Stephen Joseph Gray

US Patent:

20130286467, Oct 31, 2013

Filed:

Apr 26, 2012

Appl. No.:

13/456485

Inventors:

Vitalli Vlasko-Vlasov - Downers Grove IL, US
Aiqing Chen - Fremont CA, US
Ulrich Welp - Lisle IL, US
Stephen K. Gray - Wheaton IL, US

International Classification:

H01S 3/30

US Classification:

359334

Abstract:

A method, system and article of manufacture for amplification of light for surface enhanced Raman spectroscopy. The method and system include a source of input light, a grating with grooves therein, a nanoparticle array disposed in the grooves with the nanoparticles and grating having a variety of selectable parameters. The combination of the nanoparticles and selected characteristics, including generating hot spots, and the features of the grating enable enhanced amplification of the input light signal to provide an output Raman signal of greatly increased intensity for Raman spectroscopy.

US Patent:

20220326499, Oct 13, 2022

Filed:

Apr 9, 2021

Appl. No.:

17/226734

Inventors:

- Chicago IL, US
Stephen K. Gray - Wheaton IL, US
Xiewen Wen - Willowbrook IL, US
Sushovit Adhikari - Westmont IL, US
Cristian Leonardo Cortes - Chicago IL, US
David J. Gosztola - Naperville IL, US

Assignee:

UCHICAGO ARGONNE, LLC - Chicago IL

International Classification:

G02B 21/18
G06T 5/50
G02F 1/37

Abstract:

A system and methods for ghost imaging second harmonic generation microscopy. Imaging data is collected in parallel, providing faster imagine reconstruction and enabling reconstruction in scattering environments. Ghost imaging, split light beam interacting with a target and a second light beam unimpeded and not required to pass through the same background. A second harmonic generation image is reconstructed from the detected photons.

US Patent:

20190288636, Sep 19, 2019

Filed:

Mar 16, 2018

Appl. No.:

15/923909

Inventors:

- Chicago IL, US
Nari Jeon - Skokie IL, US
Stephen K. Gray - Wheaton IL, US

Assignee:

UCHICAGO ARGONNE, LLC - Chicago IL

International Classification:

H02S 10/30
H01L 31/054
G06F 17/50

Abstract:

Tailoring the emission spectra of a solar thermophotovoltaic emitter away from that of a blackbody, thereby minimizing transmission and thermalization loss in the energy receiver, is a viable approach to circumventing the Shockley-Queisser limit to single junction solar energy conversion. Embodiments allow for radically tuned selective thermal emission that leverages the interplay between two resonant phenomena in a simple planar structure—absorption in weakly-absorbing thin films and reflection in multi-layer dielectric stacks. A virtual screening approach is employed based on Pareto optimality to identify a small number of promising structures for a selective thermal emitter from a search space of millions, several of which approach the ideal values of a step-function selective thermal emitter