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IEEE/LEOS Summer Topical Meetings

Opto-electronic carrier-envelope-phase detection

Christian Jirauschek, Juhi K. Chandalia, Lingze Duan, Franz X. Kärtner, Oliver D. Mücke, T. Trischler, Martin Wegener

Published Jun 3, 2004• 0 citations
Publisher

Abstract

The possibility of detecting the carrier-envelope (CE-) phase by measuring directly the inversion in a two-level medium after excitation with an off-resonant few-cycle laser pulse is demonstrated by numerical simulations.
DOI
10.1109/leosst.2003.1224341

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We theoretically study the carrier-envelope phase-dependent inversion generated in a two-level system by excitation with a few-cycle pulse. On the basis of the invariance of the inversion under time reversal of the exciting field, parameters are introduced to characterize the phase sensitivity of the induced inversion. Linear and nonlinear phase effects are numerically studied for rectangular and sinc-shaped pulses. Furthermore, analytical results are obtained in the limits of weak fields, as well as strong dephasing, and by nearly degenerate perturbation theory for sinusoidal excitation. The results show that the phase-sensitive inversion in the ideal two-level system is a promising route for constructing carrier-envelope phase detectors.
The response of a two-level system to a few-cycle pulse pair has been investigated with a special focus on the relation between population inversion and the carrier-envelope phases (CEPs) of the two pulses. The goal is to explore possible schemes of coherent control based on sequential ultrafast pulses. Simulation results indicate a close CEP-inversion relation, which stems from the coherent nature of the interaction. The impact of the pulse amplitudes is evaluated and is shown to create weak-field and strong-field interaction regions with drastically different characteristics. The important role of carrier-wave Rabi flopping in defining these characteristics is also analyzed. Finally, advantages of the method and experimental realization are discussed.