Upconverting Films

Award Information
Agency: Department of Defense
Branch: Defense Advanced Research Projects Agency
Contract: W31P4Q-10-C-0007
Agency Tracking Number: 07SB2-0488
Amount: $749,874.00
Phase: Phase II
Program: SBIR
Awards Year: 2010
Solicitation Year: 2007
Solicitation Topic Code: SB072-034
Solicitation Number: 2007.2
Small Business Information
Mesolight, LLC
UAMS BioVentures Building, 4301 West Markham Street, Little Rock, AR, 72205
DUNS: 155828861
HUBZone Owned: N
Woman Owned: N
Socially and Economically Disadvantaged: N
Principal Investigator
 Yunjun Wang
 Senior Scientist
 (479) 799-3368
 yjwang@mesolight.com
Business Contact
 Yunjun Wang
Title: CEO
Phone: (479) 799-3368
Email: yjwang@mesolight.com
Research Institution
N/A
Abstract
The rapid proliferation of infrared lasers in armed services generates an immediate need for new infrared detectors with high sensitivity, selectivity, resolution, and low production cost. Currently used semiconductor-based infrared detectors have low quantum efficiency, high dark counts, and need cryogenic cooling. An alternative approach is to upconvert infrared lights into visible lights that can be detected by silicon Avalanche photodiodes (APDs) with much lower noise and higher efficiency. Current phosphor screen used in infrared detection device usually consists of upconverting phosphor with a mean size between 3 to 10 microns, and the light generated scatters over and results in loss of light output, transparency, and spatial resolution. In phase I, we developed upconverting nanophosphors with high upconversion efficiency and pure color emissions, and fabricated transparent upconverting films by incorporating these nanocrystals into polymers. This Phase II program will continue to develop upconverting nanophosphors and nanocomposite films with desired features of high infrared sensitivity, selectivity, transparency, and appropriate refractive-index (to effectively extract the generated emissions). Using the nanocomposite upconverting films, prototypes of highly sensitive, compact, lightweight, and low-cost infrared detector will be fabricated

* information listed above is at the time of submission.

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