Resonant dynamic Stark shift as a tool in strong-field quantum control: calculation and application for selective multiphoton ionization of sodium

A method for determining the resonant dynamic Stark shift (RDSS), based on wave-packet calculations of the populations of quantum states, is presented. The RDSS data are used to analyze selective multiphoton ionization of sodium.

INTERSUBBAND TRANSITIONS IN COUPLED QUANTUM WELLS UNDER AN INTENSE LASER FIELD

We consider the electrons bound in the conduction band of a double quantum well interacting with a strong monochromatic electromagnetic field in the terahertz (THz) region. Using a variant of the stationary perturbation theory, we have obtained the quasienergies and Floquet eigenvectors. The main features of power broadening and the dynamic Stark shift are retained. The sensitivity to the field parameters, such as intensity and frequency of the electric field on the state populations, can be used in various optical semiconductor device applications.

PHOTON-ASSISTED INTERSUBBAND TRANSITIONS IN A QUANTUM WIRE

We investigate the response of electrons confined in a quantum wire in the presence of intense terahertz (THz) electric field. An exact and powerful nonperturbative fundamental approach of Floquet theory is employed to solve the equation of motion for resonantly driven intersubband transitions. Several interesting features namely dynamic Stark shift, power broadening and hole-burning are observed with the variation in electric field strength. In addition, the degeneracy between several excited states is found to be removed in the presence of high electric field.