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Creation of Light and/or Surface Plasmons with Heated Metallic Films

DOE Grant Recipients

University of Minnesota

Contact University of Minnesota About This Technology


<span id="Caption"><span id="ctl00_MainContentHolder_zoomimage_defaultCaption">Ultrasmooth  thin metal films with a nanoscale bull&rsquo;s eye pattern of circular  concentric grooves produce a monochromatic beam of collimated light when  heated.  The monochromatic light beam produced by the device is  low-intensity. </span></span>
Ultrasmooth thin metal films with a nanoscale bull’s eye pattern of circular concentric grooves produce a monochromatic beam of collimated light when heated. The monochromatic light beam produced by the device is low-intensity.

<span id="Caption"><span id="ctl00_MainContentHolder_zoomimage_defaultCaption">The  plasmonic device can be made from different metals such as tungsten,  gold and silver or other combinations of materials.  The wavelength of  the emitted light can be tuned by changing the metal and the spacing of  the concentric grooves of the bull&rsquo;s eye pattern. </span></span>
The plasmonic device can be made from different metals such as tungsten, gold and silver or other combinations of materials. The wavelength of the emitted light can be tuned by changing the metal and the spacing of the concentric grooves of the bull’s eye pattern.

<span id="Caption"><span id="ctl00_MainContentHolder_zoomimage_defaultCaption">Ultrasmooth  thin metal films with a nanoscale bull&rsquo;s eye pattern of circular  concentric grooves produce a monochromatic beam of collimated light when  heated. </span></span>
Ultrasmooth thin metal films with a nanoscale bull’s eye pattern of circular concentric grooves produce a monochromatic beam of collimated light when heated.

Technology Marketing Summary

Thin Metal Film Plasmonic Device

Ultrasmooth thin metal films with a nanoscale bull’s eye pattern of circular concentric grooves produce a monochromatic beam of collimated light when heated. The plasmonic device can be made from different metals such as tungsten, gold and silver or other combinations of materials. The wavelength of the emitted light can be tuned by changing the metal and the spacing of the concentric grooves of the bull’s eye pattern. The monochromatic light beam produced by the device is low-intensity.


This unique plasmonic device has applications in

  • Thermophotovoltaics
  • Sensors including temperature and chemical sensing
  • Optical signal processing
  • Analytical instrumentation


Description

Cost Effective Process to Construct Thin Metal Films

A simple and cost effective process for constructing the thin metal films has also been developed. The process produces films which are extremely smooth which improves the efficiency of the plasmonic wave propagation.

Benefits
  • Converts thermal energy into light or vice versa
  • Produces beams of collimated light that are low-intensity
  • Tunable emission from microwave to visible wavelengths
  • Improved emission output – narrow, focused beams
  • Simple fabrication method
Applications and IndustriesLicense is for plasmonic devices with a concentric circular pattern (bull’s eye) that convert thermal energy into light.More Information

Inventor(s)

Dr. David Norris
Professor of Chemical Engineering and Materials Science

The goal of research in the Norris group is to tailor the optical properties of materials by controlling size, shape, and structure. In addition to investigating fundamental principles, each of our projects is pursued with specific applications in mind. Dr. Norris is currently a professor at the Swiss Federal Institute of Technology in Zurich Switzerland where he continues to develop this technology.

Patents and Patent Applications
ID Number
Title and Abstract
Primary Lab
Date
Patent 8,948,562
Patent
8,948,562
Replication of patterned thin-film structures for use in plasmonics and metamaterials
The present invention provides templating methods for replicating patterned metal films from a template substrate such as for use in plasmonic devices and metamaterials. Advantageously, the template substrate is reusable and can provide plural copies of the structure of the template substrate. Because high-quality substrates that are inherently smooth and flat are available, patterned metal films in accordance with the present invention can advantageously provide surfaces that replicate the surface characteristics of the template substrate both in the patterned regions and in the unpatterned regions.
02/03/2015
Issued
Technology Status
Technology IDDevelopment StageAvailabilityPublishedLast Updated
Z09085Development - Metallic films in Tungsten, Silver and Tantalum with the concentric groove pattern have been built. The Tungsten film when heated to 800°C emits a narrow beam near 3.5 micrometers.Available - Licensee will receive rights to practice the intellectual property (patent application) for the purposes of developing and manufacturing a commercial product.03/13/201203/13/2012

Contact University of Minnesota About This Technology

To: University of MinnesotaDale Nugent<danugent@umn.edu>