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Related Experiment Video

Updated: Jun 13, 2026

Development of Whispering Gallery Mode Polymeric Micro-optical Electric Field Sensors
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Whispering gallery mode lasing from zinc oxide hexagonal nanodisks.

Daniel J Gargas1, Michael C Moore, Adrian Ni

  • 1Department of Chemistry, University of California, Berkeley, California 94720, USA.

ACS Nano
|April 27, 2010
PubMed
Summary

Researchers synthesized ZnO nanodisks for low-threshold whispering gallery mode (WGM) lasing. These subwavelength semiconductor nanostructures demonstrate ultraviolet WGM lasing, paving the way for on-chip nanophotonic integration.

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Area of Science:

  • Nanophotonics
  • Semiconductor Nanostructures
  • Laser Physics

Background:

  • Whispering gallery mode (WGM) cavities offer low-loss optical confinement via total internal reflection.
  • WGM resonators enable high-quality (Q) factors, crucial for efficient lasing.
  • Subwavelength nanostructures are key for miniaturizing photonic devices.

Purpose of the Study:

  • To synthesize disk-shaped semiconductor nanostructures for WGM lasing.
  • To investigate the lasing properties of ZnO nanodisks with subwavelength diameters.
  • To demonstrate the potential for on-chip nanophotonic integration.

Main Methods:

  • Bottom-up chemical synthesis of ZnO nanodisks.
  • Characterization of individual nanodisk lasing properties.

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Microwave Photonics Systems Based on Whispering-gallery-mode Resonators
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Last Updated: Jun 13, 2026

Development of Whispering Gallery Mode Polymeric Micro-optical Electric Field Sensors
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Published on: January 29, 2013

Microwave Photonics Systems Based on Whispering-gallery-mode Resonators
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  • Finite difference time domain (FDTD) simulations for mode analysis.

    • Main Results:

    • Successful synthesis of ZnO nanodisks with diameters ranging from 280 to 900 nm.
    • Demonstration of single-mode ultraviolet WGM lasing in subwavelength ZnO disks.
    • FDTD simulations confirmed WGM confinement within subwavelength disks.

    Conclusions:

    • Chemically synthesized ZnO nanodisks support efficient WGM lasing.
    • Subwavelength diameter nanodisks are viable for ultraviolet laser applications.
    • These findings advance the development of integrated nanophotonic devices.