Nano Porous Azobenzene Dendron Films for Laser Eye and Sensor Protection

Award Information
Agency:
Department of Defense
Branch
Army
Amount:
$120,000.00
Award Year:
2005
Program:
SBIR
Phase:
Phase I
Contract:
W911QY-05-C-0025
Award Id:
73746
Agency Tracking Number:
A043-209-1788
Solicitation Year:
n/a
Solicitation Topic Code:
n/a
Solicitation Number:
n/a
Small Business Information
3468 W. Yale St., Fayetteville, AR, 72704
Hubzone Owned:
N
Minority Owned:
N
Woman Owned:
N
Duns:
155516987
Principal Investigator:
Y.Wang
Principle Scientist
(479) 871-0707
awang@oceannanotech.com
Business Contact:
Y.Bu
Business Manager
(479) 236-7147
alicebu@oceannanotech.com
Research Institute:
n/a
Abstract
We have developed an innovative lensless optical power limiting system for green region exploiting photoanisotropy of azobenzene films for low power continuous wave and high power nanosecond pulsed lasers (also with picosecond in solutions). It is a promising technique for next generation laser eye and sensor protection. For a practical device application with films we have to optimize the photoanisotropy to reduce the exciting beam power requirement, improve the response time for ultrashort pulse application and explore avenues for broadband response. To address these issues, this SBIR team proposes films of NanoPAD and MesoPAD systems. The NanoPAD system is designed to use nanosize pores to facilitate ease of photoisomerization and orientation of the azobenzene molecules as in a solution. The interaction between the azobenzene and the host polymer is minimized by reducing their contact area. Further decrease in the interaction will be achieved by reducing polymer polarity. The MesoPAD system is designed with free space around azobenzene molecules to make the environment solution-like for fast response. Finally, several azobenzene molecules will be incorporated into both systems for broadband applications. Protection at both low and high power over the entire visible region will be achieved demonstrating Technology Readiness Level 3.

* information listed above is at the time of submission.

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