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Optical waveguide and cavity effects on whispering-gallery mode resonances in a ZnO nanonail

Liu, Jinzhang, Ngo, Quang Minh, Park, Kyung Ho, Kim, Sangin, Ahn, YeongHwan, Park, Ji-Yong, Koh, Ken Ha, & Lee, Soonil (2009) Optical waveguide and cavity effects on whispering-gallery mode resonances in a ZnO nanonail. Applied Physics Letters, 95(22), p. 221105.

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Abstract

Spatially resolved cathodoluminescence (CL) study of a ZnO nanonail, having thin shank, tapered neck, and hexagonal head sections, is reported. Monochromatic imaging and line scan profiling indicate that the wave guiding and leaking from growth imperfections in addition to the oxygen deficiency variation determine the spatial contrast of CL emissions. Occurrence of resonance peaks at identical wavelengths regardless of CL-excitation spots is inconsistent with the whispering-gallery mode (WGM) resonances of a two-dimensional cavity in the finite difference time domain simulation. However, three dimensioanl cavity simulation produced WGM peaks that are consistent with the experimental spectra, including transverse-electric resonances that are comparable to transverse-magnetic ones.

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8 citations in Scopus
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10 citations in Web of Science®

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ID Code: 46050
Item Type: Journal Article
Keywords: ZnO , Optical cavity , Wispering Gallery Mode, FDTD simulation, Resonances
DOI: 10.1063/1.3268806
ISSN: 0003-6951
Subjects: Australian and New Zealand Standard Research Classification > MATHEMATICAL SCIENCES (010000) > NUMERICAL AND COMPUTATIONAL MATHEMATICS (010300) > Numerical Analysis (010301)
Australian and New Zealand Standard Research Classification > PHYSICAL SCIENCES (020000) > OPTICAL PHYSICS (020500) > Photonics Optoelectronics and Optical Communications (020504)
Australian and New Zealand Standard Research Classification > PHYSICAL SCIENCES (020000) > OPTICAL PHYSICS (020500) > Optical Physics not elsewhere classified (020599)
Australian and New Zealand Standard Research Classification > ENGINEERING (090000) > MATERIALS ENGINEERING (091200) > Compound Semiconductors (091203)
Divisions: Past > QUT Faculties & Divisions > Faculty of Built Environment and Engineering
Past > Schools > School of Engineering Systems
Copyright Owner: Copyright 2009 American Institute of Physics
Deposited On: 20 Sep 2011 09:30
Last Modified: 22 Sep 2011 11:35

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