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DOE OSTI · 21541387

Electromagnetically induced transparency in a five-level {Lambda} system dominated by two-photon resonant transitions

Dong, Yan·Jinwei, Gao·Qianqian, Bao·Hong, Yang·Heng, Wang·Jinhui, Wu
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Abstract

We study the steady optical response of a five-level atomic system in the parametric region where resonant two-photon transitions are much stronger than far-detuned single-photon transitions. We find that the concurrent absorption of two weak probe fields can be well suppressed in a narrow spectral region to attain electromagnetically induced transparency (EIT) via quantum destructive interference between different two-photon transition pathways. To gain a deeper insight into relevant physics, we adiabatically reduce this five-level system with trivial single-photon transitions into a three-level system with vanishing single-photon transitions by deriving an effective Hamiltonian. The two systems have almost the same two-photon absorption spectra exhibiting typical EIT features but are a little different in fine details. This means that most characteristics of two-photon quantum destructive interference are reserved after the adiabatic elimination approximation. In addition, we verify by numerical calculations that the two-photon EIT spectra are insensitive to the dipole-dipole interaction of cold Rydberg atoms when the uppermost level has a high principle quantum number.

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74 ATOMIC AND MOLECULAR PHYSICSABSORPTIONABSORPTION SPECTRAADIABATIC PROCESSESATOMSBOSONSDIPOLESELECTROMAGNETIC RADIATIONELEMENTARY PARTICLESENERGY LEVELSEXCITED STATESHAMILTONIANSINTERACTIONSINTERFERENCEMASSLESS PARTICLESMATHEMATICAL OPERATORSMULTIPOLESOPACITYOPTICAL PROPERTIESPHOTONSPHYSICAL PROPERTIESQUANTUM OPERATORSRADIATIONSRYDBERG STATESSORPTIONSPECTRA

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Dong, Yan, Jinwei, Gao, Qianqian, Bao, Hong, Yang, Heng, Wang, Jinhui, Wu. 2011-03-15. Electromagnetically induced transparency in a five-level {Lambda} system dominated by two-photon resonant transitions. https://doi.org/10.1103/physreva.83.033830

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