Lasing action in dual-doped organic microcavity with cascade energy transfer
In this paper,we studied lasing action in dual-doped organic microcavity with cascade Forster energy transfer between polymer and two fluorescent dyes in surface emitting microcavities,which formed by sandwiching a poly(N-vinylcarzole) (PVK) film doped with 8-trishydroxyquinoline (Alq3) and 4-(dicyanomethylene)-2-tert-butyl-6 (1,1,7,7-tet ramethyljulolidyl-9-enyl)-4H-pyran (DCJTB) between a distributed Bragg reflector (DBR) and a silver film mirror.The sample was optically pumped by a frequency-tripled Nd:YAG laser delivering 5.55ns pulses at 355nm with a 1 0Hz repetition rate.By optimizing the concentrations of Alq3 and DCJTB in PVK,a low lasing threshold of about 9.5μJ per pulse attributed to efficient cascade Forster energy transfer form PVK and Alq3 to DCJTB was obtained.The full width at half maximum (FWHM) of the emission was about 2nm with the peak wavelength at 628nm.Our results demonstrate that the PVK:Alq3:DCJTB could be a promising candidate as gain medium for red organic diode lasers.
Forster energy transfer cascade energy transfer organic diode lasers microcavity
ZHAO Xuanke ZHAO Qingwu SHEN Xiaofang
Dept.of Physics,Xian Research Inst.of Hi-Tech,Hongqing Town,Xian 710025,P.R.China
国际会议
西安
英文
1125-1128
2012-06-12（万方平台首次上网日期，不代表论文的发表时间）