The Acoustics Abnormal Reflection Based on the Generalized Snell's Law
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摘要: 通过对广义Snell（斯涅尔）反射定律的分析，提出了一种亚波长的声学微结构，该结构通过对反射界面相位的设计来控制反射波波矢方向，从而实现对声波反射方向的调控。利用COMSOL仿真软件对该结构仿真模拟，并分别利用易拉罐阵列及通过3D打印技术制作的声学器件对其反射声场进行试验测量。试验结果证明在声波正入射条件下可产生不同角度偏转的异常反射，数值模拟和试验测量结果与理论计算数据基本吻合，表明该结构可以有效地获得任意可调的反射角。该研究在音乐厅设计、超声医学等领域有应用潜力。Abstract: Based on the generalized Snell's reflection law, an acoustic artificial structure was designed to utilize the spatial distribution of the reflection phase to steer the outgoing direction of the reflected acoustic wave. The reflected acoustic field of this acoustic structure is studied by simulation and measurement. The experimental results well match the theoretical predictions, proving that the designed acoustic structure can effectively produce different deviation angles under normal incident condition, leading the reflected wave to propagate along the abnormal reflection angle as anticipated. This study may have potential applications in various fields such as music hall design and ultrasound medical treatment.
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[1] ENGHETA N. Metamaterials:physics and engineering explorations[M]. Piscatsway:Wiley-IEEE Press, 2006.
[2] SOLYMAR L, SHAMONIA E. Waves in metamaterials[M].Oxford:Oxford University Press, 2009.
[3] REED E J, SOLJACIC M, JOANNOPOULOS J D. Reversed Doppler effect in photonic crystal[J].Physical Review Letters, 2003,91(13):133901.
[4] LUO C, JOHNSON S G, TANNOPOULOS J D. All-angle negative refraction without negative effective index[J].Physical Review B,2002,65(20):201104-1-201104-4.
[5] PARIMI P V, LU W T, VODO P, et al. Photonic crystal:imaging by flat lens using negative refraction[J].Nature,2003,426(6965):404.
[6] 程守洙,江之永.普通物理学[M].北京:高等教育出版社, 2006:108-109. [7] YU N, GENEVET P, KATS M A, et al. Light propagation with phase discontinuities:generalized laws of reflection and refraction[J]. Science,2011,334(6054):333-337.
[8] 韩璐.推导广义的反射定律和折射定律的两种方法[J].大学物理,2013,32(3):49-50. [9] LI Y, LIANG B, GU Z M, et al. Reflected wavefront manipulation based on ultrathin planar acoustic metasurfaces[J]. Scientific Reports, 2013, 3(7464):2546-2548.
[10] ZHAO J, LI B, CHEN Z N, et al. Redirection of sound waves using acoustic metasurface[J]. Applied Physics Letters, 2013, 103(15):151604-1-3.
[11] XIE Y, WANG W, CHEN H, et al. Wavefront modulation and subwavelength diffractive acoustics with an acoustic metasurface[J]. Nature Communications, 2014, 5:5553-5555.
[12] TANG K, QIU C, KE M, et al. Anomalous refraction of airborne sound through ultrathin metasurfaces[J]. Scientific Reports, 2014, 4(4):100-102.
[13] ZHANG L, LI Y, JIANG X. Metascreen-based acoustic passive phased array[J]. Physical Review Applied, 2015, 4(2):024003-1-024003-2.
[14] YE L, QIU C, LU J, et al. Making sound vortices by metasurfaces[J]. AIP Advances, 2016, 6(8):085007-2-085007-3.
[15] LI Y, QI S, ASSOUAR M B.Theory of metascreen-based acoustic passive phased array[J]. New Journal of Physics, 2016, 18(4):043024-043026.
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