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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:
Super-resolution Fluorescence Microscopy01:37

Super-resolution Fluorescence Microscopy

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Photoluminescence is a process where a molecule absorbs light energy and re-emits it in the form of light. This phenomenon occurs when a substance absorbs photons, promoting its electrons to higher energy level excited states, followed by a relaxation process in which the electrons return to their original ground state energy levels and emit light. Photoluminescence is widely observed in various materials, including semiconductors, and organic and inorganic compounds.
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Related Experiment Video

Updated: Jul 10, 2026

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

Resonance fluorescence from a coherently driven semiconductor quantum dot in a cavity.

A Muller1, E B Flagg, P Bianucci

  • 1Department of Physics, The University of Texas at Austin, Austin, Texas 78712, USA.

Physical Review Letters
|November 13, 2007
PubMed
Summary

Semiconductor quantum dots can achieve resonance fluorescence, emitting light like a coherently driven two-level system. This was confirmed by observing a Mollow triplet and nonclassical light emission, demonstrating quantum properties.

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Last Updated: Jul 10, 2026

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Area of Science:

  • Quantum optics
  • Solid-state physics
  • Nanophotonics

Background:

  • Resonance fluorescence is the resonant emission from a coherently driven two-level system.
  • Semiconductor quantum dots are promising candidates for quantum optical applications.

Purpose of the Study:

  • To demonstrate resonance fluorescence in a semiconductor quantum dot.
  • To characterize the fluorescence properties under strong excitation regimes.

Main Methods:

  • Embedding a quantum dot in a planar optical microcavity.
  • Exciting the quantum dot using a waveguide mode to minimize laser scattering.
  • Measuring the first-order correlation function g(tau) via interferometry.
  • Performing second-order correlation measurements.

Main Results:

  • Observed the transition from weak to strong excitation regimes.
  • Detected oscillations in the first-order correlation function g(tau).
  • Measured a Mollow triplet with a Rabi splitting up to 13.3 microeV.
  • Confirmed nonclassical light emission through second-order correlation measurements.

Conclusions:

  • Resonance fluorescence is achievable in semiconductor quantum dots.
  • The observed Mollow triplet and nonclassical emission highlight the quantum nature of the system.
  • This work paves the way for quantum information processing applications using quantum dots.