PhysRevLett.125.263901.pdf (871.43 kB)
All-optical two-color terahertz emission from quasi-2D nonlinear surfaces
Version 2 2023-06-12, 09:36
Version 1 2023-06-09, 22:14
journal contribution
posted on 2023-06-12, 09:36 authored by Juan Sebastian Totero Gongora, Luke Peters, Jacob Tunesi, Vittorio Cecconi, M Clerici, Alessia Pasquazi, Marco PecciantiTwo-color terahertz (THz) generation is a field-matter process combining an optical pulse and its second harmonic. Its application in condensed matter is challenged by the lack of phase matching among multiple interacting fields. Here, we demonstrate phase-matching-free two-color THz conversion in condensed matter by introducing a highly resonant absorptive system. The generation is driven by a third-order nonlinear interaction localized at the surface of a narrow-band-gap semiconductor, and depends directly on the relative phase between the two colors. We show how to isolate the third-order effect among other competitive THz-emitting surface mechanisms, exposing the general features of the two-color process.
History
Publication status
- Published
File Version
- Published version
Journal
Physical Review LettersISSN
0031-9007Publisher
American Physical SocietyExternal DOI
Issue
26Volume
125Page range
1-6Article number
a263901Department affiliated with
- Physics and Astronomy Publications
Research groups affiliated with
- Atomic, Molecular and Optical Physics Research Group Publications
Full text available
- Yes
Peer reviewed?
- Yes
Legacy Posted Date
2020-11-20First Open Access (FOA) Date
2021-01-11First Compliant Deposit (FCD) Date
2020-11-19Usage metrics
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