Extended squaraine dyes with large two-photon absorption cross-sections.
Extended bis(donor)-substituted squaraine chromophores exhibit very high two-photon cross-sections (as high as 33 000 GM) in the near-IR; these can be attributed to the combination of large transition dipoles with small detuning energies. The modulus of the third-order nonlinear optical susceptibility at 1.3 mum has been found to be 7.0 x 10-11 esu for one of these chromophores.
Chung
Sung-Jae
SJ
School of Chemistry and Biochemistry and Center for Organic Photonics and Electronics, Georgia Institute of Technology, Atlanta, Georgia 30332-0400, USA.
Zheng
Shijun
S
Odani
Toru
T
Beverina
Luca
L
Fu
Jie
J
Padilha
Lazaro A
LA
Biesso
Arianna
A
Hales
Joel M
JM
Zhan
Xiaowei
X
Schmidt
Karin
K
Ye
Aijun
A
Zojer
Egbert
E
Barlow
Stephen
S
Hagan
David J
DJ
Van Stryland
Eric W
EW
Yi
Yuanping
Y
Shuai
Zhigang
Z
Pagani
Giorgio A
GA
Brédas
Jean-Luc
JL
Perry
Joseph W
JW
Marder
Seth R
SR