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Electrically pumped mid-infrared random lasers.

Hou Kun Liang1, Bo Meng, Guozhen Liang

  • 1Singapore Institute of Manufacturing Technology, 71 Nanyang Drive, 638075, Singapore.

Advanced Materials (Deerfield Beach, Fla.)
|September 14, 2013
PubMed
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Researchers developed the first electrically pumped random lasers in the mid-infrared (≈ 10 μm). These lasers utilize transverse-magnetic (TM) polarized quantum cascade gain media for enhanced efficiency and confinement.

Area of Science:

  • Optics and Photonics
  • Semiconductor Lasers
  • Mid-Infrared Technology

Background:

  • Random lasers offer unique properties due to disordered structures.
  • Mid-infrared lasers are crucial for spectroscopy, sensing, and free-space communications.
  • Quantum cascade lasers provide efficient mid-infrared emission.

Purpose of the Study:

  • To demonstrate the first electrically pumped random lasers operating in the mid-infrared (≈ 10 μm).
  • To investigate the use of transverse-magnetic (TM) polarized gain medium for improved laser performance.

Main Methods:

  • Fabrication of random lasers by patterning air holes onto a quantum cascade wafer.
  • Utilizing a TM-polarized gain medium for enhanced light confinement.
  • Electrical pumping for laser operation.
Keywords:
deviceslasingmicrostructuremid infraredsemiconductor

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Related Experiment Videos

Last Updated: May 7, 2026

Characterizing Far-infrared Laser Emissions and the Measurement of Their Frequencies
09:38

Characterizing Far-infrared Laser Emissions and the Measurement of Their Frequencies

Published on: December 18, 2015

Infrared Degenerate Four-wave Mixing with Upconversion Detection for Quantitative Gas Sensing
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Infrared Degenerate Four-wave Mixing with Upconversion Detection for Quantitative Gas Sensing

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Main Results:

  • Successful realization of electrically pumped random lasers at λ ≈ 10 μm.
  • Demonstration of improved lasing efficiency and vertical confinement using TM polarization.
  • Patterned air holes in quantum cascade wafer enable random lasing.

Conclusions:

  • Electrically pumped random lasers in the mid-infrared are feasible.
  • TM polarization in quantum cascade gain media enhances laser efficiency and confinement.
  • This work opens new avenues for mid-infrared random laser applications.