Abstract

Experimental observation and theoretical analysis of the whispering gallery mode (WGM) related emission spectra of ZnO microrods with a hexagonal cross-section are reported. ZnO microrods of various sizes are fabricated, and their individual geometric information (including the inner radius, edge profile modification, and tilt angle) are characterized via scanning electron microscopy (SEM). The photoluminescence spectra in the visible range (with energies between 1.77 and 2.76 eV) are compared with theoretical simulation based on Green function calculation within a nearly complete set of basis functions. WGM resonance peaks for TE and TM modes of five different sizes of microrods are analyzed. By using the SEM determined geometry with a slight adjustment, we obtain realistic simulation of the line shapes of the emission spectra, which agree well with experimental observation. To gain better understanding of the WGM resonance modes, we also calculate the WGM resonance profile of ZnO microrods with the cylindrical cross-section for both TE and TM modes for comparison.

© 2018 Optical Society of America

Full Article  |  PDF Article
OSA Recommended Articles
Optical properties of ZnO microrods grown by a hydrothermal method – a cathodoluminescence study

Agnieszka Pieniążek, Bartłomiej S. Witkowski, Anna Reszka, Marek Godlewski, and Bogdan J. Kowalski
Opt. Mater. Express 6(12) 3741-3750 (2016)

Optical cavity modes of a single crystalline zinc oxide microsphere

Rakesh Singh Moirangthem, Pi-Ju Cheng, Paul Ching-Hang Chien, Buu Trong Huynh Ngo, Shu-Wei Chang, Chung-Hao Tien, and Yia-Chung Chang
Opt. Express 21(3) 3010-3020 (2013)

Size and morphology dependent evolution of resonant modes in ZnO microspheres grown by hydrothermal synthesis

Trong Huynh-Buu Ngo, Ching-Hang Chien, Shang-Hsuan Wu, and Yia-Chung Chang
Opt. Express 24(14) 16010-16015 (2016)

References

You do not have subscription access to this journal. Citation lists with outbound citation links are available to subscribers only. You may subscribe either as an OSA member, or as an authorized user of your institution.

Contact your librarian or system administrator
or
Login to access OSA Member Subscription

Cited By

You do not have subscription access to this journal. Cited by links are available to subscribers only. You may subscribe either as an OSA member, or as an authorized user of your institution.

Contact your librarian or system administrator
or
Login to access OSA Member Subscription

Figures (7)

You do not have subscription access to this journal. Figure files are available to subscribers only. You may subscribe either as an OSA member, or as an authorized user of your institution.

Contact your librarian or system administrator
or
Login to access OSA Member Subscription

Tables (2)

You do not have subscription access to this journal. Article tables are available to subscribers only. You may subscribe either as an OSA member, or as an authorized user of your institution.

Contact your librarian or system administrator
or
Login to access OSA Member Subscription

Equations (42)

You do not have subscription access to this journal. Equations are available to subscribers only. You may subscribe either as an OSA member, or as an authorized user of your institution.

Contact your librarian or system administrator
or
Login to access OSA Member Subscription

Metrics

You do not have subscription access to this journal. Article level metrics are available to subscribers only. You may subscribe either as an OSA member, or as an authorized user of your institution.

Contact your librarian or system administrator
or
Login to access OSA Member Subscription