[20p-PA3-1~42] 12.3 Functional Materials and Novel Devices

△ [20p-PA3-20] Optically pumped lasing from BP3T single crystals prepared by solution growth process

〇(D)Takumi Matsuo¹, Hitoshi Mizuno¹, Fumio Sasaki², Hisao Yanagi¹ (1.NAIST, 2.ESPRIT AIST)

Keywords:organic semiconductor laser, cooperative light amplification, polariton lasing

Electrically driven gain narrowed emission and optically pumped cooperative light amplification process similar to superfluorescence have been observed from 5,5”-bis(4-biphenylyl)-2,2’:5’2”-terthiophene (BP3T) single crystals. BP3T single crystals have been prepared mainly via physical vapor transport process, but most of them had curved crystal edge, which is not ideal for Fabry–Pérot lasing. We report the sample preparation of BP3T single crystals which has parallel crystal edge, and will report the observation of lasing spectra in both 0-2 and 0-1 light emission line. Furthermore, some BP3T single crystal samples showed unusual band splitting in their lasing spectra. Under this band splitting condition, we will carry on the angle resolved PL spectrum measurement from the standpoint of polariton lasing.