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Two-photon optical bistability in polar molecules: vibrational coupling effects

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2 Author(s)
Anton, M.A. ; Dept. de Opt., Univ. Complutense de Madrid, Spain ; Gonzalo, I.

Single-beam two-photon optical bistability in a two-level system where the levels have unequal electric dipole moments is analyzed theoretically. By means of unitary transformations the system is transformed into a two-level nonpolar system with a field-dependent effective transition dipole moment. Two-photon optical bistability is found to be favored as the difference between the dipole moments grows. When the excited electronic system is coupled to a vibrational normal mode of the nuclei, the susceptibility becomes three-valued and consequently a different type of optical bistability appears, which can coexists with the previous one

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Quantum Electronics, IEEE Journal of  (Volume:31 ,  Issue: 6 )