期刊
PHOTONICS
卷 7, 期 1, 页码 -出版社
MDPI
DOI: 10.3390/photonics7010008
关键词
optical communications; frequency converters; organic compounds; dibenzylideneacetone derivatives; second harmonic generation; two-photon absorption; quantum chemical calculations
类别
资金
- CAPES
- CNPq/MCT
- Nanofoton Network
- INCT-FOTONICA
- FAPESP [2016/20886-1, 2018/11283-7]
- Army Research Laboratory [W911NF-17-1-0123]
- Air Force Office of Scientific Research [FA9550-12-1-0028]
- Coordenacao de Aperfeicoamento de Pessoal de Nivel Superior-Brasil (CAPES) [001]
- FAPITEC
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 cm(4)center dot statvolt(-1), could be considered a robust value when compared to the short-sized pi-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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