[23a-C105-1~11] 12.3 Functional Materials and Novel Devices

△ [23a-C105-1] Optically Pumped Lasing Derived from the Formation of Vibrationally Dressed Exciton
Polaritons in a Single-Crystal Molecular Cavity

〇Takumi Matsuo¹, Yusuke Ueda², Hitoshi Mizuno³, Fumio Sasaki⁴, Kenichi Yamashita², Hisao Yanagi³ (1.KUT, 2.KIT, 3.NAIST, 4.RIAEP AIST)

Keywords:organic semiconductor, vibrationally dressed exciton polariton, optically pumped lasing

Polariton lasers based on organic semiconducting materials have been paid keen attentions owing to their possibilities to work at room temperature. When 5,5″-bis(biphenylyl)-2,2′:5′,2″-terthiophene (BP3T) was optically pumped using a pulsed laser in our experiment, unusually split lasing spectrum was obtained in a naturally formed crystal cavity. The values of wavenumber were calculated by the mode intervals of the lasing spectrum. The dispersion curves of energy versus wavenumber plots suggested the formation of the coupling among excitons, molecular vibrations and cavity photons, which are called vibrationally dressed exciton polaritons.