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American Institute of Physics, The Journal of Chemical Physics, 13(136), p. 134501

DOI: 10.1063/1.3697842

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Amplification of the linear and nonlinear optical response of a chiral molecular crystal

Journal article published in 2012 by Sérgio R. Domingos, Pedro S. Pereira Silva, Wybren Jan Buma, M. Helena Garcia, Nelson C. Lopes, José António Paixão ORCID, Manuela Ramos Silva, Sander Woutersen
This paper was not found in any repository, but could be made available legally by the author.
This paper was not found in any repository, but could be made available legally by the author.

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Abstract

We have observed large second-order nonlinear optical and vibrational circular dichroism (VCD) responses in a charge-transfer-type L-Histidinium salt. Using X-ray Diffraction, VCD spectroscopy, and time-dependent density functional theory to characterize the compound, we employ a two-level model to explain and quantify the strongly enhanced optical signals. We find that both linear and nonlinear optical responses are greatly enhanced by a single low-lying charge-transfer state.