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Superradiant terahertz emission by dipolaritons.

O Kyriienko1, A V Kavokin, I A Shelykh

  • 1Science Institute, University of Iceland, Dunhagi-3, IS-107 Reykjavik, Iceland and Division of Physics and Applied Physics, Nanyang Technological University, 637371 Singapore.

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|November 12, 2013
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Summary
This summary is machine-generated.

Dipolaritons, light-matter quasiparticles, exhibit Rabi flopping oscillations. These oscillations generate enhanced terahertz (THz) emission, potentially boosted by a supplementary THz cavity.

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Area of Science:

  • Condensed matter physics
  • Quantum optics
  • Materials science

Background:

  • Dipolaritons are hybrid light-matter quasiparticles formed in microcavities with double quantum wells.
  • They arise from resonant coupling between direct and indirect excitons through electronic tunneling, imparting large dipole moments.
  • Understanding dipolariton dynamics is crucial for novel light-matter interactions.

Purpose of the Study:

  • To investigate the generation of terahertz (THz) emission from dipolaritons.
  • To explore the enhancement of THz emission using a supplementary THz cavity.
  • To analyze the role of Rabi flopping in THz signal generation.

Main Methods:

  • Fabrication of double quantum wells within microcavities.
  • Resonant excitation of the cavity mode using short light pulses.
  • Observation and analysis of oscillations in indirect exciton density.
  • Measurement of terahertz (THz) emission spectra.
  • Utilizing a supplementary THz cavity to study weak coupling effects.

Main Results:

  • Resonant excitation induces Rabi flopping oscillations in the indirect exciton density.
  • These oscillations drive a classical Hertz dipole array, generating superradiant THz emission.
  • The THz signal intensity can be significantly enhanced by employing a supplementary THz cavity in the weak coupling regime.

Conclusions:

  • Dipolaritons offer a pathway to generate tunable terahertz (THz) radiation.
  • Rabi flopping dynamics are key to the superradiant THz emission mechanism.
  • Supplementary THz cavities provide a method for enhancing THz signal output from dipolariton systems.