Broadly tunable monolithic room-temperature terahertz quantum cascade laser sources

Seungyong Jung, Aiting Jiang, Yifan Jiang, Karun Vijayraghavan, Xiaojun Wang, Mariano Troccoli and Mikhail A. Belkin ()
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Seungyong Jung: The University of Texas at Austin
Aiting Jiang: The University of Texas at Austin
Yifan Jiang: The University of Texas at Austin
Karun Vijayraghavan: The University of Texas at Austin
Xiaojun Wang: Adtech Optics, Inc., 18007 Cortney Court, City of Industry
Mariano Troccoli: Adtech Optics, Inc., 18007 Cortney Court, City of Industry
Mikhail A. Belkin: The University of Texas at Austin

Nature Communications, 2014, vol. 5, issue 1, 1-7

Abstract: Abstract Electrically pumped room-temperature semiconductor sources of tunable terahertz radiation in 1–5 THz spectral range are highly desired to enable compact instrumentation for THz sensing and spectroscopy. Quantum cascade lasers with intra-cavity difference-frequency generation are currently the only room-temperature electrically pumped semiconductor sources that can operate in the entire 1–5 THz spectral range. Here we demonstrate that this technology is suitable to implementing monolithic room-temperature terahertz tuners with broadband electrical control of the emission frequency. Experimentally, we demonstrate ridge waveguide devices electrically tunable between 3.44 and 4.02 THz.

Date: 2014
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DOI: 10.1038/ncomms5267

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