An effective-medium approach to the optical properties of heterogeneous materials with nonlinear properties

2003 ◽  
Vol 50 (1) ◽  
pp. 113-135
Author(s):  
F. J. Gordillo-Vázquez ◽  
C. Pecharromán
Keyword(s):  
Optical Properties ◽  
Heterogeneous Materials ◽  
Effective Medium ◽  
Nonlinear Properties ◽  
Effective Medium Approach

Optical properties of metal nanoparticle coated silica spheres: a simple effective medium approach

2004 ◽  
Vol 6 (21) ◽  
pp. 5056-5060 ◽  
Author(s):  
Isabel Pastoriza-Santos ◽  
Daniel Gomez ◽  
Jorge Pérez-Juste ◽  
Luis M. Liz-Marzán ◽  
Paul Mulvaney
Keyword(s):  
Optical Properties ◽  
Effective Medium ◽  
Metal Nanoparticle ◽  
Silica Spheres ◽  
Effective Medium Approach

Effective Medium Approach For Calculation of Linear and Nonlinear Properties of Porous Semiconductor Composites.

2005 ◽  
Vol 881 ◽  
Author(s):  
Vladimir Kochergin ◽  
Helmut Föll
Keyword(s):  
Optical Anisotropy ◽  
Effective Medium ◽  
Semiconductor Materials ◽  
Mesoporous Silicon ◽  
Nonlinear Properties ◽  
General Methodology ◽  
Effective Medium Approach ◽  
Linear And Nonlinear ◽  
Porous Inp ◽  
Nanostructured Semiconductor

AbstractThe general methodology of calculating linear and nonlinear properties of nanoporous and nanostructured semiconductor materials and composites is presented. A Maxwell-Garnett approach is generalized for the case of porous semiconductor materials composed of a number of differently oriented pore lattices. Specifically, the cases of electrochemically etched mesoporous silicon on (110)-oriented substrate and electrochemically-etched porous InP and GaAs materials on (100) substrates are considered. The observed optical anisotropy of mesoporous Si is explained. A biaxial anisotropy of the porous InP or GaAs material with crystallographic pores is predicted.

Theoretical Framework of 1,3-Thiazolium-5-Thiolates Mesoionic Compounds: Exploring the Nature of Photophysical Properties and Molecular Nonlinearity

2020 ◽  
Author(s):  
Zeyu Liu ◽  
Shugui Hua ◽  
Tian Lu ◽  
Ziqi Tian
Keyword(s):  
Optical Properties ◽  
Rational Design ◽  
Rayleigh Scattering ◽  
Function Analysis ◽  
Theoretical Calculations ◽  
Photophysical Properties ◽  
Optical Nonlinearity ◽  
Nonlinear Properties ◽  
Photoelectric Performance ◽  
Wave Function Analysis

Inspired by a previous experimental study on the first-order hyperpolarizabilities of 1,3-thiazolium-5-thiolates mesoionic compounds using Hyper-Rayleigh scattering technique, we theoretically investigated the UV-Vis absorption spectra and every order polarizabilities of these mesoionic molecules. Based on the fact that the photophysical and nonlinear properties observed in the experiment can be perfectly replicated, our theoretical calculations explored the essential characteristics of the optical properties of the mesoionic compounds with different electron-donating groups at the level of electronic structures through various wave function analysis methods. The influence of the electron-donating ability of the donor on the optical properties of the molecules and the contribution of the mesoionic ring moiety to their optical nonlinearity are clarified, which have not been reported by any research so far. This work will help people understand the nature of optical properties of mesoionic-based molecules and provide guidance for the rational design of molecules with excellent photoelectric performance in the future.

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