Blue, surface-emitting, distributed feedback polyfluorene lasers

Heliotis, G.; Xia, R.; Bradley, D.D.C.; Turnbull, G.A.; Samuel, I.D.W.; Andrew, P.; Barnes, W.L.
September 2003
Applied Physics Letters;9/15/2003, Vol. 83 Issue 11, p2118
Academic Journal
We report the fabrication of optically-pumped solid-state distributed feedback lasers utilizing two blue-light-emitting semiconducting polyfluorenes as gain media. The lasers were readily fabricated by solution deposition of thin polymer films on top of gratings etched into fused silica substrates. A compact Nd:YVO[sub 4] microchip laser was used as the pump source for the two polymers studied, and lasing was achieved at 455 and 465 nm. Low threshold energies, >=4 nJ per pulse, were obtained. The emission characteristics of the lasers are described along with the results of additional experiments that investigate in more detail the effect of the grating microstructure on polymer light emission. © 2003 American Institute of Physics.


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