Nonlinear optical materials switchable

Coe, B. J., Molecular materials possessing switchable quadratic nonlinear optical properties. Chem. Eur. J. 1999, 5, 2464-2471. 

Irie et al. reported on the absolute reversible photocyclization reactions of achiral diarylethene 52 in chiral crystal leading to 53 in up to 99% ee. The asymmetric photochromic material has potential application in nonlinear optics, for example, in switchable second harmonic generation devices. [32]... 

A current challenge is the development of efficient strategies for the design of switchable nonlinear optical (NLO) materials. The ability to switch the NLO activity of a molecule on and off is of relevance for the development of molecular photonic devices, as those properties can be... 

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