NDLI: Carrier Transport and Optical Properties of InGaN SQW With Embedded AlGaN<tex>$delta$</tex>-Layer

Content Provider	IEEE Xplore Digital Library
Author	Jongwoon Park Kaneta, A. Funato, M. Kawakami, Y.
Copyright Year	1965
Abstract	We investigate the carrier transport and optical properties of a thick InGaN single quantum well (SQW) where an AlGaN delta-layer is embedded. By way of simulation, it is found that the carrier density distribution in the active region is more uniform in such a QW structure, compared to a double QW (DQW) configuration showing a discontinuity in the hole quasi-Fermi level due to the large effective mass of the holes along with the strong piezoelectric field. Through the photoluminescence (PL) measurements, we have shown that the PL peak energy varies depending sensitively on the delta-layer thickness, providing an extra degree of freedom in the wavelength-tuning control. In particular, such a QW structure is highly desired for long-wavelength emission as the wavelength tuning can be achieved with lower indium composition. The embedded delta-layer also increases the wave function overlap between holes and electrons, thereby shortening the PL lifetime. The results of PL measurements are shown to be consistent with the self-consistent numerical results. A possible application of the proposed QW structure is to the design of long-wavelength light-emitting diodes and laser diodes
Sponsorship	IEEE Lasers and Electro-Optics Society
Starting Page	1023
Ending Page	1030
Page Count	8
File Size	490771
File Format	PDF
ISSN	00189197
Volume Number	42
Issue Number	10
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2006-10-01
Publisher Place	U.S.A.
Access Restriction	One Nation One Subscription (ONOS)
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Aluminum gallium nitride Optical sensors Wavelength measurement Charge carrier density Effective mass Photoluminescence Energy measurement Thickness measurement Thickness control Laser tuning wave function AlGaN carrier transport delta layer InGaN photoluminescence piezoelectric charge
Content Type	Text
Resource Type	Article
Subject	Atomic and Molecular Physics, and Optics Condensed Matter Physics Electrical and Electronic Engineering

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