Two-photon interference spectra at the sum-frequency generation of a bichromatic field interacting with a three-level atom

摘要: We have calculated the spectral functions for a number of induced excitations near sum-frequency generation bichromatic field interacting with three-level atom in cascade configuration. Although two-photon spontaneous emission is electric dipole forbidden, there are peaks whose subnatural line widths and heights depend on intensities field. At low both laser fields, maximum take positive, zero, negative values, indicating that physical processes absorption (attenuation), dark resonance (nonabsorbing state), stimulated (amplification) likely to occur at two respectively. The derived results graphically presented discussed.