Optically pumped lasing from vapor-grown crystals of methoxy-substituted thiophene/phenylene co-oligomer

Authors

  • Hitoshi Mizuno,

    Corresponding author
    1. Graduate School of Materials Science, Nara Institute of Science and Technology, 8916-5 Takayama, Ikoma, Nara 630-0192, Japan
    • Phone/Fax: +81-743-72-6011
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  • Hisao Yanagi,

    1. Electronics and Photonics Research Institute, National Institute of Advanced Industrial Science and Technology, 1-1-1 Umezono, Tsukuba, Ibaraki 305-8568, Japan
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  • Fumio Sasaki,

    1. Electronics and Photonics Research Institute, National Institute of Advanced Industrial Science and Technology, 1-1-1 Umezono, Tsukuba, Ibaraki 305-8568, Japan
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  • Shu Hotta

    1. Department of Macromolecular Science and Engineering, Graduate School of Science and Technology, Kyoto Institute of Technology, Matsugasaki, Sakyo-ku, Kyoto 606-8585, Japan
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Abstract

We report on optically pumped lasing from a vapor-grown crystal of thiophene/phenylene co-oligomer, 2,5-bis(4′-methoxybiphenyl-4-yl)thiophene (BP1T-OMe). By using a pair of parallel facets of a thin sword-like crystal as a Fabry–Pérot resonator, laser oscillations were obtained in the 0-2 emission wavelength at room temperature. Time decay profiles of the lasing band revealed a pulse-shaped emission with delay time of 50 ps. Excitation wavelength dependence of the PL spectra exhibited Raman scattering peaks in particular stimulated in the 0-2 emission band under off-resonant excitation. These light amplification properties were discussed in term of the crystal dimension and H-aggregate structure in the vapor-grown BP1T-OMe crystal.

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