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DC Field | Value | Language |
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dc.contributor.author | Narayanan, Andal | - |
dc.contributor.author | Madathil, Preethi Thekkile | - |
dc.contributor.author | Manjappa, Manukumara | - |
dc.date.accessioned | 2011-04-08T07:39:41Z | - |
dc.date.available | 2011-04-08T07:39:41Z | - |
dc.date.issued | 2010-09 | - |
dc.identifier.citation | Journal of the Optical Society of America B, 2010, Vol. 27, p1778 | en |
dc.identifier.issn | 1520-8540 (Online) | - |
dc.identifier.issn | 0740-3224 | - |
dc.identifier.uri | http://hdl.handle.net/2289/4016 | - |
dc.description | Restricted Access. | en |
dc.description.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 87Rb 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. | en |
dc.language.iso | en | en |
dc.publisher | Optical Society of America | en |
dc.relation.uri | http://dx.doi.org/10.1364/JOSAB.27.001778 | en |
dc.rights | 2010 Optical Society of America | en |
dc.title | Directional optical switch using interacting dark states | en |
dc.type | Article | en |
Appears in Collections: | Research Papers (LAMP) |
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2010_JoptSAmB_27_1778.pdf Restricted Access | Restricted Access | 350.96 kB | Adobe PDF | View/Open Request a copy |
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