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Keywords:

  • thiophene/phenylene co-oligomer;
  • orthorhombic crystal;
  • light confinement;
  • room temperature lasing;
  • stimulated raman scattering
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Room temperature lasing was stably observed in air from an orthorhombic crystal of 5,5′-bis(4′-methoxybiphenyl-4-yl)-2,2′-bithiophene (BP2T-OMe). A pair of parallel {110} facets of the single crystal acted as effective Fabry-Pérot mirrors. This prominent lasing is based on high group refractive index (3.5) and Q factor (4500) of the orthorhombic crystal resonator indicating a promising potential of BP2T-OMe for organic laser media.