Optical seminar | 14 May 2021

In this talk, I will present our results on both the linear and nonlinear effects of a multilayer epsilon-near-zero metamaterial. First of all, we have used the ENZ feature of HMM as a substrate to manipulate the resonance of plasmonic nanoantennas. The localized surface plasmon resonance of metal nanoantenna is significantly influenced by the size, shape, and environment but also its substrate. 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 at different regions by tuning the ENZ wavelength of HMM.

1. A. R. Rashed, B. C. Yildiz, S. Ayyagari, and H. Caglayan, “Hot electron dynamics in ultrafast multilayer epsilon-near-zero metamaterials” Physical Review B (2020).
2. M. Habib, D. Briukhanova, N. Das, B. C. Yildiz, and H. Caglayan, “Controlling the plasmon resonance via epsilon-near-zero multilayer metamaterials” Nanophotonics 9 (11), 3637-3644A (2020).
3. M. Koivurova, T. Hakala, J. Turunen, A. T. Friberg, M. Ornigotti and H. Caglayan, “Metamaterials designed for enhanced ENZ properties” New Journal of Physics (2020).
4. B. C. Yildiz and H Caglayan "Epsilon-near-zero media coupled with localized surface plasmon modes" Phys. Rev. B 102, 165303 (2020)
5. F Ghasemzadeh, AR Rashed, H Caglayan "Phase singularity annihilation in plasmonic nano-apertures via epsilon-near-zero metamaterials editors-pick" APL Photonics 6, 016101 (2021)