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The model of acoustical double negative medium and the refraction of wave packets in it

K.V. Dmitriev

Memoirs of the Faculty of Physics 2016. N 5.

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Annotation

The example of a mechanical system which behaves like a double negative medium within a certain frequency band is suggested. The analytical expressions for the frequency dependence of its effective density and compressibility are derived. The results of numerical simulations in the two–dimensional case of an impulse propagating through the layer made of the considered medium are presented. The presence of negative refraction is shown while the causality principle is satisfied.

PACS:
43.20.+g General linear acoustics
43.35.+d Ultrasonics, quantum acoustics, and physical effects of sound
43.60.+d Acoustic signal processing
Rissian citation:
К. В. Дмитриев.
Модель акустической дважды отрицательной среды и преломление в ней двумерных волновых пакетов.
Учен. зап. физ. фак-та Моск. ун-та. 2016. № 5. 165104.
Authors
K.V. Dmitriev
Department of acoustics, Faculty of Physics, Lomonosov Moscow State University, Moscow 119991, Russia
Issue 5, 2016

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