Abstract

We experimentally observe a non-linear absorption resonance in one of the two probe beams of a double Λ system which is interacting with three optical beams. This probe beam counterpropagates to the other two beams, both of which are co-propagating. The absorption resonance in this probe beam arises due to interaction between the dark states of the double Λ created by the co-propagating beams. The double Λ configuration of levels is in the D2 hyperfine manifold of R87b atoms, and the interaction is studied at room temperature. The non-linear absorption resonance is shown to be a three-photon process arising whenever the two co-propagating beams satisfy the two-photon Raman condition, necessary for electromagnetically induced transparency. Through a dressed state analysis, we show that the absorption feature is a result of interference between the absorption pathways to the excited states, from the ground states of the double Λ. The non-linear nature of the probe beam absorption enables it to perform like a directional optical switch. This absorption switch operates conditioned on non-absorption of a single photon of the same frequency due to a coherent process, in a beam traveling in the opposite direction.

© 2010 Optical Society of America

Full Article  |  PDF Article
OSA Recommended Articles
Optical switching using controlled two-photon transition

Chin-Chun Tsai, Yi-Chi Lee, and Hsiang-Chen Chui
J. Opt. Soc. Am. B 31(6) 1347-1350 (2014)

Electromagnetically induced transparency in a V-type multilevel system of Na vapor

Yoshitaka Hoshina, Nobuhito Hayashi, Kosuke Tsubota, Ichiro Yoshida, Kotaro Shijo, Ryuta Sugizono, and Masaharu Mitsunaga
J. Opt. Soc. Am. B 31(8) 1808-1813 (2014)

Coherent Raman beats from dark states

Ken-ichi Harada, Koji Motomura, Takanori Koshimizu, Hirotaka Ueno, and Masaharu Mitsunaga
J. Opt. Soc. Am. B 22(5) 1105-1111 (2005)

References

You do not have subscription access to this journal. Citation lists with outbound citation links are available to subscribers only. You may subscribe either as an OSA member, or as an authorized user of your institution.

Contact your librarian or system administrator
or
Login to access OSA Member Subscription

Cited By

You do not have subscription access to this journal. Cited by links are available to subscribers only. You may subscribe either as an OSA member, or as an authorized user of your institution.

Contact your librarian or system administrator
or
Login to access OSA Member Subscription

Figures (4)

You do not have subscription access to this journal. Figure files are available to subscribers only. You may subscribe either as an OSA member, or as an authorized user of your institution.

Contact your librarian or system administrator
or
Login to access OSA Member Subscription

Equations (9)

You do not have subscription access to this journal. Equations are available to subscribers only. You may subscribe either as an OSA member, or as an authorized user of your institution.

Contact your librarian or system administrator
or
Login to access OSA Member Subscription

Metrics

You do not have subscription access to this journal. Article level metrics are available to subscribers only. You may subscribe either as an OSA member, or as an authorized user of your institution.

Contact your librarian or system administrator
or
Login to access OSA Member Subscription