Effects of using lossy materials on the metal-insulator-metal nanostructure absorption spectrum

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

Metal-insulator-metal metasurfaces (MIM-M) structures can achieve near-unity absorptance at sub-wavelength volumes. A conventional approach to tune the absorption wavelength and the bandwidth of MIM-Ms is to change the geometrical parameters of the structure. In this research, we investigate numerically a new approach to achieve enhanced absorption in MIM-Ms in the mid-infrared spectral region by using both lossy metals and a lossy dielectric. The absorption in the dielectric spacer layer is attributed to the Berreman and epsilon near-zero modes in combination with the dielectric intrinsic loss. The simulations have revealed the presence of additional absorption peaks compared with the case of lossless dielectrics. In particular, the effects of the dielectric thickness and the radiation incident angle on the absorption spectra of the proposed MIM-M structures have been investigated.

Original languageEnglish
Title of host publicationMetamaterials, Metadevices, and Metasystems 2019
EditorsNader Engheta, Mikhail A. Noginov, Nikolay I. Zheludev, Nikolay I. Zheludev
PublisherSPIE
ISBN (Electronic)9781510628533
DOIs
StatePublished - 2019
EventMetamaterials, Metadevices, and Metasystems 2019 - San Diego, United States
Duration: Aug 11 2019Aug 15 2019

Publication series

NameProceedings of SPIE - The International Society for Optical Engineering
Volume11080
ISSN (Print)0277-786X
ISSN (Electronic)1996-756X

Conference

ConferenceMetamaterials, Metadevices, and Metasystems 2019
CountryUnited States
CitySan Diego
Period08/11/1908/15/19

Keywords

  • Lossy materials
  • Metal-insulator-metals
  • Metasurfaces
  • Mid-infrared
  • Plasmonics
  • Selective absorbers

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  • Cite this

    Khayat Jafari, A., Bernussi, A., & Grave De Peralta, L. (2019). Effects of using lossy materials on the metal-insulator-metal nanostructure absorption spectrum. In N. Engheta, M. A. Noginov, N. I. Zheludev, & N. I. Zheludev (Eds.), Metamaterials, Metadevices, and Metasystems 2019 [1108024] (Proceedings of SPIE - The International Society for Optical Engineering; Vol. 11080). SPIE. https://doi.org/10.1117/12.2528013