Strong two-photon absorption at telecommunications wavelengths in nickel bis(dithiolene) complexes.
The two-photon absorption spectrum of a nickel bis(dithiolene) complex with extended conjugation and pi-donor substitution is measured by using Z-scan and pump-probe techniques with femtosecond pulses over the spectral range from 1.20 to 1.58 microm, which includes much of the telecommunications range. The peak two-photon cross section of over 5000 GM (1 GM = 10(-50) cm4 s photon(-1) molecule(-1)) occurs at approximately 1.24 microm, with significant two-photon absorption (>440 GM) throughout the spectral range examined.
Cho
Jian-Yang
JY
School of Chemistry and Biochemistry, Georgia Institute of Technology, Atlanta 30306-0400, USA.
Barlow
Stephen
S
Marder
Seth R
SR
Fu
Jie
J
Padilha
Lazaro A
LA
Van Stryland
Eric W
EW
Hagan
David J
DJ
Bishop
Maximilienne
M