Plasmonics in Nanocomposite Materials: From Theory to Application Session II
Sponsored by: TMS Structural Materials Division, TMS: Composite Materials Committee
Program Organizers: Nasrin Hooshmand, Georgia Institute of Technology; Simona Hunyadi Murph, Savannah River National Laboratory; Mahmoud Abdelwahed, The University of Texas at San Antonio
Monday 2:00 PM
March 15, 2021
Room: RM 45
Location: TMS2021 Virtual
Session Chair: Sajanlal R Panikkanvalappil, Dana-Farber Cancer Institute
2:00 PM Invited
Emerging Anisotropic 2D Layered Materials for Plasmonics and Polaritonics: Koray Aydin1; 1Northwestern University
I will present theoretical investigations on mono-layer borophene plasmons at optical frequencies. Borophene has recently expanded the 2D materials family after its successful deposition on silver substrates. We theoretically investigate the plasmonic properties of nanostructured monolayer borophene using full-field electromagnetic simulations and demonstrate that borophene nanoribbon and nanopatch arrays can support localized plasmon resonances at visible and near-infrared wavelengths. Due to its puckered crystal structure and vacancy distribution in hexagonal lattice, borophene exhibits strong anisotropic in-plane properties which makes it an unconventional plasmonic material. I will also introduce MoO3 as an anisotropic photonic and polaritonic material. MoO3 is a layered material that exhibits both in and out-of-the-plane anisotropic polaritonic response at mid-IR wavelengths. We designed and experimentally demonstrated an anisotropic polaritonic absorber and showed that one can couple to all phonon modes and address them individually either using structural tunability or polarization control of incident infrared radiation.
2:30 PM Invited
Plasmonic Compound Nanohole Arrays: Yiping Zhao1; 1University Of Georgia
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.
3:00 PM Invited
Electron Transfer and Catalysis in Plasmonic Nanocomposite Systems: Patrick Ward1; Simona Murph1; 1Savannah River National Laboratory
Localized surface plasmon resonances provide unique mechanisms for electron transfer processes in nanocomposite systems. Additionally, these electrons can be leveraged to provide pathways for the development of novel energy conversion and storage devices. By controlling the shape, size, and composition of nanomaterials, the excitation wavelength and electron transfer mechanisms can be altered. Herein, the fundamentals of electron transfer mechanisms in plasmonic nanomaterial systems will be discussed and the potential for these plasmonic systems to drive chemical reactions. Examples of surface plasmon induced catalysis will be provided as well as potential applications for advanced energy storage and conversion devices.