Coherent control of third-harmonic generation and multiphoton ionization: Experimental and theoretical studies

Year: 2005

Authors: Buffa R., Cavalieri S., Eramo R., Fini L.

Autors Affiliation: Dipartimento di Fisica, Universitá di Siena, and Istituto Nazionale per la Fisica della Materia (INFM), Via Roma 56, I-53100 Siena, Italy;
Dipartimento Fisica, Universitá di Firenze and INFM, Via Sansone 1, I-50019 Sesto Fiorentino, Firenze, Italy;
European Laboratory for Non-Linear Spectroscopy (LENS), Via N. Carrara 1, I-50019 Sesto Fiorentino, Firenze, Italy;
INFM CRS-SOFT, Universitá di Roma La Sapienza, P. le A. Moro 2, 00185 Roma, Italy

Abstract: The effect of temporal coherent control on the two-photon-resonant third-harmonic generation and multiphoton ionization into the continuum states of an atomic system is experimentally and theoretically investigated by means of a pair of partially incoherent, identical laser pulses. The evidence of quantum interference as a function of the delay between the pulses is reported. The transition from the resonant to the nonresonant case is also shown. The obtained results agree with the prediction of a theoretical model showing that the onset of quantum interference appears to be related to the coherence time of the laser radiation, which is much shorter than the pulse duration. Copyright

Journal/Review: LASER PHYSICS

Volume: 15 (2)      Pages from: 334  to: 340

KeyWords: Functions; Harmonic generation; Laser pulses; Natural frequencies; Optical radar; Photoionization; Spectroscopic analysis, Coherent control; Multiphoton ionization; Pulse duration; Third-harmonic generation, Photons

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