Enhancement of InGaN Quantum Well Photoluminescence in a Tamm Metal/Porous-DBR Micro-Cavity

Andrei Sarua*, Jon Pugh, Edmund Harbord, Martin Cryan

*Corresponding author for this work

Research output: Contribution to journalArticle (Academic Journal)peer-review

Abstract

Impact Statement:
This work demonstrates experimental observation of enhancement photoluminescence emission from InGaN/GaN quantum wells in blue-green region by a hybrid Ag metal Tamm plasmon porous-GaN DBR micro-cavity. This paves the way for a realisation of efficient vertically emitting device structures such as LED and VCSELs in blue-green-yellow region based on GaN material.

Abstract:
Vertical cavity surface emitting lasers (VCSEL) are of great interest for photonic and telecom applications, however challenges in fabrication of efficient VSCEL GaN devices are yet to be resolved. In this work we present a study of micro-photoluminescence (PL) emission from a novel InGaN quantum well (QW) emitting structure with integrated micro-cavity, which can be used for VCSEL applications. The micro-cavity exhibiting Tamm plasmon optical states is formed by a porous GaN distributed Bragg reflector (DBR) bottom mirror and top plasmonic silver metal mirror. Results of PL, Fourier imaging spectroscopy and finite-difference time-domain simulations are presented and discussed. An estimated 8.5 times enhancement of QW PL intensity at around 480–500 nm and a red-shift of QW peak emission is attributed to the Tamm plasmon resonance in the cavity at around 514 nm.
Original languageEnglish
Article number4800307
Number of pages7
JournalIEEE Photonics Journal
Volume15
Issue number5
Early online date18 Aug 2023
DOIs
Publication statusPublished - 1 Oct 2023

Structured keywords

  • Photonics and Quantum

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