Physics

The speed limit of optoelectronics

M. Ossiander, K. Golyari, et al.

This groundbreaking research delves into the speed limits of optoelectronics, showcasing how controlling Bloch wavepacket motion using visible light can lead to high-speed current control. The findings, presented by an impressive team of researchers, suggest a fundamental limit for classical signal processing and the potential for solid-state optoelectronics to reach up to 1 PHz frequency.

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Abstract

This paper investigates the speed limits of optoelectronics by controlling Bloch wavepacket motion in a wide-gap dielectric using the electric field of visible light. Single-photon excitation populates the conduction band within approximately one femtosecond, enabling sampling of optical fields and tracking charge motion. The study identifies population transfer to adjacent bands and group velocity inversion as the limiting factors for high-speed current control, suggesting a fundamental limit for classical signal processing and the feasibility of solid-state optoelectronics up to 1 PHz frequency.

Publisher

Nature Communications

Published On

Mar 25, 2022

Authors

M. Ossiander, K. Golyari, K. Scharl, L. Lehnert, F. Siegrist, J. P. Bürger, D. Zimin, J. A. Gessner, M. Weidman, I. Floss, V. Smejkal, S. Donsa, C. Lemell, F. Libisch, N. Karpowicz, J. Burgdörfer, F. Krausz, M. Schultze

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