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Meeting 2021 TMS Annual Meeting & Exhibition
Symposium Plasmonics in Nanocomposite Materials
Presentation Title Plasmonic Compound Nanohole Arrays
Author(s) Yiping Zhao
On-Site Speaker (Planned) Yiping Zhao
Abstract Scope By combining nanosphere lithography with oblique angle deposition, large-area asymmetric compound Ag nanohole arrays with nanorods inside or on top of the nanohole were patterned on substrates. Their properties were investigated both experimentally and by finite-difference-time-domain calculations. A new extraordinary optical transmission (EOT) mode is observed when the polarization direction is aligned with the long axis of the nanorods. Around this resonance wavelength, the real part of the effective permittivity also become zero, demonstrating the epsilon-near-zero (ENZ) property. The new EOT mode is found to be the result from the enhanced local radiation of the nanorods as well as the electromagnetic coupling to the nanoholes. The tunable resonance wavelength, EOT, strong near-field enhancement, and ENZ properties make the structure ideal for sensing applications. In particularly, index sensing and surface-enhanced Raman scattering/surface plasmon resonance (SERS/SPR) dual sensors for microRNA have been realized.
Proceedings Inclusion? Planned:
Keywords Nanotechnology, Thin Films and Interfaces, Modeling and Simulation


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