Abstract：
:A two step excitation scheme in hot atomic sodium vapor is experimentally investigated. The observed effects reflect a coupling between the 32S, 32P and the 32D states. We present the relative dependence on detuning of the two utilized lasers around λ = 589 nm and 819 nm. Unlike expected, we achieve a higher detuning dependence of the probe and the coupling laser by a factor of approximately three. The presented work aimed for a Rydberg excitation and quantum light storage. Such schemes are usually implemented with a red laser on the D-line transition and a coupling laser of shorter (typically blue) wavelength. Due to the fact that higher P-Rydberg states are approximately two times higher in energy than the 32D state, a two photon transition from the atomic excited 32P state to a Rydberg P state is feasible. This might circumvent laser frequency doubling whereby only two lasers might mediate a three photon process. The scheme of adding three k-vectors allows for electromagnetically induced transparency experiments in which the resulting k-vector can be effectively reduced to zero. By measurements utilizing electric fields and an analysis of the emission spectrum of the atomic vapor, we can exclude the excitation of the P-P two photon transition.
journal_name
Sci Repjournal_title
Scientific reportsauthors
Docters B,Wrachtrup J,Gerhardt Idoi
10.1038/s41598-017-12089-wsubject
Has Abstractpub_date
2017-09-18 00:00:00pages
11760issue
1issn
2045-2322pii
10.1038/s41598-017-12089-wjournal_volume
7pub_type
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