Laser Oscillation in Monolithic Molecular Single Crystals (pages 2073–2077)
M. Ichikawa, R. Hibino, M. Inoue, T. Haritani, S. Hotta, K. Araki, T. Koyama and Y. Taniguchi
Article first published online: 26 JUL 2005 | DOI: 10.1002/adma.200500734
Evidence for oscillation in monolithic molecular single crystals of a thiophene/phenylene co-oligomer is reported. The laser oscillations (see Figure) are characterized by naturally formed crystal facet cavities with molecular-scale flatness. The multimode laser oscillation in a Fabry–Pérot resonator is characterized by sharply resolved spectroscopic lines with their full width at half maximum down to only 38 pm. The laser oscillation is characterized by the presence of a well-defined threshold.