InP-Based multi-quantum well laser
Publish place: International Journal of Nano Dimension، Vol: 11، Issue: 3
Publish Year: 1399
نوع سند: مقاله ژورنالی
زبان: English
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شناسه ملی سند علمی:
JR_IJND-11-3_003
تاریخ نمایه سازی: 17 خرداد 1401
Abstract:
Today, electron leakage in InP-based separate confinement laser diode has a serious effect on device performance. Control of electron leakage current is the aim of many studies in semiconductor laser industry. In this study, for the first time, a new asymmetric waveguide structure with n-interlayer for a ۱.۳۲۵ μm InP-based laser diode with InGaAsP multi-quantum well is proposed and theoretically analyzed using the PICS۳D simulation software. The simulator self-consistently combines the ۳D simulation of carrier transport, self-heating, and optical waveguiding. Through the simulation, the optical and electrical performances of laser diodes with symmetric and asymmetric waveguides are studied. Numerical simulation reveals that the asymmetric structure exhibits higher output light power, slope efficiency, emission intensity, and series resistance, as well as lower electron leakage and threshold current density under identical conditions, compared with the symmetric structure. The performances are greatly enhanced in the laser diode with asymmetric waveguide design because of the improved radiative stimulated recombination rate, declined non-radiative Auger recombination rate and decreased overlap between the optical wave and the p-doped layer.
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Authors
Zahra Danesh Kaftroudi
Department of Engineering Sciences, Faculty of Technology and Engineering East of Guilan, University of Guilan, Rudsar-Vajargah, Iran.
Abolfazl Mazandarani
Plasma & Nuclear Fusion Research School, Nuclear Science & Technology Research Institute, Tehran, Iran.
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