Double resonance optical pumping effects in electromagnetically induced transparency

Abstract

We present the double resonance optical pumping (DROP) effect of ladder-type electromagnetically induced transparency (EIT) in the 5S1/2-5P3/2-5D5/2 transition of 87Rb atoms. When many atoms of the ladder-type atomic system are simultaneously resonant with the two laser fields, the population of one ground state can be optically pumped into another ground state through intermediate states and excited states. In this paper, we reveal that most previous results for the ladder-type EIT include the DROP effect. When the probe laser is very weak and the coupling laser is strong, we can observe the double structure transmittance spectrum, a narrow spectrum due to the EIT and a broad spectrum due to the DROP, in the 5S1/2(F=2)-5P3/2(F'=3)-5D5/2(F"=4) cycling transition.

Crossover from electromagnetically induced transparency to Autler–Townes splitting in open ladder systems with Doppler broadening

“…From the above result we can distinguish three different regions, i.e. the EIT Our results on the characters of the quantum interference effect in the hot Rubidium atomic gases are consistent with those obtained in the experiments [23,30]. According to our analysis, the experiments carried out in Refs.…”

Narrow-linewidth double-resonance optical pumping spectrum due to electromagnetically induced transparency in ladder-type inhomogeneously broadened media

“…The spectra with two components also can be observed in normal EIT arrangement (CTP configuration) [9], where the coupling laser's frequency is fixed while the probe laser is scanned over the transition from the ground state to the intermediate state. We record the results as shown in trace (a) in Fig.…”

“…In fact, in a DROP experimental system, there exists an atomic coherence effect such as electromagnetically induced transparency (EIT), which has received less attention. Just recently, the optical pumping effect in EIT has been brought into focus [8,9]. For a -type atomic system, Ye and Zibrov studied the effect on the EIT signal from optical pumping by the coupling laser [10].…”

Comparison between transparencies of 5S_1/2-5P_3/2-4D_5/2 and 5S_1/2-5P_3/2-5D_5/2 transitions of ^87Rb atoms

“…The main cause of the transparency of the 5S 1∕2 -5P 3∕2 -4D 5∕2 transition was reported to be doubleresonance optical pumping (DROP), where the population of one ground state is optically pumped into another ground state through an intermediate state after being excited into the excited state [14,15]. However, the DROP effect also contributes to the 5S 1∕2 -5P 3∕2 -5D 5∕2 transition, and the transparency of the hyperfine structures of the 5S 1∕2 F 2-5P 3∕2 F 0 3-5D 5∕2 F 00 2; 3 transition is also due to DROP, except the transparency of the 5S 1∕2 F 2-5P 3∕2 F 0 3-5D 5∕2 F 00 4 cycling transition [16,17]. Although, transparency due to DROP effects in the 5S 1∕2 -5P 3∕2 -4D 5∕2 and 5S 1∕2 -5P 3∕2 -5D 5∕2 transitions has been reported [13,17], the influence of the Doppler shift of the two-photon resonance on the DROP effect in these two transitions has not.…”