Phase control of oscillator excitation under the action of ultrashort laser pulses

Abstract

The phase control of the oscillator excitation under the action of an ultrashort laser pulse with a controllable carrier-envelope phase (CEP) is investigated theoretically. Analytical expressions for the phase modulation coefficient and excitation spectral line shape are obtained in the case of a harmonic oscillator. The main features of the phase control of an inharmonic oscillator in the linear and nonlinear regimes are analyzed in the framework of the Morse model. The approach developed for an oscillator is used for the description of the phase effects during the laser excitation of a quantum system in an one-photon approximation.