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AlGaN-Based Lateral Current Injection Laser Diodes Using Regrown Ohmic Contacts

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6 Author(s)
Satter, M.M. ; Sch. of Electr. & Comput. Eng., Georgia Inst. of Technol., Atlanta, GA, USA ; Lochner, Z. ; Jae-Hyun Ryou ; Shyh-Chiang Shen
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A lateral current injection (LCI) design for AlGaN deep-ultraviolet edge-emitting laser diodes (LDs) on AlN substrates is presented. Two-dimensional optoelectronic simulation predicts lasing at a wavelength of 290 nm. Unlike vertical current injection designs, LCI designs can take advantage of narrow-bandgap p-type contact layers with minimal impact on the optical confinement factor through a partial decoupling of the problems of optical confinement and electrical injection. With polarization-charge-matched quantum well barriers, a large number of quantum wells can be used in LCI designs, which not only enhances the optical confinement factor but also distributes joule heating over a large volume. This is the first theoretical investigation of an LCI LD design in the III-V nitride material system.

Published in:

Photonics Technology Letters, IEEE  (Volume:25 ,  Issue: 3 )

Date of Publication:

Feb.1, 2013

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