The effect of the Gouy phase in optical-pump-THz-probe spectroscopy
Open accessAbstract
We show theoretically as well as experimentally that the Gouy-phase shift, which depends on the exact positioning of a sample in relation to the focus of a probe beam in a pump-probe experiment, may have a pronounced effect on the shape of the pump-probe signal. The effect occurs only when single-cycle probe pulses are used, i.e. when the slowly varying envelope approximation breaks down, while it disappears for multi-cycle pulses. The effect is thus most relevant in THz time-resolved spectroscopy, where such single cycle pulses are most commonly used, but it should not be overlooked also in other spectral regimes when correspondingly short pulses are involved.
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- Authors
- Ahmed, S., Savolainen, J., & Hamm, P.
- Affiliations
- University of Zurich (CH)
- ORCID
- Hamm, Peter
- Venue
- Optics Express
- Publisher
- Optica Publishing Group
- Published
- 2014-02-18
- Volume
- 22
- Issue
- 4
- Pages
- 4256
- ISSN
- 1094-4087 (ISSN-L)
- OpenAlex
- W1973104634
- Cited by
- 16
- References
- 44
- Citations by year
- 2025: 1 · 2023: 1 · 2022: 4 · 2021: 1 · 2020: 1 · 2019: 1 · 2018: 1 · 2017: 3 · 2016: 2 · 2015: 1
- FWCI
- 1.06
- Type
- journal article
- Language
- en
- Open access
- gold
- doi.org
- Locations
- Optics Express (publishedVersion)
- PubMed (publishedVersion)
- Zurich Open Repository and Archive (University of Zurich) (acceptedVersion, other-oa)
- Zurich Open Repository and Archive (University of Zurich) (submittedVersion, other-oa)
- Zurich Open Repository and Archive (University of Zurich)
- Funders
- Swiss National Science Foundation (SNSF) (NCCR MUST)
- Topics
- Physical Sciences › Engineering › Electrical and Electronic Engineering › Terahertz technology and applications
- Physical Sciences › Physics and Astronomy › Atomic and Molecular Physics, and Optics › Laser-Matter Interactions and Applications
- Physical Sciences › Chemistry › Spectroscopy › Spectroscopy and Laser Applications
- Keywords
- Gouy phase, optical pump-THz probe spectroscopy
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