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Hyperuniform disordered terahertz quantum cascade laser.

R Degl'Innocenti1, Y D Shah1, L Masini2

  • 1Cavendish Laboratory, University of Cambridge, J. J. Thomson Avenue, Cambridge CB3 0HE, United Kingdom.

Scientific Reports
|January 14, 2016
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Summary
This summary is machine-generated.

Researchers developed a terahertz quantum cascade laser in a disordered material. This random laser offers unique spectral and emission properties, including a photonic band gap and optical bistability.

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Area of Science:

  • Photonics and optical physics
  • Condensed matter physics
  • Quantum optics

Background:

  • Random lasers explore light transport in complex media.
  • They offer non-conventional spectral and angular emission patterns.
  • Engineering optical properties of disordered amplifying media is a key challenge.

Purpose of the Study:

  • To demonstrate a terahertz quantum cascade laser in a hyperuniform disordered medium.
  • To investigate the unique optical properties arising from engineered disorder.

Main Methods:

  • Fabrication of a terahertz quantum cascade laser.
  • Utilizing an isotropic hyperuniform disordered distribution.
  • Characterization of laser performance and optical properties.

Main Results:

  • Achieved laser operation with a low threshold current density.
  • Observed unique features including a photonic band gap.
  • Demonstrated unconventional angular emission and optical bistability.

Conclusions:

  • Hyperuniform disordered media can be effectively used for advanced laser applications.
  • This approach enables novel functionalities not possible with conventional lasers.
  • The demonstrated terahertz random laser opens new avenues for fundamental research and device development.