TY - JOUR
T1 - Low-threshold blue emission from first-order organic DFB laser using 2,7-bis[4-(N-carbazole)phenylvinyl]- 9,9′-spirobifluorene as active gain medium
AU - Hirade, Masaya
AU - Nakanotani, Hajime
AU - Hattori, Reiji
AU - Ikeda, Akihiro
AU - Yahiro, Masayuki
AU - Adachi, Chihaya
N1 - Copyright:
Copyright 2011 Elsevier B.V., All rights reserved.
PY - 2009/1/1
Y1 - 2009/1/1
N2 - We demonstrate optically excited lasing by an organic semiconducting thin-film based on 2,7-bis[4-(N-carbazole)phenylvinyl]-9,9′- spirobifluorene (spiro-SBCz) as an active gain medium with a first-order distributed feedback (DFB) reflector. We prepared DFB reflectors with periods from 132.5 to 145.00nm and grooves from 70 to 140nm depth by using electron-beam-lithography and plasma-etching techniques. The laser having a reflector with a 145.0nm period had a lasing threshold of 0.72±0.07 μJ=cm2, 83% lower than its threshold of amplified spontaneous emission (4.1±0.4 μJ=cm2).
AB - We demonstrate optically excited lasing by an organic semiconducting thin-film based on 2,7-bis[4-(N-carbazole)phenylvinyl]-9,9′- spirobifluorene (spiro-SBCz) as an active gain medium with a first-order distributed feedback (DFB) reflector. We prepared DFB reflectors with periods from 132.5 to 145.00nm and grooves from 70 to 140nm depth by using electron-beam-lithography and plasma-etching techniques. The laser having a reflector with a 145.0nm period had a lasing threshold of 0.72±0.07 μJ=cm2, 83% lower than its threshold of amplified spontaneous emission (4.1±0.4 μJ=cm2).
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U2 - 10.1080/15421400902938928
DO - 10.1080/15421400902938928
M3 - Article
AN - SCOPUS:79953131293
SN - 1542-1406
VL - 504
SP - 1
EP - 8
JO - Molecular Crystals and Liquid Crystals
JF - Molecular Crystals and Liquid Crystals
IS - 1
ER -