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Phys Rev Lett. 2007 Mar 16;98(11):113003. Epub 2007 Mar 15.

Coherent optical detection of highly excited Rydberg states using electromagnetically induced transparency.

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  • 1Department of Physics, Durham University, Rochester Building, South Road, Durham DH1 3LE, United Kingdom.


We demonstrate coherent optical detection of highly excited Rydberg states (up to n=124) using electromagnetically induced transparency (EIT), providing a direct nondestructive probe of Rydberg energy levels. We show that the EIT spectra allow direct optical detection of electric field transients in the gas phase, and we extend measurements of the fine structure splitting of the nd series up to n=96. Coherent coupling of Rydberg states via EIT could also be used for cross-phase modulation and photon entanglement.

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