| FUNDAMENTAL AREAS OF PHENOMENOLOGY(INCLUDING APPLICATIONS) |
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Wave Optics in Discrete Excitable Media |
| GU Guo-Feng,WEI Hai-Ming,TANG Guo-Ning** |
| College of Physics Science and Technology, Guangxi Normal University, Guilin 541004 |
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| Cite this article: |
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GU Guo-Feng, WEI Hai-Ming, TANG Guo-Ning 2012 Chin. Phys. Lett. 29 054203 |
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Abstract Refraction and reflection of planar waves in a discrete excitable medium is numerically investigated by using the Greenberg–Hasting model. It is found that the medium is anisotropic because the speed of the planar wave depends on the excitability of the medium and the direction of wave propagation. The reflection, diffraction, refraction, double refraction and delayed refraction are observed by using the correct choice of model parameters. When the incident angle is larger than the critical angle, the reflection, which is a back refraction, takes place. The reflection angle changes with the incident angle. The refraction in certain situations obeys Snell's law. Also, our results demonstrate that the incident, refracted and reflected waves can have different periods. The reflected and refracted waves can disappear.
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Received: 01 September 2011
Published: 30 April 2012
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| PACS: |
42.25.Gy
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(Edge and boundary effects; reflection and refraction)
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47.54.-r
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(Pattern selection; pattern formation)
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