Accessible phases via wave impedance engineering with PT -symmetric metamaterials
作者： Maria Kafesaki , Maria Kafesaki , Costas M. Soukoulis , Costas M. Soukoulis , Eleftherios N. Economou
DOI: 10.1103/PHYSREVB.100.205133
关键词:
摘要: Optical systems that respect parity-time ($\mathit{PT}$) symmetry can be realized with proper incorporation of gain/loss materials. However, due to the absence magnetic response at optical frequencies, wave impedance is defined entirely by their permittivity and, hence, $\mathit{PT}$-symmetric character controlled solely via refractive index. Here, we show separate tuning enabled metamaterials grant access wide control exceptional points, appearance mixed phases (coexistence PT-symmetric and PT-broken phases) occurrence phase reentries, not easily realizable natural
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