Page 12 - Photoreactive Organic Thin Films

CONTENTS x j

12 Photoinduced Third-Order Nonlinear Optical Phenomena in
Azo-Dye Polymers
VICTOR M.CHURIKOVAND CHIA-CHEN HSU

12.1 Introduction 366
12.2. Third Harmonic Generation 367
12.2.1 Theoretical Model 367
12.2.2 Experiment 373
12.2.3 Results 375
12.3 Electric Field Induced Second Harmonic Generation 381
12.3.1 Theory 381
12.3.2 Experiment 383
12.3.3 Results and Discussion 384
12.4 Degenerate Four-Wave Mixing 388
12.4.1 Introduction 388
12.4.2 Experiment 389
12.4.3 Experimental Results and Discussion 391
12.5 Prospective and Conclusions 392

•ffl OPTICAL MANIPULATION AND MEMORY

13 Photoinduced Notions in Azobenzene-Based Polymers
ALMERIA NATANSOHN AND PAUL ROCHON

13.1 Introduction 400
13.2 Photoinduced Motions 400
13.2.1 Photoinduced Motions at the Molecular Level 402
13.2.2 Photoinduced Motions at the Domain Level 411
13.2.3 Photoinduced Motions at the Macroscopic Level 417
13.3 Possible Photonic Devices 420
13.3.1 Reversible Optical Storage 420
13.3.2 Holographic Storage 421
13.3.3 Waveguides 421
13.3.4 Couplers 421
13.3.5 Wavelength and Angle Filters 422
13.3.6 Polarization Separators 422
13.3.7 Optoelectronic Switches 422
13.3.8 Liquid Crystal Orientation 423
13.3.9 Optical Switches 423
13.4 Conclusions 423