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Sub-Doppler and sub-natural narrowing of an absorption line |
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| Authors: | N Gavra M Rosenbluh T Zigdon AD Wilson-Gordon H Friedmann |
| Institution: | aResnick Institute for Advanced Technology and Department of Physics, Bar-Ilan University, Ramat Gan 52900, Israel bDepartment of Chemistry, Bar-Ilan University, Ramat Gan 52900, Israel |
| Abstract: | We experimentally demonstrate the double dark resonance windows characteristic of a four level tripod system such as the D2 line of 87Rb where the Fg = 1, mg = −1, 0, 1 Zeeman sublevels form the bottom three levels and the Fe = 0 state is the upper level. Between the double dark resonance windows, a very narrow absorption resonance is observed whose line-width is shown to be sub-Doppler and sub-natural. The sharp absorptive resonance is characterized as a function of applied magnetic field and pump laser power. |
| Keywords: | Atomic coherence Optical pumping Level crossing |
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