Performance evolution of color cone lasing emissions in dye-doped cholesteric liquid crystals at different fabrication conditions

doi:10.1364/OE.23.010168

中山醫學大學機構典藏 CSMUIR > 醫學科技學院 > 視光學系暨碩士班 > 期刊論文 > Item 310902500/19266

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题名:	Performance evolution of color cone lasing emissions in dye-doped cholesteric liquid crystals at different fabrication conditions
作者:	CR, Lee JD, Lin TS, Mo CT, Horng HY, Sun SY, Huang
贡献者:	中山醫學大學
日期:	2015-04
上传时间:	2018-06-22T03:11:02Z (UTC)
出版者:	Opt Express
ISSN:	1094-4087
摘要:	This work investigates the performance evolution of color cone lasing emissions (CCLEs) based on dye-doped cholesteric liquid crystal (DDCLC) cells at different fabrication conditions. Experimental results show that the energy threshold (E(th)) and relative slope efficiency (η(s)) of the lasing signal emitted at each cone angle (0°-35°) in the CCLE decreases and increases, respectively, when the waiting time in a homogenously rubbed aligned DDCLC cell is increased from 0 hr to 216 hr (9 days). This result occurs because defect lines gradually shrink with the anchoring of the surface alignment when the waiting time is increased. Hence, the scattering loss decreases, and the dwelling time of the fluorescence photons in the resonator increases, which in turn enhances the CCLE performance. With the aligned cell given the pretreatment of a rapid annealing processing (RAP), the waiting time for obtaining an optimum CCLE can markedly be reduced sixfold. The surface alignment of the DDCLC cell also plays a necessary role in generating the CCLE. This work provides an insight into the temporal evolution of the performance for the CCLE laser and offers a method (RAP) of significantly speeding up the formation of a CCLE laser with optimum performance.
URI:	http://dx.doi.org/10.1364/OE.23.010168 https://ir.csmu.edu.tw:8080/ir/handle/310902500/19266
關聯:	Opt Express. 2015 Apr 20;23(8):10168-80
显示于类别:	[視光學系暨碩士班] 期刊論文

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