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Title: Methods and apparatus for transparent display using up-converting nanoparticles

Disclosed herein are transparent color displays with nanoparticles made with nonlinear materials and/or designed to exhibit optical resonances. These nanoparticles are embedded in or hosted on a transparent substrate, such as a flexible piece of clear plastic or acrylic. Illuminating the nanoparticles with invisible light (e.g., infrared or ultraviolet light) causes them to emit visible light. For example, a rare-earth doped nanoparticle may emit visible light when illuminated simultaneoulsy with a first infrared beam at a first wavelength .lamda..sub.1 and a second infrared beam at a second wavelength .lamda..sub.2. And a frequency-doubling nanoparticle may emit visible light when illuminated with a single infrared beam at the nanoparticle's resonant frequency. Selectively addressing these nanoparticles with appropiately selected pump beams yields visible light emitted from the nanoparticles hosted by the transparent substrate in a desired pattern.
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Issue Date:
OSTI Identifier:
Massachusetts Institute of Technology (Cambridge, MA CHO
Patent Number(s):
Application Number:
Contract Number:
SC0001299; FG02-09ER46577
Resource Relation:
Patent File Date: 2013 Dec 30
Research Org:
Massachusetts Institute of Technology, Cambridge, MA (United States)
Sponsoring Org:
Country of Publication:
United States

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