Second harmonic generation from the top of an Au-coated tip via a tapered fiber coupled microsphere resonator
Second harmonic generation from the top of an Au-coated tip via a tapered fiber coupled microsphere resonator
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DOI：
10.1117/12.929437
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发表时间：
2012-10
期刊：
影响因子：
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通讯作者：
F. Ren;Kazutaka Kitajima;H. Takashima;H. Fujiwara;K. Sasaki
中科院分区：
文献类型：
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作者：
F. Ren;Kazutaka Kitajima;H. Takashima;H. Fujiwara;K. Sasaki
证明了来自锥形光纤耦合微球谐振器的光与金涂层尖端的局域表面等离子体模式的有效耦合。为了通过锥形光纤耦合微球谐振器验证金属尖端的有效局部表面等离子体激发，我们测量了金涂层尖端顶部的二次谐波产生。从结果来看，尽管连续波激励很弱，但我们通过锥形光纤耦合微球谐振器系统成功地从金涂层尖端的顶部重复观察SHG，该系统可以将耦合效率约为63.2%的光聚焦到有效截面为358.2 nm2的金属尖端的纳米级域中。
The efficient coupling of light from a tapered fiber coupled microsphere resonator to localized surface plasmon modes of Au-coated tip was demonstrated. To verify efficient localized surface plasmon excitation at the metal tip via a tapered fiber coupled microsphere resonator, we measured second harmonic generation from the top of Au-coated tip. From the results, in spite of a weak CW excitation, we succeeded in repeatedly observing SHG from the top of the Au-coated tip via a tapered fiber coupled microsphere resonator system, which could focus the light with the coupling efficiency of about 63.2 % into the nanoscale domain of the metal tip with the effective cross section of 358.2 nm2.