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Erschienen in: Journal of Materials Science 11/2019

06.03.2019 | Electronic materials

Strong exciton–photon coupling and polariton lasing in GaN microrod

verfasst von: Poulami Ghosh, Dapeng Yu, Tao Hu, Jing Liang, Zhanghai Chen, Liu Yingkai, Mingyuan Huang

Erschienen in: Journal of Materials Science | Ausgabe 11/2019

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Abstract

We report on the studies of strong exciton photon coupling and polariton lasing at room temperature from single GaN microrods grown by metal-organic vapor phase epitaxy technique. Emission spectra were recorded at room temperature by exciting GaN microrods with pulsed Nd:YAG laser of 355 nm wavelength at different excitation power density. Clear mode formation corresponding to Whispering gallery modes in GaN microrod cavity has been observed. Strong exciton–photon coupling as well as large Rabi splitting energy of maximum 400 ± 40 meV has been observed from the microrods. This is attributed to the formation of new quasi-particles named polaritons with much lighter mass than free electron mass. Among those polariton modes, one of the modes increases super linearly with the increase in excitation power density which is an indication of polariton lasing.

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Metadaten
Titel
Strong exciton–photon coupling and polariton lasing in GaN microrod
verfasst von
Poulami Ghosh
Dapeng Yu
Tao Hu
Jing Liang
Zhanghai Chen
Liu Yingkai
Mingyuan Huang
Publikationsdatum
06.03.2019
Verlag
Springer US
Erschienen in
Journal of Materials Science / Ausgabe 11/2019
Print ISSN: 0022-2461
Elektronische ISSN: 1573-4803
DOI
https://doi.org/10.1007/s10853-019-03493-w

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