Optical properties of arrays of hexagonal GaN microdisks acting as whispering-gallery-mode-type optical microcavities

The optical properties of arrays of hexagonal GaN microdisks, which potentially act as whispering‐gallery‐mode‐type optical microcavities, were investigated. The arrays were fabricated from a GaN film using a top–down process, and the side lengths and height of the hexagonal GaN microdisks were appr...

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Bibliographic Details
Published in:Physica status solidi. A, Applications and materials science Applications and materials science, 2015-05, Vol.212 (5), p.1017-1020
Main Authors: Kouno, Tetsuya, Suzuki, Sho, Kishino, Katsumi, Sakai, Masaru, Yamano, Kouji, Yanagihara, Ai, Hara, Kazuhiko
Format: Article
Language:English
Subjects:
Arrays
Finite difference method
Gallium nitrides
GaN
Lasing
Mathematical analysis
Microcavities
microdisks
optical microcavities
Optical properties
Two dimensional
whispering-gallery modes
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Summary:The optical properties of arrays of hexagonal GaN microdisks, which potentially act as whispering‐gallery‐mode‐type optical microcavities, were investigated. The arrays were fabricated from a GaN film using a top–down process, and the side lengths and height of the hexagonal GaN microdisks were approximately 1.5 and 500 nm, respectively. The microdisk arrays exhibited optically pumped lasing actions. The estimated lasing intensities which were obtained from one microdisk in the arrays were related to the period of the arrays. We discuss the optical properties of the microdisk arrays in view of experimental results and numerical analyses obtained using a two‐dimensional finite‐difference time‐domain method.
ISSN:1862-6300
1862-6319
DOI:10.1002/pssa.201431651