Terahertz quantum cascade amplifier

Ren, Y., Wallis, R., Shah, Y.D. , Jessop, D.S., Degli'Innocenti, R., Klimont, A., Kamboj, V., Beere, H.E. and Ritchie, D.A. (2015) Terahertz quantum cascade amplifier. 26th International Symposium on Space Terahertz Technology, Cambridge, MA, 16-18 March 2015.

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We have demonstrated a terahertz (THz) optical amplifier based on a 2.9 THz quantum cascade laser (QCL) structure. By depositing an antireflective coating on the QCL facet, the laser mirror losses are enhanced to fully suppress the lasing action, creating a THz quantum cascade (QC) amplifier. Terahertz radiation amplification has been obtained, by coupling a separate THz QCL of the same active region design to the QC amplifier. A maximum optical gain as large as 30 dB with singlemode radiation output is demonstrated. Furthermore, a THz imaging system based on the effect of self-mixing in this QC amplifier has also been demonstrated.

Item Type:Conference or Workshop Item
Glasgow Author(s) Enlighten ID:Shah, Dr Yash Diptesh
Authors: Ren, Y., Wallis, R., Shah, Y.D., Jessop, D.S., Degli'Innocenti, R., Klimont, A., Kamboj, V., Beere, H.E., and Ritchie, D.A.
College/School:College of Science and Engineering > School of Engineering > Electronics and Nanoscale Engineering
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