Lee, Hwa-Seub Cha, Jung-Suk Jin, Jun-Young Ko, Young-Jin Seong, Tae-Yeon 2024-01-19T11:01:43Z 2024-01-19T11:01:43Z 2022-11-04 2022-10 0003-6951 https://pubs.kist.re.kr/handle/201004/114468 To fabricate a thermally stable optical filter in the mid-infrared (MIR) region, a plasmonic metal disk array (PMDA) using tantalum (Ta) was proposed, and the filter performance was compared with that of conventional silver (Ag)-based PMDAs. A finite-difference time-domain method was utilized to systematically analyze the effects of geometric configuration and constituent materials on the optical properties of PMDA filters with a periodic hexagonal lattice. Unlike the Ag PMDA filters, whose transmission dip at resonance wavelengths gradually decreased with increasing temperature, the Ta PMDA filters revealed almost the same transmission spectra even after annealing at 700 & DEG;C for 30 min. The Ta-based MIR PMDA filter exhibited similar optical properties to those of the Ag PMDA. The PMDAs with a duty cycle (d.c.) of 60% exhibited stop band spectra with sufficiently deep dip and wide linewidth. MIR filters fabricated with the Ta disks were demonstrated to quantify different types of alcohols through the monitoring of transmission spectra. (C) 2022 Author(s).All article content, except where otherwise noted, is licensed under a Creative Commons Attribution (CC BY)license (http://creativecommons.org/licenses/by/4.0/). English American Institute of Physics Fabrication of thermally stable mid-infrared optical filters using tantalum microdisc array Article 10.1063/5.0087318 1 Applied Physics Letters, v.121, no.16 Applied Physics Letters 121 16 Y scie scopus 000870545400001 Physics, Applied Physics Article SOLAR ABSORBERS SPECTROSCOPY METHANOL EMITTER ETHANOL PLASMA GOLD