Challenges
Datasets
Workspaces
Papers
Discussions
Leaderboard
Log inSign up
Challenges
Datasets
Workspaces
Papers
Discussions
Leaderboard
Blog
Job Board
Q3AS

© 2026 Aqora Quantum S.A.S.

TermsPrivacyLegal Notice

Europhysics Letters (EPL)

Electromagnetically induced two-photon transparency in rubidium atoms

Dong Wang, Jinwei Gao, J. H. Xu, Giuseppe Carlo La Rocca, F. Bassani

Published May 1, 2001• 15 citations
Publisher

Abstract

We present an experimental demonstration of electromagnetically induced two-photon transparency (EITT) in room temperature rubidium vapor. The 8 S 1/2 to 5 P 1/2 fluorescence is used to monitor the 5 S 1/2 ( F = 3) to 8 S 1/2 ( F = 3) two-photon absorption near resonance with the intermediate state 5 P 3/2 . A controlling pump laser beam is employed to coherently couple the 5 P 3/2 and 5 D 5/2 states, thus producing two dressed intermediate states which give rise to destructive interference in the two-photon transition. An induced two-photon transparency of about 80% has been obtained at resonance; our experimental findings are in good agreement with the general theory of Agarwal et al. ( Phys. Rev. Lett. , 77 (1996) 1039), when the appropriate spectroscopic parameters are used.

DOI
10.1209/epl/i2001-00267-5

Related papers

Electromagnetically induced two-photon transparency in a four-level system of rubidium atom

Dong Wang, Jin-Yue Gao, Jihua Xu +2 more

An experimental study of electromagnetically induced two- photon transparency (EITT) in rubidium atomic vapor at room temperature is presented. A four level system is considered, involving the two-photon absorption process 5S1/2 to 8S1/2 via an intermediate state 5P3/2, and the single- photon control process 5P3/2 to 5D5/2. A controlling pump laser beam is employed to coherently couple the 5P3/2 and 5D5/2 states, thus producing two dressed intermediate states, which give rise to destructive interference in the two-photon transition. Fluorescence from 8S1/2 to 5P1/2 is used to monitor the 5S1/2(Fequals3) to 8S1/2(Fequals3) two-photon absorption. An induced two-photon transparency of about 80% has been obtained at resonance; the experimental results are in good agreement with the general theory of Agarwal, when the appropriate spectroscopic parameters are employed.

Proceedings of SPIE, the International Society for Optical Engineering/Proceedings of SPIE•Apr 9, 2001•0 citations

Suppression of two-photon absorption by quantum interference

Min Yan, Edward G. Rickey, Y. Zhu

Summary form only given. Linear and nonlinear atomic response can be manipulated by quantum interference in an atomic medium in which electromagnetically induced transparency (EIT) is created by a coherent coupling field. Recently Agarwal and Harshawardhan showed that two-photon absorption may be enhanced or suppressed by quantum interference in a ladder-type atomic system (Phys. Rev. Lett. vol. 77, p. 1039, 1996). We report an experimental demonstration of two-photon suppression by quantum interference in /sup 87/Rb atoms cooled and confined in a magneto-optical trap (MOT).

Quantum Electronics and Laser Science Conference•Nov 13, 2002•2 citations

Electromagnetically induced two-photon absorption reduction in sodium vapor

Jin-Yue Gao, Suhui Yang, Dong Wang +5 more

Summary form only given. It is well known that two-photon absorption can be greatly enhanced whenever a single photon energy approaches an allowed atomic transition. If more than one intermediate state exists, the two-photon absorption can be annihilated depending on the location of the intermediate states. In case there is only one intermediate state, a control laser can be applied to couple the intermediate state with other state to create two dressed states. Then, the medium can be made transparent against two-photon absorption in the presence of multiple pathways. We report the first observation of electromagnetically induced two-photon absorption reduction in sodium vapor.

Quantum Electronics and Laser Science Conference•Jan 20, 2003•0 citations

Two-Photon Atomic Coherence Effect of Transition 5 S 1/2 −5 P 3/2 −4 D 5/2 (4 D 3/2 ) of 85 Rb atoms

Dong-Sheng Ding, Zhi‐Yuan Zhou, Bao‐Sen Shi +2 more

We experimentally observe the counterintuitive absorption peaks in the transition spectra of 5S 1/2 −5P 3/2 −4D 5/2 and 5S 1/2 −5P 3/2 −4D 3/2 in a hot 85 Rb vapor. These spectra are very different from the spectra observed via double resonance optical pumping or electromagnetically induced transparency in the same transitions. These absorption peaks are from electromagnetically induced absorption due to the two-photon atomic coherence effect. We also investigate the relations between these peaks and the powers of the coupling laser and the probe laser experimentally.

Chinese Physics Letters•Feb 1, 2012•4 citations

Observation of quantum interference between dressed states in an electromagnetically induced transparency

Yongqing Li, Min Xiao

We report on an experimental observation of quantum interference between two dressed states created by a coherent pumping laser in an electromagnetically induced transparency. In a \ensuremath{\Lambda}-type three-level atomic system in rubidium vapor, we reduce the Rabi frequency of the pumping laser in one arm down below the spontaneous decay rate of the common excited state and still observe a narrow dip with subnatural linewidth in the absorption curve of a probe beam in another arm. This clearly demonstrates that the absorption reduction at the low pumping intensity is mainly due to the interference between the two dressed states, not due to the ac--Stark-shift effect.

