The optical limiting properties of a thin film (~150 µm) of chemically enhanced bacteriorhodopsin under cw laser illumination is investigated. The effective nonlinearity n2 of the film is measured with the z-scan method. Anomalous absorption at different wavelengths as a function of illumination intensity is observed.
© 1993 Optical Society of America
Q. Wang Song, Chungping Zhang, Richard Gross, and Robert Birge, "Optical limiting by chemically enhanced bacteriorhodopsin films," Opt. Lett. 18, 775-777 (1993)