2D THz spectroscopic investigation of ballistic conduction-band electron dynamics in InSb
Open accessAbstract
We follow the trajectory of the out-of-equilibrium electron population in low-bandgap semiconductor InSb, using reflective cross-polarized 2D THz time-domain spectroscopy. The 2D THz spectra show a set of distinct features at combinations of the plasma edge and vibration frequencies. We assign these features to electronic nonlinearities, using finite difference time domain simulations, and show that the nonlinear response in the first picoseconds is dominated by coherent ballistic motion of the electrons. We demonstrate that this technique can be used to investigate the landscape of the band curvature near the Γ-point such as anisotropic characteristics in the (100)-plane.
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The optical properties retrieved from the corrected phase show a good overlap both with the fitted curves and with the values reported in Ref. [37].
“We observe that the optical properties retrieved from the corrected phase show a good overlap both with the fitted curves and with the values reported in Ref. [37].”
From Robust phase correction techniques for terahertz time-domain reflection spectroscopy (2024) · cites this paper as [37]
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- Authors
- Houver, S., Huber, L., Savoini, M., Abreu, E., & Johnson, S. L.
- Affiliations
- ETH Zurich (CH)
- Venue
- 2019 44th International Conference on Infrared, Millimeter, and Terahertz Waves (IRMMW-THz)
- Publisher
- IEEE
- Published
- 2019-09
- Pages
- 1-2
- OpenAlex
- W2981939170
- Cited by
- 1
- References
- 6
- Citations by year
- 2020: 1
- FWCI
- 0.40
- Type
- conference paper
- Language
- en
- Open access
- green
- hdl.handle.net
- Licence
- Locations
- International Conference on Infrared, Millimeter, and Terahertz Waves (IRMMW-THz) (publishedVersion)
- Repository for Publications and Research Data (ETH Zurich) (submittedVersion, other-oa)
- ETH Zürich Research Collection
- 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 › Physics and Astronomy › Atomic and Molecular Physics, and Optics › Quantum and electron transport phenomena
- Keywords
- indium antimonide, ballistic electron transport, edge plasma, band curvature, anisotropy, narrow-gap semiconductors, ultrafast electron dynamics
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