Inverse-Designed Narrowband THz Radiator for Ultrarelativistic Electrons.
View / Open Files
Authors
Yadav, Gyanendra
Kirchner, Adrian
Feurer, Thomas
Welsch, Carsten
Hommelhoff, Peter
Publication Date
2022-04-20Journal Title
ACS Photonics
ISSN
2330-4022
Publisher
American Chemical Society (ACS)
Volume
9
Issue
4
Pages
1143-1149
Language
eng
Type
Article
This Version
VoR
Metadata
Show full item recordCitation
Hermann, B., Haeusler, U., Yadav, G., Kirchner, A., Feurer, T., Welsch, C., Hommelhoff, P., & et al. (2022). Inverse-Designed Narrowband THz Radiator for Ultrarelativistic Electrons.. ACS Photonics, 9 (4), 1143-1149. https://doi.org/10.1021/acsphotonics.1c01932
Abstract
THz radiation finds various applications in science and technology. Pump-probe experiments at free-electron lasers typically rely on THz radiation generated by optical rectification of ultrafast laser pulses in electro-optic crystals. A compact and cost-efficient alternative is offered by the Smith-Purcell effect: a charged particle beam passes a periodic structure and generates synchronous radiation. Here, we employ the technique of photonic inverse design to optimize a structure for Smith-Purcell radiation at a single wavelength from ultrarelativistic electrons. The resulting design is highly resonant and emits narrowbandly. Experiments with a 3D-printed model for a wavelength of 900 μm show coherent enhancement. The versatility of inverse design offers a simple adaption of the structure to other electron energies or radiation wavelengths. This approach could advance beam-based THz generation for a wide range of applications.
Keywords
THz generation, Smith-Purcell radiation, inverse design, light-matter interaction, free-electron light sources
Sponsorship
European Research Council (884217)
Identifiers
35480494, PMC9026277
External DOI: https://doi.org/10.1021/acsphotonics.1c01932
This record's URL: https://www.repository.cam.ac.uk/handle/1810/337612
Rights
Attribution-NonCommercial-NoDerivatives 4.0 International
Licence URL: https://creativecommons.org/licenses/by-nc-nd/4.0/
Statistics
Total file downloads (since January 2020). For more information on metrics see the
IRUS guide.
Recommended or similar items
The current recommendation prototype on the Apollo Repository will be turned off on 03 February 2023. Although the pilot has been fruitful for both parties, the service provider IKVA is focusing on horizon scanning products and so the recommender service can no longer be supported. We recognise the importance of recommender services in supporting research discovery and are evaluating offerings from other service providers. If you would like to offer feedback on this decision please contact us on: support@repository.cam.ac.uk