We study the transient response dynamics of^(87)Rb atomic vapor buffered in 8 torr Ne gas through an electromagnetically induced transparency configured inΛ-scheme.Experimentally,the temporal transmission spectra ver...We study the transient response dynamics of^(87)Rb atomic vapor buffered in 8 torr Ne gas through an electromagnetically induced transparency configured inΛ-scheme.Experimentally,the temporal transmission spectra versus probe detuning by switching on and off the coupling one show complex structures.The transmitted probe light intensity drops to a minimum value when the coupling light turns off,showing a strong absorption.Even at the moment of turning on the coupling light at a subsequent delayed time,the atomic medium shows a fast transient response.To account for the transient switching feature,in the time-dependent optical Bloch equation,we must take the transverse relaxation dephasing process of atomic vapor into account,as well as the fluorescence relaxation along with the optical absorption.This work supplies a technique to quantify the transverse relaxation time scale and to sensitively monitor its variation along the environment by observing the transient dynamics of coherent medium,which is helpful in characterizing the coherent feature of the atomic medium.展开更多
基金the National Natural Science Foundation of China(Grant Nos.12074388 and 12004393)。
文摘We study the transient response dynamics of^(87)Rb atomic vapor buffered in 8 torr Ne gas through an electromagnetically induced transparency configured inΛ-scheme.Experimentally,the temporal transmission spectra versus probe detuning by switching on and off the coupling one show complex structures.The transmitted probe light intensity drops to a minimum value when the coupling light turns off,showing a strong absorption.Even at the moment of turning on the coupling light at a subsequent delayed time,the atomic medium shows a fast transient response.To account for the transient switching feature,in the time-dependent optical Bloch equation,we must take the transverse relaxation dephasing process of atomic vapor into account,as well as the fluorescence relaxation along with the optical absorption.This work supplies a technique to quantify the transverse relaxation time scale and to sensitively monitor its variation along the environment by observing the transient dynamics of coherent medium,which is helpful in characterizing the coherent feature of the atomic medium.
