**Optical and Resonant Non-Linear Optical Properties of J-Aggregates of Pseudoisocyanine Derivatives in Thin Solid Films**

Vladimir V. Shelkovnikov1 and Alexander I. Plekhanov2 *1Novosibirsk Institute of Organic Chemistry SB RAS, Novosibirsk, 2Institute of Automation and Electrometry SB RAS, Novosibirsk, Russia* 
