Details

Project TitleRefractive Index Tuning of Electro-Optic Self-Assembled Superlattices
Track Code2001-001
Short Description

A 'wet-chemical' process affording molecule-based electro-optic (EO) material refractive index tuning in self-assembled superlattice (SAS) organic structures.

#photonics #nonlinearoptics

Abstract

Molecule-based electro-optic (EO) materials offer the potential for greatly simplified telecommunications and increased bandwidth. Siloxane-based layered self-assembly via chemisorption can yield robust, structurally precise, acentric chromophore self-assembled superlattices (SASs). This approach offers higher EO responses and lower dielectric constants than conventional inorganics and SAS modular construction enables the incorporation of tuned EO modulator active region refractive indices beyond conventional pi-electron EO materials.

This invention provides a 'wet-chemical' process affording molecule-based electro-optic (EO) material refractive index tuning in self-assembled superlattice (SAS) organic structures. It involves an iterative process including 1) chemisorption of a large molecular hyperpolarizability chromophore, 2) covalent capping protection, 3) deposition of Ga or In oxide layers and 4) covalent capping protection to afford stable acentric microstructures. The process yields uniform multilayer SAS thin films that strongly adhere to glass, silicon or indium tin oxide-coated substrates. Importantly, the process retains essential microstructural acentricity, without electric field poling.

 
TagsPHOTONICS: nonlinear optics
 
Posted DateApr 21, 2011 1:58 PM

Inventor(s)

Tobin Marks*

Robert Chang
Seng-Tiong Ho
Milko Vanderboom

Applications

• Production of robust acentric microstructures without electric field poling

• Production of SAS structures that can be integrated with other device components

Advantages

• Simple, self-assembly process
• Amenable to automated production

• Highly modular, flexible and straightforward

IP Status

Issued US Patent No. 7,651,777 and 7,976,954

Contact Information

Zach Brown, PhD
Invention Associate
(p) 847-491-4629 
(e) Zachary.Brown@northwestern.edu