Terahertz photoconductive waveguide emitter with excitation by a tilted optical pulse front
- We explore the tilted-pulse-front excitation technique to control the superradiant emission of terahertz (THz) pulses from large-area photonconductive semiconductor switches. Two cases are studied. First, a photoconductive antenna emitting into free space, where the propagation direction of the optically generated THz beam is controlled by the choice of the tilt angle of the pump pulse front. Second, a THz waveguide structure with an integrated photoconductive window for the generation of THz radiation, where the injection of the THz radiation into a waveguide mode is optimized by the pulse front tilt. By providing long interaction lengths, such a waveguide-based optical-pump/THz-probe set-up may provide a new platform for the study of diverse short-lived optically induced excitations.
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| Verfasserangaben: | Islam Qamar-Ul, Fanqi MengORCiD, Mark David ThomsonORCiDGND, Hartmut RoskosORCiDGND |
|---|---|
| URN: | urn:nbn:de:hebis:30:3-618463 |
| DOI: | https://doi.org/10.1364/OE.403161 |
| ISSN: | 1094-4087 |
| Titel des übergeordneten Werkes (Englisch): | Optics express |
| Verlag: | Soc. |
| Verlagsort: | Washington, DC |
| Dokumentart: | Wissenschaftlicher Artikel |
| Sprache: | Englisch |
| Datum der Veröffentlichung (online): | 23.10.2020 |
| Datum der Erstveröffentlichung: | 23.10.2020 |
| Veröffentlichende Institution: | Universitätsbibliothek Johann Christian Senckenberg |
| Datum der Freischaltung: | 03.11.2021 |
| Jahrgang: | 28 |
| Ausgabe / Heft: | 22 |
| Seitenzahl: | 9 |
| Erste Seite: | 33673 |
| Letzte Seite: | 33681 |
| Bemerkung: | Q.-U.I. greatfully acknowledges funding by a scholarship of the HessenFonds of the Hessian Ministry for Science and Art. F.M. acknowledges funding by DFG (RO 770/40 and RO 770/41). |
| Bemerkung: | © 2020 Optica Publishing Group. Users may use, reuse, and build upon the article, or use the article for text or data mining, so long as such uses are for non-commercial purposes and appropriate attribution is maintained. All other rights are reserved. |
| HeBIS-PPN: | 489325173 |
| Institute: | Physik / Physik |
| DDC-Klassifikation: | 5 Naturwissenschaften und Mathematik / 53 Physik / 530 Physik |
| Sammlungen: | Universitätspublikationen |
| Open-Access-Publikationsfonds: | Physik |
| Lizenz (Deutsch): |  Deutsches Urheberrecht |
