Two-photon absorption in strong fields

    Authors

    M. Alexanian;S. Bose

    Comments

    Authors: contact us about adding a copy of your work at STARS@ucf.edu

    Abbreviated Journal Title

    J. Lumines.

    Keywords

    two-photon absorption; coherence in two-photon absorption; 2-PHOTON ABSORPTION; Optics

    Abstract

    We present a theoretical formalism to describe simultaneous absorption of two single-mode photons by an atom. The appropriate interaction Hamiltonian, derived by a unitary transformation, is used to obtain a very general master equation for the photon density operator that includes the effects of Stark shifts. The special case in which the atomic levels are in resonance with the field, i.e., zero detuning, is considered. The master equation for the photon probability predicts a linear dependence of absorption on intensity, rather than the usual quadratic dependence, and results in a slower rate of absorption as a function of time. Coherence in the presence of two-photon absorption is also demonstrated. (C) 1999 Elsevier Science B.V. All rights reserved.

    Journal Title

    Journal of Luminescence

    Volume

    83-4

    Publication Date

    1-1-1999

    Document Type

    Article; Proceedings Paper

    Language

    English

    First Page

    167

    Last Page

    169

    WOS Identifier

    WOS:000083914400029

    ISSN

    0022-2313

    Share

    COinS