Nonlinear optical study in a set of dibenzylideneacetone derivatives with potential for optical frequency conversion
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2020
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The search for advanced optical materials, in particular, materials with nonlinear optical
responses, has, in the last years, experienced substantial growth due to their vast applications in the
photonics field. One of those applications is ultra-fast optical frequency conversion, in the optics
communications field. Organic compounds have emerged as promising candidates for raw materials
to develop nonlinear optical devices, such as optical converters, due to their intrinsic ultra-fast
electronic responses. Also, the easy tailoring of organic molecular structures makes organic materials
much more appealing than the inorganic ones. In this work, we have performed a linear and nonlinear
optical characterization of a set of dibenzylideneacetone derivatives. The nonlinear optical responses
investigated correspond to second- and third-order nonlinear processes, namely, first electronic
molecular hyperpolarizability and two-photon absorption cross-section, respectively. The value
of the first electronic molecular hyperpolarizability, up to 52 cm4
·statvolt−1
, could be considered a
robust value when compared to the short-sized π-electron backbone length of the studied compounds.
Such results suggest that these compounds exhibit the potential to be used as optical frequency
converters. Quantum chemical calculations were used to predict the theoretical value of the first
molecular hyperpolarizability, as well as to simulate the one- and two-photon absorption spectra for
all compounds.
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Optical communications, Quantum chemical calculations, Frequency converters, Two-photon absorption, Organic compounds, Second harmonic generation, Dibenzylideneacetone derivatives
Citação
SANTOS, Francisco A.et al. Nonlinear optical study in a set of dibenzylideneacetone derivatives with potential for optical frequency conversion. Photonics, Basel, v. 7, n. 1, e 8, 2020. DOI: 10.3390/photonics7010008. Disponível em: https://www.mdpi.com/2304-6732/7/1/8. Acesso em: 3 maio 2023.