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

Quanyong Lu, N. Bandyopadhyay, Steven Boyd Slivken, Y. Bai, Manijeh Razeghi

Research output: Contribution to journalArticlepeer-review

46 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 languageEnglish (US)
Article number011101
JournalApplied Physics Letters
Volume103
Issue number1
DOIs
StatePublished - Jul 1 2013

ASJC Scopus subject areas

  • Physics and Astronomy (miscellaneous)

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