Growth of sparse arrays of narrow GaN nanorods hosting spectrally stable InGaN quantum disks

Yen Ting Chen*, Wen Che Tsai, Wen Yen Chen, Ching Lien Hsiao, Hsu Cheng Hsu, Wen-Hao Chang, Tzu Min Hsu, Kuei Hsien Chen, Li Chyong Chen

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

10 Scopus citations

Abstract

Wafer-scale production of single InGaN quantum disks (QD) ina-nanorod array with small rod diameter (> 9 nm) and low rod-density (< 108 cm 2) has been achieved without extensive processing steps. Excitation power-dependent μPL spectrum of single QD reveals multi-excitonic peak with 0.75 meV blue-shift for 3 orders of magnitude increasing power indicating the present system is spectrally stable and nearly free of quantum-confined Stark effects, due possibly to the strain relaxation induced by free surface of small rod diameters. The fully polarized emissions, a high working temperature (180 K), low rod density and good alignment, render this system promising as a potential quantum photon source.

Original languageEnglish
Pages (from-to)16166-16173
Number of pages8
JournalOptics Express
Volume20
Issue number15
DOIs
StatePublished - 16 Jul 2012

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