Journal
OPTICS EXPRESS
Volume 23, Issue 11, Pages A465-A470Publisher
OPTICAL SOC AMER
DOI: 10.1364/OE.23.00A465
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Funding
- National Natural Science Foundation of China [61376023, 61136003]
- National Key Basic Research Program of China (973 Program) [2015CB932203]
- Program for Changjiang Scholars and Innovative Research Teams in Universities of Jiangsu Province [IRT1148]
- Priority Academic Program Development Fund of Jiangsu Higher Education Institutions (PAPD)
- Natural Science Foundation of Nanjing University of Posts and Telecommunications (NUPTSF) [NY212013]
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A series of monodisperse starburst molecules as optical gain media have been investigated in detail. The starburst molecules were composed of a pyrene core with four short oligofluorene arms capped by cyanophenyl moieties. The compounds exhibited low amplified spontaneous emission (ASE) thresholds of 30 nJ pulse(-1) and high maximum net gain coefficient of 55 cm(-1) under optically pump. Our study demonstrates that the introducing of electron-withdrawing cyanophenyl end-capper onto pyrene centered starburst molecules does not disadvantage their optical gain properties while leading to reduced LUMO level, therefore, improved electron affinity. This study suggested a promising approach for organic gain material synthesis to address the challenge of electrically pumped organic laser. (C)2015 Optical Society of America
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