Third-order nonlinear optical materials

Gray, G. M. Lawson, C. M. Structure-Property Relationships in Transition Metal-organic Third-order Nonlinear Optical Materials. In Optoelectronic Properties of Inorganic Compounds, Roundhill, D. M., Fackler, J. P., Jr., Eds. Plenum New York, 1999 pp 1-27. 

The development of highly active third-order nonlinear optical materials is important for all-optical signal processing. In contrast to second-order nonlinear optical molecular systems, there are few rational strategies for optimizing the third-order nonlinear optical response of molecular materials. Unlike second-order materials, there exist no molecular symmetry restrictions for the observation of a third-order nonlinear optical response. It is the instantaneous... 

The area of molecular nonlinear optics has been rejuvenated by efforts to investigate three-dimensional multipolar systems, functionalized polymers as optoelectronic materials, near infrared optical parametric oscillators and related aspects.71 There have been some advances in chromophore design for second-order nonlinear optical materials 72 these include onedimensional CT molecules, octopolar compounds and organometallics. Some of the polydiacetylenes and poly(/>-phenylenevinylene)s appear to possess the required properties for use as third-order nonlinear optical materials for photonic switching.73... 

In order to successfully substitute the role of the electron by the photon in photonic applications, it is necessary to achieve high processing speeds. For applications of the intensity-dependent refractive index, one could define the following figure of merit that evaluates the optical switching performance of a third-order nonlinear optical material [24] ... 

Plekhanov, A.I., Markov, R.V., Rautian, S.G., Orlova, N.A, Shelkovnikov, V.V., Volkov, V.V (1998). Third-order nonlinearity optical properties of the films of cyanine dye with borate anion Proc. SPIE "Third-Order Nonlinear Optical Materials . Vol. 3473. pp. 20-31. (c)... 

Organic compounds with delocalized jr-electron systems, e,g., jr-conjugated polymers, are considered to be candidates for third-order nonlinear optical materials. Among them, polydiacetylenes (PDAs) are an important class of conjugated polymers that has attracted investigators from many different fields (7,2). PDAs, which can be obtained as single crystals by topochemical solid-state polymerization (5), have been extensively studied since 1976 (4). PDAs show large third-order nonlinear optical susceptibilities (5) and ultrafast optical... 

US6S. Both polygermanes and polystannanes may find applications because of their unique optical, electronic, and chemical properties. Some of these potential uses include photoresist layers (44,59,60), third-order nonlinear optical materials (50), charge transport polymers (61,62), photoconductors, microlitho-graphic materials (63), and photoinitiators (59). 

M. G. Kuzyk, Third Order Nonlinear Optical Materials, 3473 SPIE, Bellingham, Wash., 1998. 

Recently, Diederich and coworkers synthesized a novel D-A system 21 containing a dendralene backbone, which might be a promising candidate for third-order nonlinear optical materials [28]. The D—A chromophores are introduced by the one-pot cascade of successive [2-1-2] Tetracyanoethylene (TCNE)/TTF cycloadditions to the tetrayne 20 (Scheme 8.4). This synthetic protocol might have great potential for a new class of cross-conjugated system with multivalent CT chromophores [29]. 

Morita, K. Suehiro, T. Yokoh, Y Ashitaka, H. The development of organic third-order nonlinear optical materials. J. Photopolym. Sci. Technol. 1993, 6, 229-238. 

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