Rectification and shift currents in GaAs
Abstract
We observe second-order rectification and shift currents in GaAs at 295 K using 150 fs pulses at 1.55 and 0.775 μm, respectively. For the same low pump intensity, 100 MW cm−2, the shift current density is 570 times larger than the rectification current density. At high intensity, the shift current is strongly affected by carrier screening and dephasing and is in phase quadrature with the rectification current. A maximum shift current density of 60 kA cm−2 is inferred for a pump intensity of 500 MW cm−2.
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For noncentrosymmetric semiconductors with nonvanishing elements, optical rectification is the prevailing contribution to THz emission for below-bandgap excitation.
“For noncentrosymmetric semiconductors with nonvanishing elements, optical rectification is the prevailing contribution to THz emission in the case of below-bandgap excitation24.”
From Ultrafast terahertz emission from emerging symmetry-broken materials (2023) · cites this paper as [24]
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References 16 · Cited by 123
- Authors
- Côté, D., Laman, N., & van Driel, H. M.
- Affiliations
- University of Toronto (CA)
- Department of Physics, University of Toronto, Toronto, Ontario M5S 1A7, Canada
- ORCID
- Côté, D.
- Venue
- Applied Physics Letters
- Publisher
- AIP Publishing
- Published
- 2002-02-11
- Volume
- 80
- Issue
- 6
- Pages
- 905-907
- ISSN
- 0003-6951 (ISSN-L)
- 1077-3118
- OpenAlex
- W1977697189
- Cited by
- 123
- References
- 16
- Citations by year
- 2026: 9 · 2025: 7 · 2024: 5 · 2023: 5 · 2022: 10 · 2021: 9 · 2020: 4 · 2019: 13 · 2018: 2 · 2017: 2 · 2016: 8 · 2015: 3 · 2014: 4 · 2013: 4 · 2012: 3
- FWCI
- 3.34
- Type
- journal article
- Language
- en
- Open access
- closed
- Locations
- Applied Physics Letters (publishedVersion)
- Topics
- Physical Sciences › Physics and Astronomy › Atomic and Molecular Physics, and Optics › Laser-Matter Interactions and Applications
- Physical Sciences › Engineering › Electrical and Electronic Engineering › Terahertz technology and applications
- Physical Sciences › Physics and Astronomy › Atomic and Molecular Physics, and Optics › Photorefractive and Nonlinear Optics
- Keywords
- shift current, GaAs, ultrafast carrier dynamics, carrier screening, femtosecond pump pulses, nonlinear optical properties
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