Hyperbolic metamaterials for utilizing epsilon-near-zero features

Humeyra Caglayan

doi:10.1117/12.2593688

1 August 2021 Hyperbolic metamaterials for utilizing epsilon-near-zero features

Humeyra Caglayan

Author Affiliations +

Proceedings Volume 11795, Metamaterials, Metadevices, and Metasystems 2021; 117951C (2021) https://doi.org/10.1117/12.2593688
Event: SPIE Nanoscience + Engineering, 2021, San Diego, California, United States

Abstract

In this study, we obtained epsilon-near-zero metamaterial at visible range by designing and fabricating a metal-dielectric multilayer anisotropic hyperbolic metamaterial. To do this, we experimentally characterize and extract the permittivity. We have used the epsilon-near-zero (ENZ) feature of hyperbolic metamaterial as a substrate to manipulate the resonance of plasmonic nanoantennas. We demonstrate that the vanishing index of the substrate slows down the resonance shift of the antenna, known as pinning eﬀect. Moreover, we have controlled the pinning effect. Later, we show by optically pumping with fs pulses at a proper wavelength the ENZ point of the structure alters, in comparison to the linear case. The change in the effective permittivity happens in the order of unity, leading to ultrafast light-induced refractive index change. The localized surface plasmon resonance of metal nanoantenna is signiﬁcantly inﬂuenced by the size, shape, and environment but also its substrate.

Conference Presentation

Citation Download Citation

Humeyra Caglayan "Hyperbolic metamaterials for utilizing epsilon-near-zero features", Proc. SPIE 11795, Metamaterials, Metadevices, and Metasystems 2021, 117951C (1 August 2021); https://doi.org/10.1117/12.2593688

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