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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:
Electrostatic Boundary Conditions in Dielectrics01:27

Electrostatic Boundary Conditions in Dielectrics

When an electric field passes from one homogeneous medium to another, crossing the boundary between the two mediums imparts a discontinuity in the electric field. This results in electrostatic boundary conditions that depend on the type of mediums the field propagates through.
Consider a case where both the mediums across a boundary are two different dielectric materials. Recall that the electric field and electric displacement are proportional and related through the material's permittivity.
Induced Electric Dipoles01:28

Induced Electric Dipoles

A permanent electric dipole orients itself along an external electric field. This rotation can be quantified by defining the potential energy because the external torque does work in rotating it. Then, the potential energy is minimum at the parallel configuration and maximum at the antiparallel configuration. While the former is a stable equilibrium, the latter is an unstable equilibrium.
Since the absolute value of potential energy holds no physical meaning, its zero value can be chosen as per...

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Fabrication And Characterization Of Photonic Crystal Slow Light Waveguides And Cavities
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Dipole radiation within one-dimensional anisotropic microcavities: a simulation method.

Lieven Penninck1, Patrick De Visschere, Jeroen Beeckman

  • 1Electronics and Information Systems department, Ghent University, Ghent, Belgium. lieven.penninck@elis.ugent.be

Optics Express
|September 22, 2011
PubMed
Summary

This study introduces a simulation method for light emission in anisotropic thin films, crucial for understanding device performance. The method accurately predicts light intensity and polarization, aiding in the design of advanced optical devices.

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Using Microwave and Macroscopic Samples of Dielectric Solids to Study the Photonic Properties of Disordered Photonic Bandgap Materials

Published on: September 26, 2014

Area of Science:

  • Optics and Photonics
  • Materials Science
  • Computational Physics

Background:

  • Uniaxially anisotropic materials are key components in advanced optical devices.
  • Accurate simulation of light emission from these materials is essential for device design and optimization.
  • Existing simulation methods may not fully capture the complexities of anisotropic microcavities.

Purpose of the Study:

  • To develop a comprehensive simulation method for light emission in uniaxially anisotropic thin-film devices.
  • To model the behavior of dipole antennas within one-dimensional microcavities featuring anisotropic layers.
  • To analyze the influence of optical axis orientation on light emission characteristics.

Main Methods:

  • Derivation of a plane wave expansion for dipole radiation in anisotropic media using Maxwell's equations.
  • Application of the scattering matrix method to calculate dipole emission within anisotropic microcavities.
  • Simulation of emission in various scenarios, including infinite media, anisotropic slab waveguides, and liquid crystal waveguides.

Main Results:

  • The simulation method successfully models light emission from dipoles in anisotropic microcavities.
  • Calculations demonstrate the dependency of emission intensity and polarization on direction.
  • The method is validated through applications to diverse anisotropic optical structures.

Conclusions:

  • The presented simulation method provides a robust tool for analyzing light emission in uniaxially anisotropic thin-film devices.
  • This approach enables precise prediction of optical properties, facilitating the development of novel photonic devices.
  • The findings are applicable to waveguides and microcavities with arbitrarily oriented optical axes.