Presentation Information
[3E09]Fabrication and optical response of well-defined platinum nano-slit structures
*Yuyun Tan1, Kota Maeki1, Shunsuke Tanaka2,1, Jun Yoshinobu1 (1. The Institute for Solid State Physics, the University of Tokyo, 2. Department of Materials and Chemistry National Institute of Advanced Industrial Science and Technology)
The study introduces the fabrication and SEIRA evaluation of platinum (Pt) nano-slit structures, which remain underexplored in contrast to widely studied gold-based systems. By employing electron beam lithography and argon plasma etching, we successfully fabricated well-defined Pt nano-slits on CaF2(100) substrate. Infrared reflection spectra revealed polarization-dependent plasmonic behavior and a linear relationship between dip wavelength and slit length. Upon coating with PMMA, a Fano-like resonance at 1723 cm-1 was observed, indicating SEIRA enhancement due to coupling between localized surface plasmons and molecular vibrations. This work offers a promising approach for expanding SEIRA applications to catalytically active materials.