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Nonlinear terahertz emission in semiconductor microcavities.

I G Savenko1, I A Shelykh, M A Kaliteevski

  • 1Science Institute, University of Iceland, Dunhagi-3, IS-107, Reykjavik, Iceland.

Physical Review Letters
|July 30, 2011
PubMed
Summary
This summary is machine-generated.

We explore nonlinear terahertz emission from cavity polaritons during lasing. Quantum microcavities exhibit diverse terahertz phenomena like bistability and pulse generation, showcasing quantum effects in nonlinear optics.

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Area of Science:

  • Quantum optics
  • Condensed matter physics
  • Terahertz science

Background:

  • Cavity polaritons are quasiparticles formed by the strong coupling of photons and excitons within an optical microcavity.
  • Polariton lasing is a coherent phenomenon observed in these systems, analogous to traditional lasing.
  • Nonlinear optical phenomena in the terahertz range are crucial for advanced spectroscopy and optoelectronics.

Purpose of the Study:

  • To investigate the nonlinear terahertz emission from cavity polaritons under lasing conditions.
  • To explore the quantum nature of terahertz-polariton coupling.
  • To identify and characterize novel nonlinear phenomena in the terahertz range within quantum microcavities.

Main Methods:

  • Utilizing the Lindblad master equation approach to model the quantum dynamics.
  • Simulating the system of cavity polaritons in the regime of polariton lasing.
  • Analyzing the resulting terahertz emission spectra and temporal profiles.

Main Results:

  • Demonstrated rich nonlinear phenomena in terahertz emission.
  • Observed bistability, indicating distinct stable states of the system.
  • Showcased the generation of short terahertz pulses.
  • Identified terahertz switching as a potential application.

Conclusions:

  • Quantum microcavities exhibit complex nonlinear behavior in the terahertz range.
  • The Lindblad master equation accurately captures quantum effects in terahertz-polariton coupling.
  • These findings pave the way for novel terahertz devices based on polaritonics.