Showing papers in "Journal of the Optical Society of America in 2003"
Journal Article•
TL;DR: A probabilistic pooling model is described that shows that populations of neurons with contrast responses like those in cat and monkey V1 would most accurately code contrasts in the range actually found in natural scenes.
27 citations
Journal Article•
TL;DR: In this article, the authors investigated nonlinear absorption of Rhodamine B dye in methanol and water near resonance (532 nm) on the higher energy (435 nm) and lower energy (600 nm) sides of the absorption band using an open-aperture Z-scan technique with nanosecond pulses.
Abstract: We have investigated nonlinear absorption of Rhodamine B dye in methanol and water near resonance (532 nm) on the higher-energy (435 nm) and lower-energy (600 nm) sides of the absorption band, using an open-aperture Z-scan technique with nanosecond pulses. We observed reverse saturable absorption (RSA) at 435 nm in both of the solvents, and a transition from saturable absorption (SA) to RSA with an increase in either intensity or concentration at 600 nm in methanol. A transition from RSA to SA with an increase in concentration at 600 nm was observed with water as the solvent. We used theoretical analysis based on rate equations to determine the two-photon and excited-state absorption coefficients from the experimental results.
14 citations