Degl'Innocenti, R., Shah, Y. D. , Wallis, R., Klimont, A., Ren, Y., Jessop, D. S., Beere, H. E. and Ritchie, D. A. (2015) A hybrid plasmonic waveguide terahertz quantum cascade laser. Applied Physics Letters, 106(8), 082101. (doi: 10.1063/1.4913307)
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Abstract
We present the realization of a quantum cascade laser emitting at around 2.85 THz, based on a hybrid plasmonic waveguide with a low refractive index dielectric cladding. This hybrid waveguide design allows the performance of a double-metal waveguide to be retained, while improving the emission far-field. A set of lasers based on the same active region material were fabricated with different metal layer thicknesses. A detailed characterization of the performance of these lasers revealed that there is an optimal trade-off that yields the best far-field emission and the maximum temperature of operation. By exploiting the pure plasmonic mode of these waveguides, the standard operation conditions of a double-metal quantum cascade laser were retrieved, such that the maximum operating temperature of these devices is not affected by the process. These results pave the way to realizing a class of integrated devices working in the terahertz range which could be further exploited to fabricate terahertz on-chip circuitry.
| Item Type: | Articles |
|---|---|
| Additional Information: | The authors acknowledge the financial support from the Engineering and Physical Sciences Research Council (Grant No. EP/J017671/1, Coherent Terahertz Systems). |
| Status: | Published |
| Refereed: | Yes |
| Glasgow Author(s) Enlighten ID: | Shah, Dr Yash Diptesh |
| Authors: | Degl'Innocenti, R., Shah, Y. D., Wallis, R., Klimont, A., Ren, Y., Jessop, D. S., Beere, H. E., and Ritchie, D. A. |
| College/School: | College of Science and Engineering > School of Engineering > Electronics and Nanoscale Engineering |
| Journal Name: | Applied Physics Letters |
| Publisher: | American Institute of Physics |
| ISSN: | 0003-6951 |
| ISSN (Online): | 1077-3118 |
| Published Online: | 23 February 2015 |
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