Room temperature terahertz quantum cascade laser sources with 215 μw output power through epilayer-down mounting

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

doi:10.1063/1.4812814

Room temperature terahertz quantum cascade laser sources with 215 μw output power through epilayer-down mounting

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

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

49 Scopus citations

Abstract

We report room temperature terahertz (THz) quantum cascade laser sources with high power based on difference frequency generation. The device is Čerenkov phase matched and spectrally purified with an integrated dual-period distributed-feedback grating. Symmetric current injection and epilayer-down mounting of the device onto a patterned submount are used to improve the electrical uniformity and heat removal, respectively. The epilayer-down mounting also allows for THz anti-reflective coating to enhance the THz outcoupling efficiency. Single mode emission at 3.5 THz with a side-mode suppression ratio and output power up to 30 dB and 215 μW are obtained, respectively.

Original language	English (US)
Article number	011101
Journal	Applied Physics Letters
Volume	103
Issue number	1
DOIs	https://doi.org/10.1063/1.4812814
State	Published - Jul 1 2013

ASJC Scopus subject areas

Physics and Astronomy (miscellaneous)

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title = "Room temperature terahertz quantum cascade laser sources with 215 μw output power through epilayer-down mounting",

abstract = "We report room temperature terahertz (THz) quantum cascade laser sources with high power based on difference frequency generation. The device is {\v C}erenkov phase matched and spectrally purified with an integrated dual-period distributed-feedback grating. Symmetric current injection and epilayer-down mounting of the device onto a patterned submount are used to improve the electrical uniformity and heat removal, respectively. The epilayer-down mounting also allows for THz anti-reflective coating to enhance the THz outcoupling efficiency. Single mode emission at 3.5 THz with a side-mode suppression ratio and output power up to 30 dB and 215 μW are obtained, respectively.",

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

note = "Funding Information: This work is partially supported by the National Science Foundation under grant ECCS-1231289. The authors would also like to acknowledge the encouragement and support of Dr. D. Pavlidis from National Science Foundation, Dr. K.K. Law from the Naval Air Warfare Center, Dr. T. Manzur from the Naval Undersea Warfare Center, and Dr. N. Dhar from the Defense Advanced Research Projects Agency.",

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AU - Lu, Q. Y.

AU - Bandyopadhyay, N.

AU - Slivken, S.

AU - Bai, Y.

AU - Razeghi, M.

N1 - Funding Information: This work is partially supported by the National Science Foundation under grant ECCS-1231289. The authors would also like to acknowledge the encouragement and support of Dr. D. Pavlidis from National Science Foundation, Dr. K.K. Law from the Naval Air Warfare Center, Dr. T. Manzur from the Naval Undersea Warfare Center, and Dr. N. Dhar from the Defense Advanced Research Projects Agency.

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N2 - We report room temperature terahertz (THz) quantum cascade laser sources with high power based on difference frequency generation. The device is Čerenkov phase matched and spectrally purified with an integrated dual-period distributed-feedback grating. Symmetric current injection and epilayer-down mounting of the device onto a patterned submount are used to improve the electrical uniformity and heat removal, respectively. The epilayer-down mounting also allows for THz anti-reflective coating to enhance the THz outcoupling efficiency. Single mode emission at 3.5 THz with a side-mode suppression ratio and output power up to 30 dB and 215 μW are obtained, respectively.

AB - We report room temperature terahertz (THz) quantum cascade laser sources with high power based on difference frequency generation. The device is Čerenkov phase matched and spectrally purified with an integrated dual-period distributed-feedback grating. Symmetric current injection and epilayer-down mounting of the device onto a patterned submount are used to improve the electrical uniformity and heat removal, respectively. The epilayer-down mounting also allows for THz anti-reflective coating to enhance the THz outcoupling efficiency. Single mode emission at 3.5 THz with a side-mode suppression ratio and output power up to 30 dB and 215 μW are obtained, respectively.

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Room temperature terahertz quantum cascade laser sources with 215 μw output power through epilayer-down mounting

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