Tuning whispering gallery mode lasing from self-assembled polymer droplets.

Tuning whispering gallery mode lasing from self-assembled polymer droplets.
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DOI:
10.1038/srep01362
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发表时间:
2013
期刊:
影响因子:
4.6
通讯作者:
Sun, Han Dong
Sun, Han Dong
中科院分区:
综合性期刊3区
文献类型:
--
作者:
Van Duong Ta;Chen, Rui;Sun, Han Dong

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光学微腔对于光-物质相互作用的基础研究和微激光、光开关、滤光片等应用都具有重要意义。可调谐微谐振器,其中的共振模式可以被操纵,特别令人着迷。在这里,我们展示了一种独特的方法来机械调谐由不同大小的聚合物液滴形成的微谐振器。这些液滴是在弹性介质中自组装的。通过在液滴中掺入不同的染料分子,实现了波长在100 nm左右的光泵浦激光。激光作用归因于耳语画廊模式,并得到了严格的表征。当液滴直径减小到约14 μm时,获得了单纵模激光。机械变形清楚地显示了调谐激光模式。我们的发现为探索用于塑料光电子器件的灵活和可调谐的微激光器提供了一个极好的平台。
Optical microcavities are important for both fundamental studies of light-matter interaction and applications such as microlasers, optical switches and filters etc... Tunable microresonators, in which resonant modes can be manipulated, are especially fascinating. Here we demonstrate a unique approach to mechanically tuning microresonators formed by polymer droplets with varying sizes. The droplets are self-assembly inside an elastic medium. By incorporating different dye molecules into the droplets, optically pumped lasing with selective wavelengths in a range of about 100 nm are achieved. Lasing action is ascribed to whispering gallery modes, verified by rigorous characterizations. Single longitudinal mode lasing is obtained when the droplet diameter is reduced to about 14 μm. Tuning lasing modes are clearly demonstrated by mechanical deformation. Our finding provides an excellent platform for exploring flexible and tunable microlasers for plastic optoelectronic devices.
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