Low-light-level ladder-type electromagnetically induced transparency and two-photon absorption

Zong Syun He, Jing Yuan Su, Hong Ren Chen, Wei Fu Chen, Meng Huang Sie, Jyun Yan Ye, Chin Chun Tsai

研究成果: Article同行評審

2 引文 斯高帕斯(Scopus)

摘要

Ladder-type electromagnetically induced transparency (EIT) and two-photon absorption (TPA) under a low-light level of probe (0.2 μW/cm2 (0.06Γ2)) and weak coupling power for a cesium atom at room temperature are investigated. Reduction of the fluorescence on the TPA in a three-level system via EIT interference is clearly observed and analyzed under the low probe Rabi frequency of about 0.30 MHz to avoid the affects from the vicinity of intermediate hyperfine states. The transparency ratio of EIT derived from the reduction of fluorescence is about 25%. Additionally, the EIT linewidth observed can be as narrow as 2.64 MHz, while the coupling Rabi frequency is around 2.66 MHz. By solving the steady-state optical Bloch equations, the numerical simulation spectra are in good agreement with EIT and TPA. According to our investigations, the Doppler velocity averaging effect over the thermal atoms reducing the linewidth of the EIT signal proves the advantage of observing the EIT in the room-temperature cell.

原文English
頁(從 - 到)2485-2490
頁數6
期刊Journal of the Optical Society of America B: Optical Physics
31
發行號10
DOIs
出版狀態Published - 2014 十月 1

All Science Journal Classification (ASJC) codes

  • 統計與非線性物理學
  • 原子與分子物理與光學

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