Nonlinear optical properties of an organic film formed of dye aggregates with absorption in the telecommunication wavelength range

Tatsuura, Satoshi; Minquan Tian; Furuki, Makoto; Sato, Yasuhiro; Iwasa, Izumi; Mitsu, Hiroyuki
March 2004
Applied Physics Letters;3/1/2004, Vol. 84 Issue 9, p1450
Academic Journal
An organic film formed of newly synthesized dye aggregates with an absorption peak in telecommunication wavelength range exhibited large third-order nonlinear optical susceptibility χ[sup (3)] and fast recovery of bleached absorption. A derivative with a di(benzofuranonyl)methanolate structure forms stable aggregates in a spin-coated film and shows an absorption maximum at 1.24 μm. An imaginary part χ[sub I][sup (3)] of the film assumes a maximum at 1.30 μm, which is -0.83×10[sup -7] esu. The time evolution of differential transmission spectra indicates that the time constant of the recovery of bleached absorption is 80–240 fs for a fast component and 2.2–6.5 ps for a slow one. This organic film has considerable advantages for future planar optical devices. © 2004 American Institute of Physics.


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