Open AccessSupercontinuum assisted trapped electron accumulation in titanium oxide gel by femtosecond laser pulses
Author(s) -
А. И. Кузнецов,
Andreï Kanaev,
N. Bityurin
Publication year - 2007
Publication title -
optics express
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.394
H-Index - 271
ISSN - 1094-4087
DOI - 10.1364/oe.15.005782
Subject(s) - supercontinuum , femtosecond , optics , materials science , sapphire , filamentation , laser , electron , photon , optoelectronics , ti:sapphire laser , physics , wavelength , photonic crystal fiber , quantum mechanics
Long-lived trapped electrons are generated in titanium oxide gels in a convergent part of a loosely focused beam from a millijoule, femtosecond Ti:Sapphire laser. The appearance of trapped electrons is accompanied by the generation of the white supercontinuum. Considering the relevant physical mechanisms of trapped electron accumulation, we show that two-photon interband transitions with participation of photons at the fundamental frequency and from the blue part of the supercontinuum explain the experimental findings.