Selective excitation of Fabry-Perot or whispering-gallery mode-type lasing in GaN microrods

Hyeonjun Baek; Jerome K. Hyun; Kunook Chung; Hongseok Oh; Gyu Chul Yi

doi:10.1063/1.4902373

Selective excitation of Fabry-Perot or whispering-gallery mode-type lasing in GaN microrods

Hyeonjun Baek, Jerome K. Hyun, Kunook Chung, Hongseok Oh, Gyu Chul Yi

Chemistry & Nanoscience

Research output: Contribution to journal › Article › peer-review

35 Scopus citations

Abstract

Lasing from long semiconductor nanorods is dictated by Fabry-Perot (FP) resonances whereas that from large-diameter microrods is determined by whispering gallery modes (WGMs). Lengths and diameters intermediate between the two systems represent an important size regime for photonics and electronics, but have not been studied in detail. Here, we report on the detection of FP and WGM lasing emissions from a single GaN microrod, and demonstrate the ability to switch between the two lasing mechanisms by translating the excitation beam along the microrod. The competition between FP and WGM-type lasing was studied by finite-difference time-domain simulation and statistical analysis by measuring microrods of various diameters. Finally, control over the relative lasing intensities originating from either FPs or WGMs was demonstrated by tuning the polarization of the emission.

Original language	English
Article number	201108
Journal	Applied Physics Letters
Volume	105
Issue number	20
DOIs	https://doi.org/10.1063/1.4902373
State	Published - 17 Nov 2014

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title = "Selective excitation of Fabry-Perot or whispering-gallery mode-type lasing in GaN microrods",

abstract = "Lasing from long semiconductor nanorods is dictated by Fabry-Perot (FP) resonances whereas that from large-diameter microrods is determined by whispering gallery modes (WGMs). Lengths and diameters intermediate between the two systems represent an important size regime for photonics and electronics, but have not been studied in detail. Here, we report on the detection of FP and WGM lasing emissions from a single GaN microrod, and demonstrate the ability to switch between the two lasing mechanisms by translating the excitation beam along the microrod. The competition between FP and WGM-type lasing was studied by finite-difference time-domain simulation and statistical analysis by measuring microrods of various diameters. Finally, control over the relative lasing intensities originating from either FPs or WGMs was demonstrated by tuning the polarization of the emission.",

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T1 - Selective excitation of Fabry-Perot or whispering-gallery mode-type lasing in GaN microrods

AU - Baek, Hyeonjun

AU - Hyun, Jerome K.

AU - Chung, Kunook

AU - Oh, Hongseok

AU - Yi, Gyu Chul

PY - 2014/11/17

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N2 - Lasing from long semiconductor nanorods is dictated by Fabry-Perot (FP) resonances whereas that from large-diameter microrods is determined by whispering gallery modes (WGMs). Lengths and diameters intermediate between the two systems represent an important size regime for photonics and electronics, but have not been studied in detail. Here, we report on the detection of FP and WGM lasing emissions from a single GaN microrod, and demonstrate the ability to switch between the two lasing mechanisms by translating the excitation beam along the microrod. The competition between FP and WGM-type lasing was studied by finite-difference time-domain simulation and statistical analysis by measuring microrods of various diameters. Finally, control over the relative lasing intensities originating from either FPs or WGMs was demonstrated by tuning the polarization of the emission.

AB - Lasing from long semiconductor nanorods is dictated by Fabry-Perot (FP) resonances whereas that from large-diameter microrods is determined by whispering gallery modes (WGMs). Lengths and diameters intermediate between the two systems represent an important size regime for photonics and electronics, but have not been studied in detail. Here, we report on the detection of FP and WGM lasing emissions from a single GaN microrod, and demonstrate the ability to switch between the two lasing mechanisms by translating the excitation beam along the microrod. The competition between FP and WGM-type lasing was studied by finite-difference time-domain simulation and statistical analysis by measuring microrods of various diameters. Finally, control over the relative lasing intensities originating from either FPs or WGMs was demonstrated by tuning the polarization of the emission.

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Selective excitation of Fabry-Perot or whispering-gallery mode-type lasing in GaN microrods

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