Nonlinear Spectroscopy in Chiral Organic Systems
Abstract
This project aims to investigate nonlinear optical properties in chiral conjugated molecular system, specifically chiral polymers, which are of great interest in photonics from fundamental and applied points of view, i.e., such systems allow exploiting distinct effects of light-matter interactions, with prospects in new technologies. For example, the inherent three-dimensional character of the chirality and the high hyperpolarizabilities of conjugated systems provide versatile chemical structures for fabrication of light-emitting diodes, ?eld effect transistors, photodiodes, photovoltaic cells, ?uorescent sensors and so on. Specifically, such investigation will be carried out using wavelength tunable Z-scan experiments (to determine refractive and absorptive nonlinearities), using the excitation light in different polarization (liner, left-circular and right-circular). Supplementary experiments, such as Hyper Rayleigh scattering (to study first hyperpolarizabilities) and pump-probe (to determine the time response of the observed optical properties), will also be performed. The results will be analyzed with the aid of quantum chemical calculations, provided by response function formalism, in order to correlate the 2PA response with the molecular structure.
Document Details
- Document Type
- DoD Grant Award
- Publication Date
- Oct 16, 2018
- Source ID
- W911NF1710123
Entities
People
- Cleber R Mendonca
Organizations
- Army Contracting Command
- São Carlos Institute of Physics at the University of São Paulo
- United States Army