Laser emission at 0.8 μm from photopumped luminescent polymer microresonators

摘要

We present the results of a study on laser emission from luminescent polymer microresonators containing a near-infrared emitting dye, 2-(6-(4-dimethylaminophenyl)-2,4-neopentylene-1,3,5-hexatrienyl)-3-methyl-benzothiazolium perchlorat. Poly(1-vinyl-2-pyrrolidone) microrings doped with the dye are fabricated around a 200-μm-diameter silica optical fiber by self-assembly and are shown to lase at around 835 nm under nanosecond photopumping at 532 nm. The threshold for lasing is found to be 311 ±87 μJ/cm~2 (62.2±17.3 kW/cm~2). The lower limit of the cavity quality factor is estimated to be 1.8 X 10~3.