Enhancement of two-photon transition rate by selectively removing certain frequency comb teeth

TL;DR

This paper demonstrates that selectively removing certain teeth from a frequency comb enhances the resonant two-photon transition rate in rubidium-87, combining experimental results with theoretical insights into quantum coherent control.

Contribution

It introduces a novel spectral phase manipulation technique that significantly improves two-photon transition rates using frequency combs, supported by both experiments and theory.

Findings

Transition rate improved by over 1.8 times

Spectral phase manipulation effectively controls nonlinear interactions

Theoretical model explains the physical mechanism of enhancement

Abstract

We present experiments demonstrating an enhancement of resonant two-photon transition rate in 87Rb utilizing spectral phase manipulation of the excitation frequency comb. By selectively removing certain comb teeth, the resonant two-photon transition rate can be improved, and reach a factor of more than 1.8. The femtosecond pulse-train excitation of two-photon transition is investigated theoretically based on general multiphoton transitions and the results are compared with the experiments. The theory presented here gives a clear insight of physical mechanism of this quantum coherent control and indicates that it is simple, effective and universal for nonlinear interactions between frequency combs and matters.