[16p-B4-1~13] 4.1 Plasmonics and Nanophotonics

2:15 PM - 2:30 PM JST(5:15 AM - 5:30 AM UTC)English Presentation

[16p-B4-4] Spectroscopic thermal emitters based on bimetallic compounds for high temperature plasmonic applications

〇Andrea RuizPerona^1,2, Toan Tran Phuoc¹, Thien Duc Ngo¹, Tadaaki Nagao^1,2 (1.NIMS, 2.Hokkaido Univ.)

Keywords:

plasmonics,nanodevices

Spectroscopic infrared thermal emitters selectively emit or absorb infrared radiation with very narrow spectral resolution, making them increasingly appealing for applications such as plasmon-enhanced vibrational spectroscopy, material-selective heating/drying systems, thermophotovoltaics, or spectroscopic infrared light sources in gas sensors. Consequently, there is an increasing need to find materials with a strong plasmonic response and high-temperature stability suitable for use in high-temperature photo-energy applications, such as thermal emitters or thermal detectors. We propose binary metallic compounds such as nickel-based superalloys as promising candidates for photothermal applications due to their high oxidation resistance in air and good optical performance. In this study, nickel aluminum (NiAl) thin films are fabricated via direct current (DC) sputtering deposition under different growth conditions. These layers grow in unique uniaxial fashion, which yields high crystallinity and results in strong plasmonic polarizability within the IR spectral region. Simulations of plasmonic thermal emitters based on our material's optical properties have reached absorptivity/emissivity values close to 1 for targeted wavelengths. Plasmonic emitter devices following the simulation parameters are fabricated to demonstrate the optical performance of the materials. The experimental results demonstrate the applicability of nickel-based alloys similar to the case of metal borides for high-temperature plasmonic applications in vacuum as well as in atmosphere.