Polarized photoluminescence from single GaN nanorods: effects of optical confinement

Optics Express
Hung-Ying ChenShangjr Gwo

Abstract

By measuring linearly polarized photoluminescence (PL) from single, isolated gallium nitride (GaN) nanorods with the rod diameters in the subwavelength regime (30-90 nm), we present clear evidence for size dependence of polarization anisotropy. The maximum polarization ratio at room temperature (approximately 0.9 with emission and excitation light polarized parallel to the long axis of nanorod) occurs at the rod diameter of approximately 40 nm. The experimental data are compared with the recent theoretical model proposed for thick semiconductor nanowires. It is concluded that the optical confinement effects in this size regime play an important role in the observed giant polarization anisotropy. Furthermore, we have performed a temperature-dependent study of polarized PL to show the importance of internal emission anisotropy at low temperatures.

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Citations

Aug 23, 2011·Nanoscale Research Letters·Gwenole JacopinMaria Tchernycheva
Jun 5, 2015·Nano Letters·Dick van DamJaime Gómez Rivas
Jan 13, 2015·Nano Letters·Marta De LucaAntonio Polimeni
Jun 28, 2014·Nano Letters·M De LucaM Capizzi
Dec 23, 2010·Journal of the American Chemical Society·Chun-Hong KuoMichael H Huang
Jun 27, 2017·Nature Nanotechnology·Jongwook KimThierry Gacoin
Jul 18, 2012·Nanotechnology·G JacopinM Tchernycheva
May 29, 2018·Scientific Reports·Youngsin ParkHyunsik Im
Feb 15, 2012·Optics Express·Cheng-Ying ChenJr-Hau He
Mar 31, 2021·Nature Communications·Jeongmo KimThierry Gacoin
Nov 9, 2021·Chemical Reviews·Zhiwei LiYadong Yin

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