AlGaN/GaN asymmetric graded-index separate confinement heterostructures designed for electron-beam pumped UV lasers - Archive ouverte HAL Access content directly
Journal Articles Optics Express Year : 2021

AlGaN/GaN asymmetric graded-index separate confinement heterostructures designed for electron-beam pumped UV lasers

Abstract

We present a study of undoped AlGaN/GaN separate confinement heterostructures designed to operate as electron beam pumped ultraviolet lasers. We discuss the effect of spontaneous and piezoelectric polarization on carrier diffusion, comparing the results of cathodoluminescence with electronic simulations of the band structure and Monte Carlo calculations of the electron trajectories. Carrier collection is significantly improved using an asymmetric graded-index separate confinement heterostructure (GRINSCH). The graded layers avoid potential barriers induced by polarization differences in the heterostructure and serve as strain transition buffers which reduce the mosaicity of the active region and the linewidth of spontaneous emission.
Fichier principal
Vignette du fichier
oe-29-9-13084.pdf (5.72 Mo) Télécharger le fichier
Origin : Publisher files allowed on an open archive

Dates and versions

hal-03168197 , version 1 (25-05-2021)

Identifiers

Cite

Sergi Cuesta, Yoann Curé, Fabrice Donatini, Lou Denaix, Edith Bellet-Amalric, et al.. AlGaN/GaN asymmetric graded-index separate confinement heterostructures designed for electron-beam pumped UV lasers. Optics Express, 2021, 29 (9), pp.13084-13093. ⟨10.1364/OE.424027⟩. ⟨hal-03168197⟩
135 View
21 Download

Altmetric

Share

Gmail Facebook X LinkedIn More