Room temperature single-mode terahertz sources based on intracavity difference-frequency generation in quantum cascade lasers

Q. Y. Lu; N. Bandyopadhyay; S. Slivken; Y. Bai; M. Razeghi

doi:10.1063/1.3645016

Room temperature single-mode terahertz sources based on intracavity difference-frequency generation in quantum cascade lasers

Q. Y. Lu^*, N. Bandyopadhyay, S. Slivken, Y. Bai, M. Razeghi

^*Corresponding author for this work

Research output: Contribution to journal › Article › peer-review

103 Scopus citations

Abstract

We demonstrate room temperature single-mode THz emission at 4 THz based on intracavity difference-frequency generation from mid-infrared dual-wavelength quantum cascade lasers. An integrated dual-period distributed feedback grating is defined on the cap layer to purify both mid-infrared pumping wavelengths and in turn the THz spectra. Single mode operation of the pumping wavelengths results in a single-mode THz operation with a narrow linewidth of 6.6 GHz. A maximum THz power of 8.5 μW with a power conversion efficiency of 10 μW/W² is obtained at room temperature.

Original language	English (US)
Article number	131106
Journal	Applied Physics Letters
Volume	99
Issue number	13
DOIs	https://doi.org/10.1063/1.3645016
State	Published - Sep 26 2011

ASJC Scopus subject areas

Physics and Astronomy (miscellaneous)

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title = "Room temperature single-mode terahertz sources based on intracavity difference-frequency generation in quantum cascade lasers",

abstract = "We demonstrate room temperature single-mode THz emission at 4 THz based on intracavity difference-frequency generation from mid-infrared dual-wavelength quantum cascade lasers. An integrated dual-period distributed feedback grating is defined on the cap layer to purify both mid-infrared pumping wavelengths and in turn the THz spectra. Single mode operation of the pumping wavelengths results in a single-mode THz operation with a narrow linewidth of 6.6 GHz. A maximum THz power of 8.5 μW with a power conversion efficiency of 10 μW/W2 is obtained at room temperature.",

author = "Lu, {Q. Y.} and N. Bandyopadhyay and S. Slivken and Y. Bai and M. Razeghi",

note = "Funding Information: The authors would like to thank the support, interest, and encouragement of Dr. Tariq Manzur from the Naval Undersea Warfare Center and Dr. Scott Rodgers from Defense Advanced Research Projects Agency. Copyright: Copyright 2011 Elsevier B.V., All rights reserved.",

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doi = "10.1063/1.3645016",

language = "English (US)",

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AU - Lu, Q. Y.

AU - Bandyopadhyay, N.

AU - Slivken, S.

AU - Bai, Y.

AU - Razeghi, M.

N1 - Funding Information: The authors would like to thank the support, interest, and encouragement of Dr. Tariq Manzur from the Naval Undersea Warfare Center and Dr. Scott Rodgers from Defense Advanced Research Projects Agency. Copyright: Copyright 2011 Elsevier B.V., All rights reserved.

PY - 2011/9/26

Y1 - 2011/9/26

N2 - We demonstrate room temperature single-mode THz emission at 4 THz based on intracavity difference-frequency generation from mid-infrared dual-wavelength quantum cascade lasers. An integrated dual-period distributed feedback grating is defined on the cap layer to purify both mid-infrared pumping wavelengths and in turn the THz spectra. Single mode operation of the pumping wavelengths results in a single-mode THz operation with a narrow linewidth of 6.6 GHz. A maximum THz power of 8.5 μW with a power conversion efficiency of 10 μW/W2 is obtained at room temperature.

AB - We demonstrate room temperature single-mode THz emission at 4 THz based on intracavity difference-frequency generation from mid-infrared dual-wavelength quantum cascade lasers. An integrated dual-period distributed feedback grating is defined on the cap layer to purify both mid-infrared pumping wavelengths and in turn the THz spectra. Single mode operation of the pumping wavelengths results in a single-mode THz operation with a narrow linewidth of 6.6 GHz. A maximum THz power of 8.5 μW with a power conversion efficiency of 10 μW/W2 is obtained at room temperature.

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Room temperature single-mode terahertz sources based on intracavity difference-frequency generation in quantum cascade lasers

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