Title :
Two-photon optical bistability in polar molecules: vibrational coupling effects
Author :
Antón, Miguel A. ; Gonzalo, Isabel
Author_Institution :
Dept. de Opt., Univ. Complutense de Madrid, Spain
fDate :
6/1/1995 12:00:00 AM
Abstract :
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
Keywords :
electric moments; nonlinear optical susceptibility; optical bistability; two-photon processes; vibrational states; excited electronic system; field-dependent effective transition dipole momen; polar molecules; single-beam two-photon optical bistability; susceptibility; two-level nonpolar system; two-level system; two-photon optical bistability; unequal electric dipole moments; unitary transformations; vibrational coupling effects; vibrational normal mode; Delay; Nonlinear optics; Optical bistability; Optical coupling; Optical mixing; Optical polymers; Optical signal processing; Phonons; Resonance; Ultrafast optics;
Journal_Title :
Quantum Electronics, IEEE Journal of