Harvard College

Validere Technologies Inc.

Ian Burgess

Joanna Aizenberg

Marko Loncar

Benjamin Hatton

Nicolas Vogel

Lidiya Mishchenko

David A Weitz

Mathias Kolle

Tanya Shirman

Elijah Shirman

Stefanie Utech

Katherine Reece Phillips

Theresa M Kay

Natalie Koay

Grant England

Calvin Russell

Katherine Philips

The present application provides a method and system for the characterization of properties of liquids, particularly petroleum and petroleum liquids. The method and system can be used to take measurements of the liquid directly in a storage container, without exposing the contents of the container to the external environment.

Liquid testing system and method

A structurally colored pigment is described that contains a plurality of photonic crystal particles dispersed in a medium, where each photonic crystal particles contains a plurality of spectrally selective absorbing components dispersed within the photonic crystal particle. In certain embodiments, each photonic crystal particle has a predetermined minimum number of repeat units of the photonic crystal structure. The structurally colored material provides improved reflectance, long-term stability, and control of the desired optical effects. The fabrication techniques described herein also provide high throughput and high yield allowing use in wide ranging applications from cosmetics, paints, signs, sensors, to packaging material.

Structurally colored materials with spectrally selective absorbing components and methods for making the same

A method of making a multi-layered film includes depositing thin film layers onto a first side of a double-sided transparent substrate. The thin film layers are transparent, and two adjacent layers of said plurality of thin film layers have different refractive indices. One or more absorbers are deposited at an interface formed between two of the thin film layers that are adjacent to one another, or formed by the first side of the substrate and one of the thin film layers. The absorbers absorb selected wavelengths of incident light and reflect part of the incident light after inducing a phase shift. The location of the interface is selected to provide desired wavelengths of absorbed and reflected light. The multi-layered film has a first appearance when viewed from the first side of the substrate and a second appearance when viewed from the second side of the substrate.

Modifying optical properties of thin film structures using an absorbing element

A three-dimensional porous photonic structure, whose internal pore surfaces can be provided with desired surface properties in a spatially selective manner with arbitrary patterns, and methods for making the same are described. When exposed to a fluid (e.g., via immersion or wicking), the fluid can selectively penetrate the regions of the structure with compatible surface properties. Broad applications, for example in security, encryption and document authentication, as well as in areas such as simple microfluidics and diagnostics, are anticipated.

Manipulation of fluids in three-dimensional porous photonic structures with patterned surface properties

Growing community of inventors

Toronto, Canada

Ian Burgess