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Intersubband Shift Currents in Asymmetric Quantum Wells as a Source of Mono-Cycle Terahertz Pulses

M. Runge, T. Kang, K. Biermann, K. Reimann, M. Woerner, and T. Elsaesser

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Abstract

Transient electronic shift currents generated upon intersubband excitation of asymmetric AlGaAs quantum wells efficiently emit mono-cycle terahertz (THz) pulses. The mechanism is characterized and separated from difference-frequency generation by nonlinear two-dimensional THz spectroscopy.

© 2022 The Author(s)

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