By studying the detailed dynamics of ultrashort pulses at semiconductor–vacuum interfaces, we have shown that the interaction of these pulses with nonstationary semiconductor plasmas can, under appropriate conditions, lead to a variety of interesting phenomena: controlled upshifting of the laser frequency, possible cascading of upshifting, a trapped pulse bouncing back and forth in the sample, and a so-called machine gun of increasingly blueshifted pulses.
© 2001 Optical Society of America
(190.2640) Nonlinear optics : Stimulated scattering, modulation, etc.
(190.4180) Nonlinear optics : Multiphoton processes
(320.7130) Ultrafast optics : Ultrafast processes in condensed matter, including semiconductors
V. I. Berezhiani, S. M. Mahajan, and R. Miklaszewski, "Multiple reflections: cascaded upshifting of laser pulses by semiconductors," J. Opt. Soc. Am. B 18, 617-622 (2001)