Journal
JOURNAL OF MODERN OPTICS
Volume 52, Issue 7, Pages 1019-1030Publisher
TAYLOR & FRANCIS LTD
DOI: 10.1080/09500340500067174
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We propose a novel mechanism of energy absorption in dielectric materials with ultrashort infrared laser pulses of intensities below the damage threshold. Analytical theory, generalized to hole-assisted processes in arbitrarily polarized laser fields, is validated using one-dimensional numerical simulations of the time-dependent Schrodinger equation. Large enhancements in the multiphoton transition rates are found both numerically and analytically. The one-dimensional calculations are extended to two dimensions via a forest. re percolation model, in which nanoplasma-like structures have been identified.
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