Paper 13111-53
Paper 13111-53
High aspect ratio double insulator plasmonic nanostructures towards gas sensing applications
21 August 2024 • 4:20 PM - 4:35 PM PDT | Conv. Ctr. Room 4
Abstract
In this work, we designed and fabricated high aspect ratio vertical plasmonic nanostructures geared towards gas sensing using infrared absorption. The structures have inner and out Au walls with an aspect ratio of 18.3 and 16.7, respectively. The gap between the walls is partially filled with SiO2. From finite-difference time-domain simulations, we found that the initial resonance frequency of the entire structure is dictated by the overall height of the inner Au walls, while the SiO2/air ratio at the gap can further tune the resonance frequency. This is experimentally demonstrated through the observed Fourier transform infrared measurements.
Presenter
RIKEN (Japan)
From April 1, 2024, Dr. Oguchi will be an Assistant Professor in Tokyo Institute of Technology (Tokyo Tech). She obtained her B.S. Physics degree from the National Institute of Physics in the University of the Philippines and her M.S. Optics degree from the Institute of Optics in the University of Rochester, NY, USA. She received her Doctor of Science degree (Electronic Chemistry) from Tokyo Tech, Japan in 2015 as part of a special joint PhD program between Tokyo Tech and RIKEN. Her research focuses on investigating the local physicochemical properties of nano-sized materials through the innovation of novel characterization techniques that incorporate various research fields, namely, physics and optics. Her main background is Raman spectroscopy (near, far, wherever the fields are) and she is now branching out to plasmonic nanostructure fabrication using electron beam lithography and electron beam evaporation.