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Related Concept Videos

Standing Waves in a Cavity01:28

Standing Waves in a Cavity

A household microwave and lasers are examples of standing electromagnetic waves in a cavity. When two conducting metal plates are placed parallel at the nodal planes, it creates a cavity where standing waves are formed. The cavity between the two planes is analogous to a stretched string held at the points x = 0 and x = L. Here, the distance 'L' between the two planes must be an integer multiple of half of the wavelength. The wavelengths that satisfy this condition are given by:

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Related Experiment Video

Updated: Jun 14, 2026

Microwave Photonics Systems Based on Whispering-gallery-mode Resonators
12:18

Microwave Photonics Systems Based on Whispering-gallery-mode Resonators

Published on: August 5, 2013

Comparison of raised-microdisk whispering-gallery-mode characterization techniques.

Brandon Redding1, Elton Marchena, Tim Creazzo

  • 1Department of Electrical and Computer Engineering, University of Delaware, Newark, Delaware 19716, USA. redding@udel.edu

Optics Letters
|April 6, 2010
PubMed
Summary

We compared two methods for characterizing whispering-gallery modes (WGMs) in microdisks. The techniques yielded different results due to radiative bending loss, impacting their suitability for specific applications.

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Stimulated Stokes and Antistokes Raman Scattering in Microspherical Whispering Gallery Mode Resonators
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Stimulated Stokes and Antistokes Raman Scattering in Microspherical Whispering Gallery Mode Resonators

Published on: April 4, 2016

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Last Updated: Jun 14, 2026

Microwave Photonics Systems Based on Whispering-gallery-mode Resonators
12:18

Microwave Photonics Systems Based on Whispering-gallery-mode Resonators

Published on: August 5, 2013

Stimulated Stokes and Antistokes Raman Scattering in Microspherical Whispering Gallery Mode Resonators
12:21

Stimulated Stokes and Antistokes Raman Scattering in Microspherical Whispering Gallery Mode Resonators

Published on: April 4, 2016

Area of Science:

  • Optics and Photonics
  • Materials Science
  • Nanotechnology

Background:

  • Whispering-gallery modes (WGMs) are crucial for microdisk resonators.
  • Characterizing WGMs is essential for understanding and utilizing microdisk devices.
  • Existing techniques for WGM characterization have limitations.

Purpose of the Study:

  • To compare two prevalent WGM characterization techniques: tapered fiber coupling and far-field collection.
  • To investigate the behavior of WGMs in silicon (Si) nanocrystal raised microdisks using both methods.
  • To elucidate the reasons for observed differences in WGM behavior between the techniques.

Main Methods:

  • Application of tapered fiber coupling to collect WGM emission.
  • Utilization of far-field collection to capture WGM emission.
  • Experimental study on Si nanocrystal raised microdisks.

Main Results:

  • Significant differences in observed WGM behavior between the two techniques.
  • Identification of radiative bending loss as the key factor influencing far-field collection.
  • Demonstration of distinct operational regimes where each technique is more appropriate.

Conclusions:

  • The choice of WGM characterization technique significantly impacts experimental outcomes.
  • Understanding radiative bending loss is critical for interpreting far-field WGM measurements.
  • Guidance is provided on selecting the optimal WGM characterization method based on experimental needs.