Abstract

Whispering gallery modes in ZnO nanorods with equilateral triangular cross sections were studied for the first time, to our knowledge. Photoluminescence following excitation with $325\mathrm{nm}$ radiation was observed at discrete wavelengths and thereby indicated the excitation of whispering gallery modes of triangular ZnO nanorod resonators. These resonances extended over both the visible emission band and the ultraviolet emission band of ZnO. The refractive index of ZnO between $2\mathrm{eV}$ and $3.2\mathrm{eV}$ was calculated assuming a “folded” whispering gallery mode and a simple plane-wave model. Our analysis shows that the plane-wave model produces a dispersion curve that agrees well with that of bulk ZnO for large nanorods but shows small deviations when the size of the nanorod resonator approaches the wavelength of the emitted light.

© 2009 Optical Society of America

Frequency-upconverted whispering-gallery-mode lasing in ZnO hexagonal nanodisks

Chunfeng Zhang, Fan Zhang, Xiao Wei Sun, Yi Yang, Jian Wang, and Jian Xu
Opt. Lett. 34(21) 3349-3351 (2009)

Quasi-whispering gallery modes of exciton-polaritons in a ZnO microrod

Liaoxin Sun, Hongxing Dong, Wei Xie, Zhenghua An, Xuechu Shen, and Zhanghai Chen
Opt. Express 18(15) 15371-15376 (2010)

Whispering gallery modes in triple microdisks of triangular configurations

Jung-Wan Ryu and Sunghwan Rim
J. Opt. Soc. Am. B 37(8) 2382-2387 (2020)

Interrogation of whispering-gallery modes resonances in cylindrical microcavities by backreflection detection

Vanessa Zamora, Antonio Díez, Miguel V. Andrés, and Benito Gimeno
Opt. Lett. 34(7) 1039-1041 (2009)

Electrically driven whispering-gallery-mode microlasers in an n-MgO@ZnO:Ga microwire/p-GaN heterojunction

Xiangbo Zhou, Mingming Jiang, Junfeng Wu, Maosheng Liu, Caixia Kan, and Daning Shi
Opt. Express 30(11) 18273-18286 (2022)