Three-level gas systems and their interaction with radiation

Tracy Tsai

H G Venkatesh, Shyamal Guha, Satyanarayana Prasad

Jitendra S. Goela

Lewis S. Klein, Michel Giraud, A. Ben‐Reuven

The effect of a strong perturbing radiation field on spectral lines is studied using an extension of the Kubo-Zwanzig-Fano relaxation formalism. The problem of a dilute gas interacting with a strong perturbing field and a weak probe field is solved, assuming a separation of collisional and radiative processes, by introducing a classical-field renormalization technique. The solution is formulated entirely in terms of linear-response functions. This method is applied to the problem of the three-level absorber perturbed by a strong field and probed by a weak field. Multiphoton transitions, double resonance, and dynamic Stark effects can be treated as manifestations of this three-level problem.

L. Allen

J H Sandars and S Sleenholm (eds) Oxford: Pergamon Press 1974 Part 1 Three Level Gas Systems and Their Interaction with Radiation pp 106 price £2.95 Part 2 Mode Locking of Lasers pp 107–229 price £2.80 Both parts of this volume are valuable. The first is an extensive account of the behaviour of three level systems in the presence of an intense field resonant with one of the transitions.

Pavel A Apanasevich, A. S. Bankovskii