Simultaneous realization of slow and fast acoustic waves using a fractal structure of Koch curve

被引：12

作者：

Ding, Jin ^{[1
]}

Fan, Li ^{[1
]}

Zhang, Shu-yi ^{[1
]}

Zhang, Hui ^{[1
]}

Yu, Wei-wei ^{[1
]}

机构：

[1] Nanjing Univ, Inst Acoust, Lab Modern Acoust, Nanjing 210093, Jiangsu, Peoples R China

来源：

SCIENTIFIC REPORTS | 2018年 / 8卷

基金：

中国国家自然科学基金;

关键词：

GROUP-VELOCITY; IMPEDANCE; ANTENNA;

D O I：

10.1038/s41598-018-19797-x

中图分类号：

O [数理科学和化学]; P [天文学、地球科学]; Q [生物科学]; N [自然科学总论];

学科分类号：

07 ; 0710 ; 09 ;

摘要：

An acoustic metamaterial based on a fractal structure, the Koch curve, is designed to simultaneously realize slow and fast acoustic waves. Owing to the multiple transmitting paths in the structure resembling the Koch curve, the acoustic waves travelling along different paths interfere with each other. Therefore, slow waves are created on the basis of the resonance of a Koch-curve-shaped loop, and meanwhile, fast waves even with negative group velocities are obtained due to the destructive interference of two acoustic waves with opposite phases. Thus, the transmission of acoustic wave can be freely manipulated with the Koch-curve shaped structure.

引用

页数：7

共 30 条

[1] Small and high-directivity bow-tie patch antenna based on the Sierpinski fractal [J].

Anguera, J ;

Puente, C ;

Borja, C ;

Montero, R ;

Soler, J .

MICROWAVE AND OPTICAL TECHNOLOGY LETTERS, 2001, 31 (03) :239-241

[2] OBSERVATION OF ELECTROMAGNETICALLY INDUCED TRANSPARENCY [J].

BOLLER, KJ ;

IMAMOGLU, A ;

HARRIS, SE .

PHYSICAL REVIEW LETTERS, 1991, 66 (20) :2593-2596

[3] High directivity fractal boundary microstrip patch antenna [J].

Borja, C ;

Font, G ;

Blanch, S ;

Romeu, J .

ELECTRONICS LETTERS, 2000, 36 (09) :778-779

[4] Two-dimensional fractal metasurface and its application to low profile circularly polarized antennas [J].

Cai, T. ;

Wang, G. -M. ;

Zhao, J. F. ;

Yao, M. .

JOURNAL OF ELECTROMAGNETIC WAVES AND APPLICATIONS, 2015, 29 (03) :410-423

[5] Effective Design of Novel Compact Fractal-Shaped Microstrip Coupled-Line Bandpass Filters for Suppression of the Second Harmonic [J].

Chen, Wen-Ling ;

Wang, Guang-Ming .

IEEE MICROWAVE AND WIRELESS COMPONENTS LETTERS, 2009, 19 (02) :74-76

[6]

Cheng Y, 2015, NAT MATER, V14, P1013, DOI [10.1038/NMAT4393, 10.1038/nmat4393]

[7] Slow sound propagation in a sonic crystal linear waveguide [J].

Cicek, Ahmet ;

Kaya, Olgun Adem ;

Yilmaz, Mukremin ;

Ulug, Bulent .

JOURNAL OF APPLIED PHYSICS, 2012, 111 (01)

[8] Negative group velocity propagation in a highly nonlinear fiber embedded in a stimulated Brillouin scattering laser ring cavity [J].

Deng, Dinghuan ;

Gao, Weiqing ;

Liao, Meisong ;

Duan, Zhongchao ;

Cheng, Tonglei ;

Suzuki, Takenobu ;

Ohishi, Yasutake .

APPLIED PHYSICS LETTERS, 2013, 103 (25)

[9] Slowing down light using a dendritic cell cluster metasurface waveguide [J].

Fang, Z. H. ;

Chen, H. ;

Yang, F. S. ;

Luo, C. R. ;

Zhao, X. P. .

SCIENTIFIC REPORTS, 2016, 6

[10] Invisible omnidirectional lens for flexural waves in thin elastic plates [J].

Jin, Yabin ;

Torrent, Daniel ;

Djafari-Rouhani, Bahram .

JOURNAL OF PHYSICS D-APPLIED PHYSICS, 2017, 50 (22)

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