Using phonon resonances as a route to all-angle negative refraction in the far-infrared region: the case of crystal quartz |
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| Authors: | Rodrigues da Silva R Macêdo da Silva R Dumelow T da Costa J A P Honorato S B Ayala A P |
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| Affiliation: | Departamento de Física, Universidade do Estado do Rio Grande do Norte, Costa e Silva, 59610-090 Mossoró RN, Brazil. |
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| Abstract: | We consider how all-angle negative refraction may be induced in anisotropic crystals by making use of the phonon response. We investigate the example of crystal quartz at far-infrared wavelengths. Reflection and transmission measurements confirm the expected behavior, and show relatively high transmission efficiency at frequencies at which negative refraction occurs. |
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