Physical Review A•Jun 1, 1995•148 citations

Electromagnetically induced transparency and optical switching in a rubidium cascade system

J. J. Clarke, Hongxin Chen, William Arie van Wijngaarden

Electromagnetically induced transparency is observed in a mismatched-wavelength cascade system with a room-temperature rubidium vapor cell. A cw probe laser beam monitors the 5S(1/2) ? 5P(3/2) transition while another cw laser couples the 5P(3/2) state to a higher excited state. The ratio of the observed Rabi frequencies for coupling to the 5P(3/2) ? 8D(3/2), (5/2) transitions agrees well with that predicted by use of the transition oscillator strengths. Optical switching is demonstrated with an 80-mW coupling laser beam modulated up to 1 MHz.

Applied Optics•Apr 20, 2001•64 citations
We present an experimental demonstration of electromagnetically induced two-photon transparency (EITT) in room temperature rubidium vapor. The 8 S 1/2 to 5 P 1/2 fluorescence is used to monitor the 5 S 1/2 ( F = 3) to 8 S 1/2 ( F = 3) two-photon absorption near resonance with the intermediate state 5 P 3/2 . A controlling pump laser beam is employed to coherently couple the 5 P 3/2 and 5 D 5/2 states, thus producing two dressed intermediate states which give rise to destructive interference in the two-photon transition. An induced two-photon transparency of about 80% has been obtained at resonance; our experimental findings are in good agreement with the general theory of Agarwal et al. ( Phys. Rev. Lett. , 77 (1996) 1039), when the appropriate spectroscopic parameters are used.
An experimental study of electromagnetically induced two- photon transparency (EITT) in rubidium atomic vapor at room temperature is presented. A four level system is considered, involving the two-photon absorption process 5S1/2 to 8S1/2 via an intermediate state 5P3/2, and the single- photon control process 5P3/2 to 5D5/2. A controlling pump laser beam is employed to coherently couple the 5P3/2 and 5D5/2 states, thus producing two dressed intermediate states, which give rise to destructive interference in the two-photon transition. Fluorescence from 8S1/2 to 5P1/2 is used to monitor the 5S1/2(Fequals3) to 8S1/2(Fequals3) two-photon absorption. An induced two-photon transparency of about 80% has been obtained at resonance; the experimental results are in good agreement with the general theory of Agarwal, when the appropriate spectroscopic parameters are employed.
Summary form only given. Linear and nonlinear atomic response can be manipulated by quantum interference in an atomic medium in which electromagnetically induced transparency (EIT) is created by a coherent coupling field. Recently Agarwal and Harshawardhan showed that two-photon absorption may be enhanced or suppressed by quantum interference in a ladder-type atomic system (Phys. Rev. Lett. vol. 77, p. 1039, 1996). We report an experimental demonstration of two-photon suppression by quantum interference in /sup 87/Rb atoms cooled and confined in a magneto-optical trap (MOT).
Summary form only given. It is well known that two-photon absorption can be greatly enhanced whenever a single photon energy approaches an allowed atomic transition. If more than one intermediate state exists, the two-photon absorption can be annihilated depending on the location of the intermediate states. In case there is only one intermediate state, a control laser can be applied to couple the intermediate state with other state to create two dressed states. Then, the medium can be made transparent against two-photon absorption in the presence of multiple pathways. We report the first observation of electromagnetically induced two-photon absorption reduction in sodium vapor.
We experimentally observe the counterintuitive absorption peaks in the transition spectra of 5S 1/2 −5P 3/2 −4D 5/2 and 5S 1/2 −5P 3/2 −4D 3/2 in a hot 85 Rb vapor. These spectra are very different from the spectra observed via double resonance optical pumping or electromagnetically induced transparency in the same transitions. These absorption peaks are from electromagnetically induced absorption due to the two-photon atomic coherence effect. We also investigate the relations between these peaks and the powers of the coupling laser and the probe laser experimentally.
We report on an experimental observation of quantum interference between two dressed states created by a coherent pumping laser in an electromagnetically induced transparency. In a \ensuremath{\Lambda}-type three-level atomic system in rubidium vapor, we reduce the Rabi frequency of the pumping laser in one arm down below the spontaneous decay rate of the common excited state and still observe a narrow dip with subnatural linewidth in the absorption curve of a probe beam in another arm. This clearly demonstrates that the absorption reduction at the low pumping intensity is mainly due to the interference between the two dressed states, not due to the ac--Stark-shift effect.
Electromagnetically induced transparency is observed in a mismatched-wavelength cascade system with a room-temperature rubidium vapor cell. A cw probe laser beam monitors the 5S(1/2) ? 5P(3/2) transition while another cw laser couples the 5P(3/2) state to a higher excited state. The ratio of the observed Rabi frequencies for coupling to the 5P(3/2) ? 8D(3/2), (5/2) transitions agrees well with that predicted by use of the transition oscillator strengths. Optical switching is demonstrated with an 80-mW coupling laser beam modulated up to 1 MHz.