Controlling Rydberg-dressed four-wave mixing via dual electromagnetically induced transparency windows

Abstract

Rydberg-dressed four-wave mixing (FWM) is theoretically and experimentally demonstrated with two electromagnetically induced transparency (EIT) windows generated in a Y-type 85 Rb atomic configuration. Such dressing effect related to Rydberg states can lead to enhancement and suppression in the FWM process, which can be manipulated by the frequency detuning, Rabi frequency, and polarization of laser fields. Particularly, with the enhancement condition satisfied, coexisting FWM and Rydberg six-wave mixing (SWM) peaks with ultranarrow linewidth (much less than 30 MHz) are simultaneously observed. The controllable enhancement and suppression in a Rydberg-EIT medium can provide a novel nondestructive nonlinear method to investigate the spectrum involving Rydberg excitation in the atomic ensemble above room temperature.

Microwave assisted efficient non-degenerate four-wave mixing in pulsed regime

“…Many theoretical and experimental studies have been performed to demonstrate the FWM process in atomic system. Four level N-type [15][16][17][18], Y-type [19], double Λ-type [20][21][22], diamond-type [23][24][25][26][27] atomic systems become very popular for the investigation of FWM process. In a four level atomic system, three electromagnetic fields of frequencies ω 1 , ω 2 , ω 3 nonlinearly interact with the atoms and generate FWM signal which has a frequency ω g = ± ω 1 ± ω 2 ± ω 3 .…”

Parametric amplification of Rydberg six- and eight-wave mixing processes

“…For these applications, detecting Rydberg dressing-state effect and the interactions among the Rydberg atoms nondestructively is a basic requirement. Recently, electromagnetically induced transparency (EIT) [8][9][10][11][12] and multiwave mixing (MWM) [13][14][15] as nondestructive optical detection methods [16,17] have been proposed and utilized for detecting Rydberg atoms [18,19] where the Rydberg atoms are not ionized. The multichannel nature of the MWM process allows for multichannel information processing related to Rydberg states.…”