Color changing and lasing stretchable cholesteric films.
Polymer materials able to change reflective properties due to mechanical deformation fundamentally challenge the theory of soft materials and are important for a number of emerging applications. The most promising of those are chiral lasers. In this communication, we report novel cholesteric materials that display large color change from far red to blue and a shift of the position of the selective reflection band under uniaxial strain from near infrared to ultraviolet. Optical pumping of these materials which are doped with laser dyes, leads to lasing at the wavelengths controlled by strain within the emission interval of laser dyes of 80 nm.
Shibaev
Peter V
PV
Department of Physics, Fordham University, 441 East Fordham Rd., Bronx, 10458, New York, USA. shibpv@yahoo.com
Rivera
Pierre
P
Teter
Dashiell
D
Marsico
Salvatore
S
Sanzari
Martin
M
Ramakrishnan
Veena
V
Hanelt
Eckhard
E
D002784:Cholesterol / Q000737:chemistry* / Q000528:radiation effects*; D003116:Color; D004396:Coloring Agents / Q000737:chemistry* / Q000528:radiation effects*; D004548:Elasticity; D004867:Equipment Design; D019544:Equipment Failure Analysis; D007834:Lasers; D008567:Membranes, Artificial; D013314:Stress, Mechanical
D004396:Coloring Agents; D008567:Membranes, Artificial; D002784:Cholesterol