Nonlinear properties and kinetics of some donor-acceptor optical-limiting molecules

Dmitri A. Oulianov; Ivan V. Tomov; Alexander S. Dvornikov; Peter M. Rentzepis

doi:10.1117/12.363868

4 October 1999 Nonlinear properties and kinetics of some donor-acceptor optical-limiting molecules

Dmitri A. Oulianov, Ivan V. Tomov, Alexander S. Dvornikov, Peter M. Rentzepis

Proceedings Volume 3798, Power-Limiting Materials and Devices; (1999) https://doi.org/10.1117/12.363868
Event: SPIE's International Symposium on Optical Science, Engineering, and Instrumentation, 1999, Denver, CO, United States

Abstract

The nonlinear optical properties of four novel azulene-type donor-acceptor compounds have been measured by means of the 2D Z-scan technique. These compounds exhibit considerable nonlinear refraction and one shows strong nonlinear saturated absorption at 527 nm. The transient spectra and kinetics, after excitation of the charge-transfer absorption band, have been studied by means of a picosecond transient absorption spectroscopy, allowing us to measure absorbance changes as small as (Delta) A equals 0.005 and time resolution of 1.5 ps. Several compounds exhibited quite strong reversed saturable absorption in a wide region of the visible spectrum. The reversed saturable absorption induced an increase in the effective absorption of the material at high power, which suggests that, it may be useful as an optical limiting medium.

Citation Download Citation

Dmitri A. Oulianov, Ivan V. Tomov, Alexander S. Dvornikov, and Peter M. Rentzepis "Nonlinear properties and kinetics of some donor-acceptor optical-limiting molecules", Proc. SPIE 3798, Power-Limiting Materials and Devices, (4 October 1999); https://doi.org/10.1117/12.363868

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