Coupled-cavity terahertz quantum cascade lasers for single mode operation
| Autor: | Stefano Barbieri, Jean-Michel Manceau, Edmund H. Linfield, A. G. Davies, Hua Li, Lianhe Li, Carlo Sirtori, Alessio Andronico, Vishal S. Jagtap |
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| Jazyk: | angličtina |
| Rok vydání: | 2014 |
| Předmět: |
Materials science
Physics and Astronomy (miscellaneous) Terahertz radiation business.industry Single-mode optical fiber Physics::Optics 02 engineering and technology 021001 nanoscience & nanotechnology Laser law.invention 020210 optoelectronics & photonics Optics Cascade law 0202 electrical engineering electronic engineering information engineering Optoelectronics Dry etching Photolithography 0210 nano-technology Air gap (plumbing) business Quantum |
| Zdroj: | Applied Physics Letters |
| ISSN: | 0003-6951 |
| DOI: | 10.1063/1.4884056 |
| Popis: | We demonstrate the operation of coupled-cavity terahertz frequency quantum-cascade lasers composed of two sub-cavities separated by an air gap realized by optical lithography and dry etching. This geometry allows stable, single mode operation with typical side mode suppression ratios in the 30–40 dB range. We employ a transfer matrix method to model the mode selection mechanism. The obtained results are in good agreement with the measurements and allow prediction of the operating frequency. |
| Databáze: | OpenAIRE |
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