Journal
PHYSICA STATUS SOLIDI A-APPLICATIONS AND MATERIALS SCIENCE
Volume 209, Issue 12, Pages 2437-2440Publisher
WILEY-V C H VERLAG GMBH
DOI: 10.1002/pssa.201200212
Keywords
room temperature lasing; stimulated Raman scattering; thiophene/phenylene co-oligomer; time-delayed emission; vapor-grown crystal
Funding
- Ministry of Education, Culture, Sports, Science, and Technology of Japan [23108712]
- Green Photonics project of Nara Institute of Science and Technology
- Grants-in-Aid for Scientific Research [22350082] Funding Source: KAKEN
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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-Perot 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. (C) 2012 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim
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