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Observation of ultraviolet whispering gallery modes in ZnMgO microrods
F. Bellarmine, Mamidanna S.Ramachandra Rao
Published in Elsevier B.V.
2019
Volume: 210
   
Pages: 404 - 407
Abstract
We report on the fabrication of ZnO and Zn 0.9 Mg 0.1 O microrods using nanoparticle assisted pulsed laser deposition (NAPLD). Micro-photoluminescence studies reveal that Zn 0.9 Mg 0.1 O microrods exhibited a blue shift in the ultraviolet (UV) emission relative to unintentionally doped ZnO that was attributed to the increase in bandgap due to Mg doping. High-resolution micro-photoluminescence clearly indicated the presence of whispering gallery modes (WGMs) for both ZnO and Zn 0.9 Mg 0.1 O. Transverse electric (TE) and transverse magnetic (TM) optical WGMs were identified using the existing plane-wave model. The observation of lower order WGM modes in Zn 0.9 Mg 0.1 O microrods may be of great interest for future UV WGM lasing. © 2019
About the journal
JournalData powered by TypesetJournal of Luminescence
PublisherData powered by TypesetElsevier B.V.
ISSN00222313
Open AccessNo
Concepts (16)
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    Blue shift
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    Ii-vi semiconductors
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    Optical resonators
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    Photoluminescence
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    Pulsed laser deposition
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    Pulsed lasers
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    Zinc oxide
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    High resolution
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    MICRO PHOTOLUMINESCENCE
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    NANOPARTICLE-ASSISTED PULSED-LASER DEPOSITIONS
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    NAPLD
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    PLANE WAVE
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    TRANSVERSE ELECTRICS
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    TRANSVERSE MAGNETIC
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    ULTRA-VIOLET
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    Whispering gallery modes