Terahertz emission from thin metal films with porous nanostructures
Abstract
We characterized the terahertz emission from a thin metal film with quasi-randomly distributed porous nanostructures. Unlike many demonstrated nanostructured metal terahertz sources, the emission is in the forward direction when the laser excitation illuminates the metal film at normal incidence, making its integration in a time-domain terahertz system straightforward. We attribute the generation mechanism to optical rectification. Moreover, we observe a deviation from the expected linear scaling of the terahertz electric field with excitation laser pulse energy, which we relate to thermal heating of the emitter.
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Nanoscale structuring of metal films enhances THz emission.
“subsequent investigations found enhanced THz emission due to nanoscale structuring, including with gratings175–177, randomly-distributed nanostructuring178–182, and precision lithographically-defined nanostructure arrays159,178 (Fig. 8a).”
From Ultrafast terahertz emission from emerging symmetry-broken materials (2023) · cites this paper as [180]
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- Authors
- Zhang, L., Buccheri, F., Zhang, C., & Zhang, X.-C.
- Affiliations
- Capital Normal University (CN)
- University of Rochester (US)
- Venue
- Applied Physics Letters
- Publisher
- AIP Publishing
- Published
- 2015-08-17
- Volume
- 107
- Issue
- 7
- ISSN
- 0003-6951 (ISSN-L)
- 1077-3118
- OpenAlex
- W1651385727
- Cited by
- 6
- References
- 30
- Citations by year
- 2023: 4 · 2017: 1 · 2016: 1
- FWCI
- 0.32
- Type
- journal article
- Language
- en
- Open access
- closed
- Locations
- Applied Physics Letters (publishedVersion)
- Funders
- Hong Kong Scholars Program
- National Keystone Basic Research Program (2014CB339806-1)
- National Natural Science Foundation of China (11374007)
- Foundation for the Author of National Excellent Doctoral Dissertation of the People's Republic of China (201237)
- 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 › Materials Science › Electronic, Optical and Magnetic Materials › Metamaterials and Metasurfaces Applications
- Keywords
- terahertz emission, thin metal films, nanoporous materials, optical rectification, thermal heating, laser excitation, nonlinear optics
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