Highly directional source radiation using isotropic transformation acoustics

2017 ◽  
Vol 141 (5) ◽  
pp. 3639-3640 ◽  
Author(s):  
Andrew Norris ◽  
Xiaoshi Su
Keyword(s):  
Source Radiation ◽  
Directional Source ◽  
Transformation Acoustics

Polarization of microwave noise source radiation in the 30 GHz to 300 GHz range

1988 ◽  
Vol 9 (12) ◽  
pp. 1141-1151
Author(s):  
M. K. Poutous ◽  
P. Petrone ◽  
A. Ghaemi ◽  
K. D. M�ller ◽  
J. B. Heaney
Keyword(s):  
Noise Source ◽  
Source Radiation ◽  
Microwave Noise

scholarly journals Quantum rod emission coupled to plasmonic lattice resonances: A collective directional source of polarized light

2012 ◽  
Vol 100 (11) ◽  
pp. 111103 ◽  
Author(s):  
S. R. K. Rodriguez ◽  
G. Lozano ◽  
M. A. Verschuuren ◽  
R. Gomes ◽  
K. Lambert ◽  
...  
Keyword(s):  
Polarized Light ◽  
Quantum Rod ◽  
Directional Source

Sound-transparent anisotropic media for backscattering-immune wave manipulation

2022 ◽  
Author(s):  
Wei-Wei Kan ◽  
Qiu-Yu Li ◽  
Lei Pan
Keyword(s):  
Acoustic Signal ◽  
Acoustic Signals ◽  
Acoustic Medium ◽  
Subwavelength Structures ◽  
Beam Splitting ◽  
Acoustic Parameters ◽  
Straight Path ◽  
Specific Order ◽  
Anisotropic Layers ◽  
Transformation Acoustics

Abstract The scattering behavior of the anisotropic acoustic medium is analyzed to reveal the possibility of routing acoustic signals through the anisotropic layers with no backscattering loss. The sound-transparent effect of such medium is achieved by independently modulating the anisotropic effective acoustic parameters in a specific order, and experimentally observed in a bending waveguide by arranging the subwavelength structures in the bending part according to transformation acoustics. With the properly designed filling structures, the original distorted acoustic field in the bending waveguide is restored as if the wave travels along a straight path. The transmitted acoustic signal is maintained nearly the same as the incident modulated Gaussian pulse. The proposed schemes and the supporting results could be instructive for further acoustic manipulations such as wave steering, cloaking and beam splitting.

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