Field-dependent THz transport nonlinearities in semiconductor nano structures.
Wach Q, Quick MT, Ayari S, Achtstein A (2024)
Physical chemistry chemical physics : PCCP.
Zeitschriftenaufsatz
| E-Veröff. vor dem Druck | Englisch
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Autor*in
Wach, Quentin;
Quick, Michael T;
Ayari, Sabrine;
Achtstein, AlexanderUniBi
Einrichtung
Abstract / Bemerkung
Charge transport nonlinearities in semiconductor quantum dots and nanorods are studied. Using a density matrix formalism, we retrieve the field-dependent nonlinear mobility and show the possibility of intra-pulse gain. We further demonstrate that the dynamics of master equations can be captured in an analytical formula for the field-dependent charge carrier mobility, e.g. for two-level systems. This equation extends the linear response theory based Kubo-Greenwood result to nonlinear processes at elevated field strength, easily reached in THz transport spectroscopy. With these tools we analyze the field strength, chirp, temperature and dephasing dependence of the charge carrier mobility in the model system of CdSe quantum dots and wires. Stark broadening and Rabi splitting result in strong alterations of the mobility spectra, pronounced at low temperatures. The mobility spectra are strongly temperature and pulse shape dependent in the nonlinear regime. The findings are of immediate interest e.g. for nonlinear THz generation, conversion and amplification in 6G technology and nano electronics. Our results further enable experimentalists to fit and understand measured charge transport nonlinearities with analytical expressions and to design nanosystems with engineered material properties.
Erscheinungsjahr
2024
Zeitschriftentitel
Physical chemistry chemical physics : PCCP
Urheberrecht / Lizenzen
eISSN
1463-9084
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https://pub.uni-bielefeld.de/record/2989109
Zitieren
Wach Q, Quick MT, Ayari S, Achtstein A. Field-dependent THz transport nonlinearities in semiconductor nano structures. Physical chemistry chemical physics : PCCP. 2024.
Wach, Q., Quick, M. T., Ayari, S., & Achtstein, A. (2024). Field-dependent THz transport nonlinearities in semiconductor nano structures. Physical chemistry chemical physics : PCCP. https://doi.org/10.1039/d4cp00952e
Wach, Quentin, Quick, Michael T, Ayari, Sabrine, and Achtstein, Alexander. 2024. “Field-dependent THz transport nonlinearities in semiconductor nano structures.”. Physical chemistry chemical physics : PCCP.
Wach, Q., Quick, M. T., Ayari, S., and Achtstein, A. (2024). Field-dependent THz transport nonlinearities in semiconductor nano structures. Physical chemistry chemical physics : PCCP.
Wach, Q., et al., 2024. Field-dependent THz transport nonlinearities in semiconductor nano structures. Physical chemistry chemical physics : PCCP.
Q. Wach, et al., “Field-dependent THz transport nonlinearities in semiconductor nano structures.”, Physical chemistry chemical physics : PCCP, 2024.
Wach, Q., Quick, M.T., Ayari, S., Achtstein, A.: Field-dependent THz transport nonlinearities in semiconductor nano structures. Physical chemistry chemical physics : PCCP. (2024).
Wach, Quentin, Quick, Michael T, Ayari, Sabrine, and Achtstein, Alexander. “Field-dependent THz transport nonlinearities in semiconductor nano structures.”. Physical chemistry chemical physics : PCCP (2024).
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2024-05-15T08:29:15Z
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