Ring quantum cascade lasers with twisted wavefronts
| Autor: | Szedlak, Rolf, Hisch, Thomas, Schwarz, Benedikt, Holzbauer, Martin, MacFarland, Donald, Zederbauer, Tobias, Detz, Hermann, Andrews, Aaron Maxwell, Schrenk, Werner, Rotter, Stefan, Strasser, Gottfried |
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| Jazyk: | angličtina |
| Rok vydání: | 2018 |
| Předmět: | |
| Zdroj: | Scientific Reports Scientific Reports, Vol 8, Iss 1, Pp 1-6 (2018) |
| ISSN: | 2045-2322 |
| Popis: | We demonstrate the on-chip generation of twisted light beams from ring quantum cascade lasers. A monolithic gradient index metamaterial is fabricated directly into the substrate side of the semiconductor chip and induces a twist of the light’s wavefront. This significantly influences the obtained beam pattern, which changes from a central intensity minimum to a maximum depending on the discontinuity count of the metamaterial. Our design principle provides an interesting alternative to recent implementations of microlasers operating at an exceptional point. |
| Databáze: | OpenAIRE |
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