Bitte benutzen Sie diese Kennung, um auf die Ressource zu verweisen:
http://doi.org/10.25358/openscience-9194
Autoren: | Wagner, Ford M Melnikas, Simas Cramer, Joel Damry, Djamshid A. Xia, Chelsea Q. Peng, Kun Jakob, Gerhard Kläui, Mathias Kičas, Simonas Johnston, Michael B. |
Titel: | Optimised spintronic emitters of terahertz radiation for time-domain spectroscopy |
Online-Publikationsdatum: | 19-Jun-2023 |
Erscheinungsdatum: | 2023 |
Sprache des Dokuments: | Englisch |
Zusammenfassung/Abstract: | Spintronic metal thin films excited by femtosecond laser pulses have recently emerged as excellent broadband sources of terahertz (THz) radiation. Unfortunately, these emitters transmit a significant proportion of the incident excitation laser, which causes two issues: first, the transmitted light can interfere with measurements and so must be attenuated; second, the transmitted light is effectively wasted as it does not drive further THz generation. Here, we address both issues with the inclusion of a high-reflectivity (HR) coating made from alternating layers of SiO2 and Ta2O5. Emitters with the HR coating transmit less than 0.1% of the incident excitation pulse. Additionally, we find that the HR coating increases the peak THz signal by roughly 35%, whereas alternative attenuating elements, such as cellulose nitrate films, reduce the THz signal. To further improve the emission, we study the inclusion of an anti-reflective coating to the HR-coated emitters and find the peak THz signal is enhanced by a further 4%. |
DDC-Sachgruppe: | 530 Physik 530 Physics |
Veröffentlichende Institution: | Johannes Gutenberg-Universität Mainz |
Organisationseinheit: | FB 08 Physik, Mathematik u. Informatik |
Veröffentlichungsort: | Mainz |
ROR: | https://ror.org/023b0x485 |
DOI: | http://doi.org/10.25358/openscience-9194 |
Version: | Published version |
Publikationstyp: | Zeitschriftenaufsatz |
Nutzungsrechte: | CC BY |
Informationen zu den Nutzungsrechten: | https://creativecommons.org/licenses/by/4.0/ |
Zeitschrift: | Journal of infrared, millimeter, and terahertz waves 44 |
Seitenzahl oder Artikelnummer: | 52 65 |
Verlag: | Springer |
Verlagsort: | New York, NY |
Erscheinungsdatum: | 2023 |
ISSN: | 1866-6892 |
DOI der Originalveröffentlichung: | 10.1007/s10762-022-00897-9 |
Enthalten in den Sammlungen: | JGU-Publikationen |
Dateien zu dieser Ressource:
Datei | Beschreibung | Größe | Format | ||
---|---|---|---|---|---|
optimised_spintronic_emitters-20230511120427258.pdf | Published version | 1.38 MB | Adobe PDF | Öffnen/Anzeigen |