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Related Experiment Video

Updated: May 4, 2026

Design, Fabrication, and Experimental Characterization of Plasmonic Photoconductive Terahertz Emitters
10:54

Design, Fabrication, and Experimental Characterization of Plasmonic Photoconductive Terahertz Emitters

Published on: July 8, 2013

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Terahertz semiconductor-heterostructure laser.

Rüdeger Köhler1, Alessandro Tredicucci, Fabio Beltram

  • 1NEST-INFM and Scuola Normale Superiore, Piazza dei Cavalieri 7, 56126 Pisa, Italy. koehler@nest.sns.it

Nature
|May 10, 2002
PubMed
Summary
This summary is machine-generated.

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Researchers developed a novel monolithic terahertz injection laser using semiconductor heterostructures. This breakthrough addresses the need for compact, efficient terahertz sources, paving the way for new applications.

Area of Science:

  • Solid-state physics
  • Optoelectronics
  • Semiconductor device physics

Background:

  • Semiconductor devices are crucial for generating electromagnetic radiation across various spectra.
  • The terahertz (THz) gap (1-10 THz) remains underdeveloped due to a lack of compact, low-power solid-state sources.
  • Potential THz applications include chemical detection, astronomy, and medical imaging.

Purpose of the Study:

  • To report a novel monolithic terahertz injection laser.
  • To demonstrate a viable solid-state source for the underdeveloped THz region.

Main Methods:

  • Utilized interminiband transitions in the conduction band of a GaAs/AlGaAs heterostructure.
  • Developed a monolithic injection laser design.

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Last Updated: May 4, 2026

Design, Fabrication, and Experimental Characterization of Plasmonic Photoconductive Terahertz Emitters
10:54

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Published on: July 8, 2013

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

  • The prototype laser emits a single mode at 4.4 THz.
  • Achieved high output power (>2 mW) with low threshold current densities (few hundred A cm(-2)) up to 50 K.

Conclusions:

  • The developed terahertz injection laser shows significant promise for practical photonic systems.
  • Further development could lead to continuous-wave and high-temperature operation.