Multiresonance response in hyperbolic metamaterials
Bartosz Janaszek , Marcin Kieliszczyk , Anna Tyszka-Zawadzka , Paweł Szczepański
AbstractIn this paper we demonstrate a new class of anisotropic 1D hyperbolic metamaterials (HMMs) possessing multiresonant dispersion characteristics. With the help of an EMT-based model, we analyze HMMs with unit cells composed of layers characterized by various plasma frequencies, revealing multiple resonance transitions corresponding to the critical absorptions points. In particular, we show that relative locations of plasma frequencies of constituent materials and the unit cell’s geometry determine the type of dispersion characteristics as well as spectral locations of critical absorption points. It is shown that a multispectral low-loss highly dispersive medium is achieved in a structure comprising layers of closely located plasma resonances. Moreover, we present that pure metallic multilayer structure can exhibit hyperbolic dispersion. The obtained results possess a significant potential in applications where a multispectral character is required, including phase matching, multiple-point perfect absorption, as well as diffractionless imaging and focusing.
|Journal series||Applied Optics, ISSN 1559-128X, [0003-6935]|
|Publication size in sheets||106.75|
|Keywords in English||Metamaterials; Subwavelength structures, nanostructures|
|Score||= 30.0, 22-06-2020, ArticleFromJournal|
|Publication indicators||= 3; = 1; = 4.0; : 2018 = 1.237; : 2018 = 1.973 (2) - 2018=1.88 (5)|
|Citation count*||4 (2020-06-27)|
* presented citation count is obtained through Internet information analysis and it is close to the number calculated by the Publish or Perish system.