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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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Updated: Jul 15, 2026

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

Coupled whispering gallery modes in a multilayer-coated microsphere.

Iwao Teraoka1, Stephen Arnold

  • 1Microparticle Photophysics Laboratory Polytechnic University, NY 11201, USA. teraoka@poly.edu

Optics Letters
|April 6, 2007
PubMed
Summary

Whispering gallery modes in a three-layer microsphere show coupled coastal and inland modes. This coupling, analyzed via a quantum-mechanical analog, creates photonic field distributions similar to bonding and antibonding orbitals.

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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

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Last Updated: Jul 15, 2026

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

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

Area of Science:

  • Optics and Photonics
  • Quantum Mechanics
  • Materials Science

Background:

  • Whispering gallery modes (WGMs) are confined light modes in dielectric microspheres.
  • Multilayer coatings on microspheres can modify WGM properties.
  • Understanding light confinement in layered structures is crucial for optical devices.

Purpose of the Study:

  • To investigate whispering gallery modes in a microsphere with a specific three-layer coating (high, low, high refractive indices).
  • To analyze the coupling between different radial modes (coastal and inland) within the multilayer structure.
  • To explore the quantum-mechanical analogy of light field distribution.

Main Methods:

  • Theoretical analysis of whispering gallery modes in a three-layer microsphere.
  • Modeling of coastal and inland modes based on refractive indices (RIs) and layer thicknesses.
  • Quantum-mechanical analog of a one-dimensional particle in a double-well potential to describe mode coupling.

Main Results:

  • Existence of distinct coastal and inland modes centered on outer and inner high-RI layers.
  • Coupling between inland and coastal modes occurs across the middle low-RI layer.
  • Photonic field distributions resembling bonding and antibonding orbitals are achieved at specific RI and thickness values.

Conclusions:

  • The study demonstrates controlled coupling of WGMs in a multilayer microsphere.
  • The observed coupling phenomenon can be effectively described using a quantum-mechanical double-well potential analogy.
  • This research offers insights into manipulating light fields in nanostructured optical materials.