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DY: Fachverband Dynamik und Statistische Physik

DY 35: Poster: Quantum Dynamics and Many-body Systems

DY 35.21: Poster

Wednesday, March 20, 2024, 15:00–18:00, Poster D

Giant DC Residual Current Generated by Subcycle Laser Pulses — •Adrian Seith, Ferdinand Evers, and Jan Wilhelm — Institute of Theoretical Physics and Regensburg Center for Ultrafast Nanoscopy, University of Regensburg, 93053 Regensburg

On an ultrashort timescale, experimental indications have been reported suggesting that laser pulses can produce currents that survive long after the illumination has died out. Such residual currents (remnants) may have applications in petahertz logical gates. The amplitude of remnants strongly depends on the pulse shape. We develop an analytical formula that allows to optimize the pulse shape; we predict remnants that exceed the values observed so far by orders of magnitude. In fact, remnants can become almost as strong as the peak current under irradiation.

Keywords: Ultrafast Dynamics; Residual Currents; Semiconductor Bloch; Topological Insulator