High-frequency modulation without the relaxation oscillation resonance in quantum cascade lasers

Roberto Paiella, Rainer Martini, Federico Capasso, Claire Gmachl, Harold Y. Hwang, Deborah L. Sivco, James N. Baillargeon, Alfred Y. Cho, Edward A. Whittaker, H. C. Liu

Research output: Contribution to journalArticle

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Abstract

Quantum cascade (QC) lasers, based on intersubband transitions in semiconductor quantum wells, are characterized by ultrafast (picosecond) carrier lifetimes. An important consequence of this unique property is the expected absence of relaxation oscillations in the transient response of these devices. Here, we discuss and experimentally verify this prediction by measuring the modulation response of several 8-μm-QC lasers, properly processed and packaged for high-speed operation, up to 10 GHz.

Original languageEnglish (US)
Pages (from-to)2526-2528
Number of pages3
JournalApplied Physics Letters
Volume79
Issue number16
DOIs
StatePublished - Oct 15 2001
Externally publishedYes

All Science Journal Classification (ASJC) codes

  • Physics and Astronomy (miscellaneous)

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    Paiella, R., Martini, R., Capasso, F., Gmachl, C., Hwang, H. Y., Sivco, D. L., Baillargeon, J. N., Cho, A. Y., Whittaker, E. A., & Liu, H. C. (2001). High-frequency modulation without the relaxation oscillation resonance in quantum cascade lasers. Applied Physics Letters, 79(16), 2526-2528. https://doi.org/10.1063/1.1411982