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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:
Crystal Field Theory - Tetrahedral and Square Planar Complexes02:46

Crystal Field Theory - Tetrahedral and Square Planar Complexes

Tetrahedral Complexes
Crystal field theory (CFT) is applicable to molecules in geometries other than octahedral. In octahedral complexes, the lobes of the dx2−y2 and dz2 orbitals point directly at the ligands. For tetrahedral complexes, the d orbitals remain in place, but with only four ligands located between the axes. None of the orbitals points directly at the tetrahedral ligands. However, the dx2−y2 and dz2 orbitals (along the Cartesian axes) overlap with the ligands less than the dxy,...
Crystal Field Theory - Octahedral Complexes02:58

Crystal Field Theory - Octahedral Complexes

Crystal Field Theory
To explain the observed behavior of transition metal complexes (such as colors), a model involving electrostatic interactions between the electrons from the ligands and the electrons in the unhybridized d orbitals of the central metal atom has been developed. This electrostatic model is crystal field theory (CFT). It helps to understand, interpret, and predict the colors, magnetic behavior, and some structures of coordination compounds of transition metals.
CFT focuses on...
Imperfections in Crystal Structure: Point, Line and Plane Defects01:25

Imperfections in Crystal Structure: Point, Line and Plane Defects

A perfect crystal, in theory, has a uniform structure with the same unit cell and lattice points throughout. However, any deviation from this periodic arrangement is known as an imperfection or defect. These defects can be categorized into three types: point, line, and plane defects.Point defects occur when there is a deviation from the ideal due to missing atoms, displaced atoms, or additional atoms. These imperfections might occur due to imperfect packing during crystallization or because of...

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Related Experiment Video

Updated: Jul 16, 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

Coupled-cavity QED using planar photonic crystals.

S Hughes1

  • 1Department of Physics, Queen's University, Kingston, Ontario K7L 3N6 Canada. shughes@physics.queensu.ca

Physical Review Letters
|March 16, 2007
PubMed
Summary

We developed a new method to control cavity quantum electrodynamics (QED) by coupling two photonic-crystal nanocavities. This technique enhances quantum dot optical responses and simplifies cavity QED regimes like vacuum Rabi splitting.

Area of Science:

  • Quantum optics
  • Solid-state physics
  • Nanophotonics

Background:

  • Cavity quantum electrodynamics (QED) studies light-matter interactions in confined electromagnetic fields.
  • Controlling quantum phenomena in nanophotonic systems is crucial for quantum technologies.

Purpose of the Study:

  • To introduce a novel technique for controlling cavity QED.
  • To demonstrate the influence of a distant cavity on quantum dot optical response.
  • To simplify and enrich cavity QED regimes.

Main Methods:

  • Indirectly coupling two planar-photonic-crystal nanocavities via an integrated waveguide.
  • Utilizing an analytical expression for the photon Green function.
  • Analyzing the optical response of a single quantum dot embedded in one cavity.

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

Published on: February 25, 2017

Resonance Fluorescence of an InGaAs Quantum Dot in a Planar Cavity Using Orthogonal Excitation and Detection
12:57

Resonance Fluorescence of an InGaAs Quantum Dot in a Planar Cavity Using Orthogonal Excitation and Detection

Published on: October 13, 2017

Related Experiment Videos

Last Updated: Jul 16, 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

Resonance Fluorescence of an InGaAs Quantum Dot in a Planar Cavity Using Orthogonal Excitation and Detection
12:57

Resonance Fluorescence of an InGaAs Quantum Dot in a Planar Cavity Using Orthogonal Excitation and Detection

Published on: October 13, 2017

Main Results:

  • The optical response of a quantum dot is significantly influenced by a distant coupled cavity.
  • The technique allows for easier observation of cavity QED phenomena.
  • Vacuum Rabi splitting and other cavity QED regimes are enriched.

Conclusions:

  • Indirect coupling of nanocavities offers a powerful method for controlling cavity QED.
  • This approach provides enhanced and simplified access to fundamental quantum phenomena.
  • The findings have implications for developing advanced quantum devices.