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Autor(en): Yordanov, Petar
Priessnitz, Tim
Kim, Min‐Jae
Cristiani, Georg
Logvenov, Gennady
Keimer, Bernhard
Kaiser, Stefan
Titel: Generation of terahertz radiation via the transverse thermoelectric effect
Erscheinungsdatum: 2023
Dokumentart: Zeitschriftenartikel
Seiten: 8
Erschienen in: Advanced materials 35 (2023), No. 2305622
URI: http://nbn-resolving.de/urn:nbn:de:bsz:93-opus-ds-145597
http://elib.uni-stuttgart.de/handle/11682/14559
http://dx.doi.org/10.18419/opus-14540
ISSN: 1521-4095
0935-9648
Zusammenfassung: Terahertz (THz) radiation is a powerful tool with widespread applications ranging from imaging, sensing, and broadband communications to spectroscopy and nonlinear control of materials. Future progress in THz technology depends on the development of efficient, structurally simple THz emitters that can be implemented in advanced miniaturized devices. Here, it is shown how the natural electronic anisotropy of layered conducting transition metal oxides enables the generation of intense terahertz radiation via the transverse thermoelectric effect. In thin films grown on off‐cut substrates, femtosecond laser pulses generate ultrafast out‐of‐plane temperature gradients, which in turn launch in‐plane thermoelectric currents, thus allowing efficient emission of the resulting THz field out of the film structure. This scheme is demonstrated in experiments on thin films of the layered metals PdCoO2 and La1.84Sr0.16CuO4, and model calculations that elucidate the influence of the material parameters on the intensity and spectral characteristics of the emitted THz field are presented. Due to its simplicity, the method opens up a promising avenue for the development of highly versatile THz sources and integrable emitter elements.
Enthalten in den Sammlungen:08 Fakultät Mathematik und Physik

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