Metric-signature topological transitions in dispersive metamaterials

Autor(es)

Reyes-Gomez, E. ^[1] ; Cavalcanti, S. B. ^[2] ; Oliveira, L. E. ^[3] ; de Carvalho, C. A. A. ^[4]

Afiliação do(s) autor(es)

^[1] Univ Antioquia UdeA, Inst Fis, Fac Ciencias Exactas & Nat, Medellin - Colombia

^[2] Univ Fed Alagoas, Inst Fis, BR-57072970 Maceio, Alagoas - Brazil

^[3] Univ Estadual Campinas Unicamp, Inst Fis, BR-13083859 Sao Paulo - Brazil

^[4] CNPEM, BR-13083970 Sao Paulo - Brazil

• Tipo de documento: Artigo Científico
• Fonte: Physical Review E; v. 89, n. 3 MAR 14 2014.
• Citações Web of Science: 4

Resumo

The metric signature topological transitions associated with the propagation of electromagnetic waves in a dispersive metamaterial with frequency-dependent and anisotropic dielectric and magnetic responses are examined in the present work. The components of the reciprocal-space metric tensor depend upon both the electric permittivity and magnetic permeability of the metamaterial, which are taken as Drude-like dispersive models. A thorough study of the frequency dependence of the metric tensor is presented which leads to the possibility of topological transitions of the isofrequency surface determining the wave dynamics inside the medium, to a diverging photonic density of states at some range of frequencies, and to the existence of large wave vectors' modes propagating through the metamaterial. (AU)

• Processo FAPESP: 12/51691-0 - A física de novos materiais e nanoestruturas semicondutoras
• Beneficiário: Luiz Eduardo Moreira Carvalho de Oliveira
• Modalidade de apoio: Auxílio à Pesquisa - Temático