Growth of sparse arrays of narrow GaN nanorods hosting spectrally stable InGaN quantum disks
Journal
Optics Express
Journal Volume
20
Journal Issue
15
Pages
16166-16173
Date Issued
2012
Author(s)
Chen, Y.-T.
Tsai, W.-C.
Chen, W.-Y.
Hsiao, C.-L.
Hsu, H.-C.
Chang, W.-H.
Hsu, T.-M.
Chen, K.-H.
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. ©2012 Optical Society of America.
Publisher
Optical Society of American (OSA)
Type
journal article