Molecular hypeipolarizability

Ashwell, et al., have shown that small molecules with large molecular hypeipolarizabilities can be used to build up relatively thick NLO films which have large second harmonic coefficients ( ). Penner, et al, demonstrated that 0.5-micron thick NLO films of high optical quality could be fabricated by LBK heterolayer deposition of side chain polymers (9). Recentiy, Lindsay, et al., reported the use of two mainchain chromophoric polymers to fabricate LBK heterolayer NLO films (10). 

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