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29 November 2000 Nonlinear optical properties of the salts of "diffuse" anions
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A new class of materials, which demonstrates a potentially high third-order nonlinear optical (NLO) response based on highly polarizable anions, is discussed. Two examples of such ions included in this article are trithiocarbonate (CS32-) and aci-nitro-dithioacetate (NO2CHCS22-. The NLO response of any real materials containing these ions will be highly dependent on the nature of the cation present. It is expected that smaller and more localizing cations will have a smaller NLO response. We have performed ab initio finite-field computations of several anions along with some salts of the aci-nitro-dithioacetate anion to illustrate this effect.
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A. Todd Yeates, Douglas S. Dudis, and John S. Wilkes "Nonlinear optical properties of the salts of "diffuse" anions", Proc. SPIE 4106, Linear, Nonlinear, and Power-Limiting Organics, (29 November 2000);

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