Parallel acoustic near-field microscope: A steel slab with a periodic array of slits
Parallel acoustic near-field microscope: A steel slab with a periodic array of slits
复制标题
平行声近场显微镜：具有周期性狭缝阵列的钢板
DOI：
10.1103/physreve.80.026603
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发表时间：
2009-08-01
影响因子：
2.4
通讯作者：
Liu, Zhengyou
中科院分区：
文献类型：
--
作者：
Liu, Fengming;Cai, Feiyan;Liu, Zhengyou
我们提出了一种实用的声学近场显微镜，它只是一个带有周期性亚波长狭缝阵列的钢板。近场通过入射倏逝波和结构板支持的声导模的耦合来传输。从理论上推导了结构板的透射系数作为横向波矢量的函数，并采用理论模型来研究该装置的成像。数值模拟也验证了理论结果，表明确实可以实现高质量的亚波长成像。
We propose a practical acoustic near-field microscope, which is simply a steel slab with periodic array of subwavelength slits. The near field is transported by the coupling of the incident evanescent waves and the acoustic guided modes supported by the structured slab. The transmission coefficients of the structured slab as a function of the transverse wave vector are theoretically derived, and a theoretical model is employed to study the imaging of the proposed device. Numerical simulations are also performed to verify the theoretical results, which show that subwavelength imaging with good quality can indeed be realized.