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Far-field high resolution imaging is one of the research focus in the field of acoustics and optics in recent years. The greatest difficulty for high resolution imaging in the far field is the evanescent waves not being able to propagate in the medium. A kind of scatterers composed of uniformly spaced steel columns is presented in this work. Negative reflection of periodic structure can change the evanescent waves to the waves that can propagate to enhance imaging. A finite element simulation has been used to study and verify the feasibility of the scheme. Results show that with the sound wave of 3.4 mm wavelength one can obtain an imaging resolution of about 0.6 wavelength in the far field of 20 cm. We further note that by reducing the lattice constant of scatterers a higher far-field resolution imaging can be hopefully reached.
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Keywords:
- negative reflection /
- far field /
- imaging
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[1] Zhang X, Liu Z W 2008 Nature Mater. 7 435
[2] Wong A M H, Eleftheriades G V 2013 Scientific Reports 10 1038
[3] Pendry J B 2000 Phys. Rev. Lett. 85 3966
[4] Christensen J, de Abajo F J G 2012 Phys. Rev. Lett. 108 124301
[5] Garcia-Chocano V M, Christensen J, Sanchez-Dehesa J 2014 Phys. Rev. Lett. 112 144301
[6] Liu H, Liu D, Zhao H, Gao Y h 2013 Acta Phys. Sin. 62 194208 (in Chinese) [刘会, 刘丹, 赵恒, 高义华 2013 物理学报 62 194208]
[7] Zhan S G, Liang B M, Zhu X F, Chen J B, Zhuang S L 2014 Acta Phys. Sin. 63 154212 (in Chinese) [湛胜高, 梁斌明, 朱幸福, 陈家壁, 庄松林 2014 物理学报 63 154212]
[8] Quan X L, Yang X B 2009 Chin. Phys. B 18 5313
[9] Yu G J, Bu S, Wang X, Ji H Z 2012 Acta Phys. Sin. 61 194703 (in Chinese) [于国君, 卜胜利, 王响, 纪红柱 2012 物理学报 61 194703]
[10] Li C H, Jia H, Ke M Z, Li Y X and Liu Z Y 2014 J. Phys. D: Appl. Phys. 47 135102
[11] Ao X Y, Chan C T 2008 Phys. Rev. E 77 025601
[12] Christensen J, Jung J, Martin-Moreno L, Yin X, Fok L, Zhang X, Garcia-Vidal F J 2011 Nature Phys. 7 52
[13] Cheng Y, Zhou C, Wei Q, Wu D J, Liu X J 2013 Appl. Phys. Lett. 103 224104
[14] Salandrino A, Engheta N 2006 Phys. Rev. B 74 075103
[15] Jacob Z, Alekseyev L V, Narimanov E 2006 Optics Express 14 8247
[16] Liu Z W, Lee H, Xiong Y, Sun C, Zhang X 2007 Science 10 1126
[17] Andryieuski A, Lavrinenko A L 2006 Phys. Rev. B 86 121108
[18] Zhang T, Chen L, Li X 2013 Optics Express 21 20888
[19] Azana J, Chatellus G 2014 Phys. Rev. Lett. 112 213902
[20] Zhao D G, Ye Y T, Xu S J, Zhu X F, Yi L 2014 Appl. Phys. Lett. 104 043503
[21] Cheng Y C, Redondo J, Staliunas K 2014 Phys. Rev. A 89 033814
[22] Xu S, Qiu C, Liu Z 2012 J. Appl. Phys. 111 094505
[23] Lu M H, Feng L, Ni X, Chen Y F, Zhu Y Y, Zhu S N, Ming N B 2010 Phys. Rev. Lett. 104 164301
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