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nature materials 最新: CdS–SiO2–Ag复合纳米线
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3楼2011-09-04 23:29:30
4楼2011-09-05 07:22:20
★★★★★ 五星级,优秀推荐
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Abstract The manipulation of radiative properties of light emitters coupled with surface plasmons is important for engineering new nanoscale optoelectronic devices, including lasers, detectors and single photon emitters1–8. However, so far the radiative rates of excited states in semiconductors and molecular systems have been enhanced only moderately, typically by a factor of 10–50, producing emission mostly from thermalized excitons2,6,9–11. Here, we show the generation of dominant hot-exciton emission, that is, luminescence from non-thermalized excitons that are enhanced by the highly concentrated electromagnetic fields supported by the resonant whispering-gallery plasmonic nanocavities of CdS–SiO2–Ag core–shell nanowire devices. By tuning the plasmonic cavity size to match the whispering-gallery resonances, an almost complete transition from thermalized exciton to hot-exciton emission can be achieved, which reflects exceptionally high radiative rate enhancement of >103 and sub-picosecond lifetimes. Core–shell plasmonic nanowires are an ideal test bed for studying and controlling strong plasmon–exciton interaction at the nanoscale and opens new avenues for applications in ultrafast nanophotonic devices. |
10楼2011-09-14 08:41:18
简单回复
2011-09-05 07:22
回复
五星好评 顶一下，感谢分享！
2011-09-05 11:03
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五星好评 顶一下，感谢分享！
麦客0018楼
2011-09-06 12:32
回复
五星好评 顶一下，感谢分享！
yaingy11楼
2011-09-28 09:34
回复
五星好评 顶一下，感谢分享！
xjtu-sunhl12楼
2011-10-01 07:12
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五星好评 顶一下，感谢分享！
ahunano13楼
2011-10-01 08:11
回复
五星好评 顶一下，感谢分享！