Quasi-phase-matching slow light propagation in efficient four-wave mixing media

Abstract

Quantum frequency converter which can maintain the state of quantum bits during conversion is an important device in optical quantum information process In this thesis we theoretically study the efficient four-wave mixing scheme based on electromagnetically induced transparency (EIT) including detuned four-wave mixing spatially modulated four-wave mixing and backward four-wave mixing then explain why we choose backward scheme to carry out wavelength conversion After compensating phase mismatching by adjusting two photon detuning we have observed 91 2% conversion efficiency (CE) using quasi-phase matching backward four-wave mixing scheme at an optical depth of 130 in cold rubidium atoms which is almost the same as the theoretical prediction Thus this scheme has been confirm to be a highly potential way to realized quantum frequency converter

Date of Award	2020
Original language	English
Supervisor	Yong-Fan Chen (Supervisor)