Deep subwavelength confinement and giant enhancement of light field by a plasmonic lens integrated with a metal-insulator-metal vertical nanocavity.
Deep subwavelength confinement and giant enhancement of light field by a plasmonic lens integrated with a metal-insulator-metal vertical nanocavity.
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DOI：
10.1364/oe.20.019060
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发表时间：
2012-08
期刊：
影响因子：
3.8
通讯作者：
Song Yue;Zhi Li;Jianjun Chen;Q. Gong
中科院分区：
文献类型：
--
作者：
Song Yue;Zhi Li;Jianjun Chen;Q. Gong
提出将金属-绝缘体-金属垂直纳米腔集成在等离子体透镜的中心。利用腔共振效应，集成等离子体透镜中心的光强比无腔时提高了5500倍，光场被紧紧地限制在一个小到6.0 × 10（-3）λ（0）（2）的光斑内。腔体的珀塞尔因子高达1400，保证了腔内光与物质相互作用的极大增强。此外，所提出的结构利用线偏振光激发和易于制造的优点。
A metal-insulator-metal vertical nanocavity is proposed to be integrated at the center of a plasmonic lens. Utilizing cavity resonance effect, the light intensity at the center of the integrated plasmonic lens gets enhancement up to 5500 times compared to that without the cavity, and the light field is tightly confined into a spot as small as 6.0 × 10(-3)λ(0)(2). The Purcell factor of the cavity reaches up to 1400, ensuring greatly enhanced light-matter interaction inside the cavity. Moreover, the proposed structure takes advantage of linearly polarized light excitation and easy fabrication.