Nano Porous Azobenzene Dendron Films for Laser Eye and Sensor Protection

Award Information
Agency: Department of Defense
Branch: Army
Contract: W911QY-05-C-0025
Agency Tracking Number: A043-209-1788
Amount: $120,000.00
Phase: Phase I
Program: SBIR
Awards Year: 2005
Solicitation Year: 2004
Solicitation Topic Code: A04-209
Solicitation Number: 2004.3
Small Business Information
3468 W. Yale St., Fayetteville, AR, 72704
DUNS: 155516987
HUBZone Owned: N
Woman Owned: Y
Socially and Economically Disadvantaged: N
Principal Investigator
 Y. Andrew Wang
 Principle Scientist
 (479) 871-0707
Business Contact
 Y. Bu
Title: Business Manager
Phone: (479) 236-7147
Research Institution
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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