Near-UV optical cavities in Ga2O3 nanowires

In this Letter, we report optical confinement in the near-ultraviolet (near-UV) range in Ga2O3 nanowires (NWs) by distributed Bragg reflector (DBR) nanopatterned cavities. High-contrast DBRs, which act as the end mirrors of the cavities of the desired length, are designed and fabricated by focused i...

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Published in:Optics letters 2021-01, Vol.46 (2), p.278-281
Main Authors: Alonso-Orts, Manuel, Chilla, Gerwin, Hötzel, Rudolfo, Nogales, Emilio, San Juan, José M, Nó, María L, Eickhoff, Martin, Méndez, Bianchi
Format: Article
Language:English
Subjects:
Emitters
Gallium oxides
Ion beams
Nanowires
Photoluminescence
Ultraviolet radiation
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container_end_page 281
container_issue 2
container_start_page 278
container_title Optics letters
container_volume 46
creator Alonso-Orts, Manuel
Chilla, Gerwin
Hötzel, Rudolfo
Nogales, Emilio
San Juan, José M
Nó, María L
Eickhoff, Martin
Méndez, Bianchi
description In this Letter, we report optical confinement in the near-ultraviolet (near-UV) range in Ga2O3 nanowires (NWs) by distributed Bragg reflector (DBR) nanopatterned cavities. High-contrast DBRs, which act as the end mirrors of the cavities of the desired length, are designed and fabricated by focused ion beam etching. The resonant modes of the cavities are analyzed by micro-photoluminescence measurements, analytical models, and simulations, which show very good agreement between each other. Experimental reflectivities up to 50% are obtained over the 350–410 nm region for the resonances in this wavelength range. Therefore, Ga2O3 NW optical cavities are shown as good candidates for single-material-based near-UV light emitters.
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subjects Emitters
Gallium oxides
Ion beams
Nanowires
Photoluminescence
Ultraviolet radiation
title Near-UV optical cavities in Ga2O3 nanowires
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