Wide-ridge metal-metal terahertz quantum cascade lasers with high-order lateral mode suppression

Jonathan A. Fan, Mikhail A. Belkin, Federico Capasso, Suraj P. Khanna, Mohamed Lachab, A. Giles Davies, Edmund H. Linfield

Research output: Contribution to journalArticlepeer-review

59 Scopus citations

Abstract

Terahertz quantum cascade lasers with wide-ridge metal-metal waveguides are prone to lasing in high-order lateral modes, which reduce the maximum light output power from these devices. We have demonstrated, theoretically and experimentally, that the output power can be improved severalfold by introducing "side absorbers" into the waveguide structure, which enforce lasing in the TM00 mode with minor temperature performance deterioration. Lasers without side absorbers operate up to 168 K, a current record for devices processed using indium/gold wafer bonding.

Original languageEnglish
Article number031106
JournalApplied Physics Letters
Volume92
Issue number3
DOIs
StatePublished - 2008
Externally publishedYes

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