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Excitonic Dynamical Franz-Keldysh Effect

K. B. Nordstrom·K. Johnsen·S. J. Allen·A. -P. Jauho·B. Birnir·J. Kono·T. Noda·H. Akiyama·H. Sakaki
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Abstract

The Dynamical Franz-Keldysh Effect is exposed by exploring near-bandgap absorption in the presence of intense THz electric fields. It bridges the gap between the DC Franz- Keldysh effect and multi-photon absorption and competes with the THz AC Stark Effect in shifting the energy of the excitonic resonance. A theoretical model which includes the strong THz field non-perturbatively via a non-equilibrium Green Functions technique is able to describe the Dynamical Franz-Keldysh Effect in the presence of excitonic absorption.

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K. B. Nordstrom, K. Johnsen, S. J. Allen, A. -P. Jauho, B. Birnir, J. Kono, T. Noda, H. Akiyama, H. Sakaki. 1998-04-23. Excitonic Dynamical Franz-Keldysh Effect. https://doi.org/10.1103/physrevlett.81.457

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