Nonlinear high-resolution subsurface imaging: new application of self-focusing
Askar'yan G. A. , Yurkin A. V.
The possibility of utilizing the self-focusing of radiation for subsurface imaging is proposed. A study of this possibility is reported. It is possible to increase the efficiency (to intensify the backward transport of the acoustic and optical responses) and to increase the imaging resolution by virtue of a contraction of the beam spot.