Enhanced index of refraction in four-wave mixing media
Abstract
Refractive index enhancement accompanied by vanishing absorption in a four-level atomic system interacting with two control and two probe fields in a regime of four-wave mixing (FWM) has been predicted and studied in the present work. We analyzed the maximal index enhancement in the four-level FWM system and gave index estimates for a real atomic gas of K, taking into account its multilevel structure and collisional and Doppler broadenings at large atomic densities. We also discussed how vanishing absorption with no nearby amplification can be realized in a two species system, consisting of a four-level FWM and a two-level system, where the latter provides additional absorption for one of the probe fields. We numerically estimated the index change in a system composed of K and K gases.
Keywords
Cite
@article{arxiv.1308.3884,
title = {Enhanced index of refraction in four-wave mixing media},
author = {Elena Kuznetsova and Renuka Rajapakse and Susanne F. Yelin},
journal= {arXiv preprint arXiv:1308.3884},
year = {2015}
}