Negative refractive index and negative refraction of waves in lossy metamaterials

作者：Ji L; Varadan V V^*

来源：Electronics Letters, 2016, 52(4): 260-261.

DOI：10.1049/el.2015.3416

• metamaterials
• wave propagation
• negative energy refraction
• negative phase refraction
• lossy metamaterials
• hypothetical nonlossy metamaterials
• S-parameters
• split ring resonator-wire metamaterial samples
• wave propagation
• transverse-electric polarisation
• positive refractive index

An experimental study of the conditions for negative energy refraction and negative phase refraction in lossy metamaterials is provided. In hypothetical non-lossy metamaterials, the angles of phase and energy refraction are one and the same. Using measured S-parameters of split ring resonator-wire metamaterial samples, it is shown that negative refractive index is not a requirement for negative energy refraction in lossy metamaterials. It was assumed that the sample is effectively homogeneous and isotropic in the direction of wave propagation. For transverse-electric polarisation, negative energy refraction with a positive refractive index was demonstrated.

• 出版日期2016-2-18