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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:
IR Spectrum Peak Splitting: Symmetric vs Asymmetric Vibrations01:08

IR Spectrum Peak Splitting: Symmetric vs Asymmetric Vibrations

Identical bonds within a polyatomic group can stretch symmetrically (in-phase) or asymmetrically (out-of-phase). Similar to hydrogen bonding, these vibrations also influence the shape of the IR peak. Generally, asymmetric stretching frequencies are higher than symmetric stretching frequencies. For example, primary amines exhibit two distinct IR peaks between 3300–3500 cm−1 corresponding to the symmetric and asymmetric N-H stretching, while secondary amines exhibit a single stretching vibration...
Gauss's Law: Cylindrical Symmetry01:20

Gauss's Law: Cylindrical Symmetry

A charge distribution has cylindrical symmetry if the charge density depends only upon the distance from the axis of the cylinder and does not vary along the axis or with the direction about the axis. In other words, if a system varies if it is rotated around the axis or shifted along the axis, it does not have cylindrical symmetry. In real systems, we do not have infinite cylinders; however, if the cylindrical object is considerably longer than the radius from it that we are interested in,...

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Related Experiment Video

Updated: Jun 17, 2026

Fabrication And Characterization Of Photonic Crystal Slow Light Waveguides And Cavities
11:08

Fabrication And Characterization Of Photonic Crystal Slow Light Waveguides And Cavities

Published on: November 30, 2012

Spectrum control by anisotropy in a cylindrical microcavity.

Xue-Liang Kang1, Yong-Ping Li, Shan-Liang Qiu

  • 1Key Laboratory of Quantum Information, Chinese Academy of Science, Hefei, 230026, China.

Optics Express
|January 7, 2010
PubMed
Summary

Anisotropic cylindrical microcavities offer tunable wavelengths by altering refractive indices. This control over light spectrum is crucial for developing advanced tunable filters and sensors.

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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

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Related Experiment Videos

Last Updated: Jun 17, 2026

Fabrication And Characterization Of Photonic Crystal Slow Light Waveguides And Cavities
11:08

Fabrication And Characterization Of Photonic Crystal Slow Light Waveguides And Cavities

Published on: November 30, 2012

Fabrication of 1-D Photonic Crystal Cavity on a Nanofiber Using Femtosecond Laser-induced Ablation
13:02

Fabrication of 1-D Photonic Crystal Cavity on a Nanofiber Using Femtosecond Laser-induced Ablation

Published on: February 25, 2017

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

Background:

  • Whispering-gallery modes (WGM) in microcavities are sensitive to material properties.
  • Anisotropic materials offer unique optical responses not found in isotropic media.

Purpose of the Study:

  • To investigate spectrum control via anisotropy in cylindrical microcavities.
  • To analyze the impact of electric anisotropic medium on Whispering-gallery modes.

Main Methods:

  • Finite-difference time domain (FDTD) method for electric anisotropic media.
  • Volume-average Effective Permittivity approximation.

Main Results:

  • Resonant frequencies shift proportionally to the difference in principal refractive indices.
  • Quality factors decay exponentially with increased refractive index difference due to directional emission.

Conclusions:

  • Anisotropic cylindrical microcavities provide novel spectrum tuning characteristics.
  • Potential applications include tunable light sources, filters, and sensors.