Ultra-narrowband Emitters/Absorbers Based on Metal–Insulator–Metal Stacks for Nondispersive Infrared Gas Sensors

Aisheng Yu,Wei Li,Tie Li,Yuelin Wang

doi:10.18494/sam.2018.2001

Abstract

Ultra-narrowband Emitters/Absorbers Based on Metal–Insulator–Metal Stacks for Nondispersive Infrared Gas Sensors

Highlights

Nondispersive infrared (NDIR) sensors, based on the finger-print absorption of gases or liquids in the mid-infrared range, are in high demand owing to increasing number of requirements for indoor air or outdoor portable environment monitoring because of features such as their low cost, miniature sensing systems, and small volume
The near-field enhanced surface lattice resonance (SLR) has been utilized for surface-enhanced Raman scattering(15) or refractive index sensing(16) on Metallic particle array fabricated on a transparent Substrate (MS) structures
The full width at half maximum (FWHM) of SLR is an order of magnitude lower than that of the traditional LSPR in MIM structures, which may be adopted to realize ultra-narrowband emitters/absorbers for high-performance NDIR gas sensors

Summary

Introduction

Nondispersive infrared (NDIR) sensors, based on the finger-print absorption of gases or liquids in the mid-infrared range, are in high demand owing to increasing number of requirements for indoor air or outdoor portable environment monitoring because of features such as their low cost, miniature sensing systems, and small volume. A conventional NDIR system contains an optical filter to tailor the broadband spectrum into a narrowband, which wastes most of the energy, and increases the complexity of the whole system Driven by this requirement, metal–insulator–metal (MIM) structures based on localized surface. Surface lattice resonances (SLRs) with ultra-narrowbands are investigated in metallic particle arrays,(10–14) which have the potential to replace LSPRs or improve the performance of LSPRs in ultra-narrowband applications. The near-field enhanced SLR has been utilized for surface-enhanced Raman scattering(15) or refractive index sensing(16) on Metallic particle array fabricated on a transparent Substrate (MS) structures. The full width at half maximum (FWHM) of SLR is an order of magnitude lower than that of the traditional LSPR in MIM structures, which may be adopted to realize ultra-narrowband emitters/absorbers for high-performance NDIR gas sensors

Simulations and Experiments

Conclusions