Ultrafast, Broad-Band, Passive Laser Shields Based on Novel Semiconductor/Conducting Polymer Interface Technology - SBIR 89.I (A89-083). Phase 1
Abstract
The present work set out to address the critical need for a passive, dynamic (switchable), ultrafast (sub-ns), broad-band (across the Vis.-NIR), durable, yet transmissive 7511 scotopic transmission in unswitched state) laser shield for protection of personnel eyes against exposure to hazardous laser radiation in combat situations with a novel technology combining inorganic semiconductor (SC) electrodes with novel conducting polymers (CPs) in a single, solid-state interface. The viability of the SC/CP interface switching was eminently demonstrated for a large number of SC-CP combinations, with switching risetimes under pulsed laser radiation at the MPE level in the sub-ns regime for all systems studied, and falltimes in the tens to hundreds of ns. A number of novel, processible (soluble) conducting polymers were synthesized for the first time, and a number of these displayed very broad-band and highly reversible switching behavior. Preliminary CW laser studies showed that a number of interface systems switched in this mode as well. Intrinsic laser-induced polymer switching and nonlinear optical effects in these polymers were also looked at. It was seen that the novel polymers synthesized could be applied commercially as processible conductive coatings for a variety of applications, besides the present application to laser shielding.
Document Details
- Document Type
- Technical Report
- Publication Date
- Feb 14, 1990
- Accession Number
- ADA259984
Entities
People
- P. C. Sekhar