Investigation of the Dispersion of Nonlinear Absorption and Refraction in Organics

9510046范斯特里兰大帝建议应用他在了解无机材料(半导体和电介质)对有机材料的非线性响应方面所获得的知识。特别是，他将专注于特定类别的有机材料，如大环染料，这些材料已被证明具有强烈的非线性。他还将研究这些材料中的共振非线性。例如，金属酞菁和金属-萘酞菁表现出激发态吸收(反饱和吸收)增加的吸收。事实证明，这种非线性对光限幅很有用。此外，他还将进一步开发一种数值模型，用于确定光在厚厚的非线性介质中的传播。该模型允许优化使用非线性吸收和非线性折射来实现诸如光限幅之类的应用。他过去的研究包括双光子吸收(2PA)，以氮气为特征的束缚电子非线性折射，以及半导体和电介质中的自由载流子效应。他最近将这些测量扩展到了分子物种，并观察到了类似的非线性。***

9510046 Van Stryland The PI proposes to apply the knowledge he has gained in understanding the nonlinear response of inorganic materials (both semiconductors and dielectrics) to organic materials. In particular he will concentrate on specific classes of organic materials such as macrocyclic dyes that have been shown to exhibit strong nonlinearities. He will also investigate resonant nonlinearities in these materials. For example, metallophthalocyanines and metallo-naphthalocyanines exhibit increasing absorption from excited state absorption (reverse saturable absorbers). Such nonlinearities are proving useful for optical limiting. In addition, he will further develop a numerical modeling for determining the propagation of light through thick nonlinear media. This modeling allows optimized use of nonlinear absorption and nonlinear refraction for applications such as optical limiting. His past research investigated two-photon absorption (2PA), bound electronic nonlinear refraction characterized by n2, and free-carrier effects in semiconductors and dielectrics. He has recently extended these measurements to molecular species and observed analogous nonlinearities. ***