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Microdisk and Microring Lasers of Thiophene–Phenylene Co‐Oligomers Embedded in Si/SiO 2 Substrates
Author(s) -
Sasaki F.,
Kobayashi S.,
Haraichi S.,
Fujiwara S.,
Bando K.,
Masumoto Y.,
Hotta S.
Publication year - 2007
Publication title -
advanced materials
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 10.707
H-Index - 527
eISSN - 1521-4095
pISSN - 0935-9648
DOI - 10.1002/adma.200701008
Subject(s) - lasing threshold , materials science , whispering gallery wave , phenylene , optoelectronics , thiophene , laser , q factor , optics , resonator , polymer , composite material , wavelength , organic chemistry , chemistry , physics
Lasing emission with whispering gallery modes is achieved for microcavities of thiophene–phenylene co‐oligomers embedded in Si/SiO 2 substrates. The microcavities show a lasing threshold that is 20–50 % of the values observed for bulk films. Quality factors of a few thousand are achieved for these structures. The grain boundaries and cracks in the film at the circumferential interface are thought to limit the quality factor and lasing threshold of these microcavities.