Microcavity Lasing at 650 nm from Alq∶ DCJTI Film Under Optical Pumping

Organic microcavity structures were designed and fabricated with distributed Bragg reflector as the mirror and Alq∶ DCJTI host-guest doping system as the gain medium. The standing wave field within microcavity was simulated by using the transfer matrix method,and a suitable microcavity structure was determined. The lasing properties of the microcavity laser were studied by a UV pulse laser. The output wavelength of the microcavity laser is 650 nm. An obvious lasing behavior was observed with a threshold intensity of 110 W·cm- 2. FWHM was narrowed from 4. 7 to 3. 2 nm before and after the threshold.