- Magnetic field-induced emissivity tuning of InSb-based metamaterials in the terahertz frequency regime doi link

Auteur(s): Andrew Caratenuto, Chen Fangqi, Tian Yanpei, Antezza M., Xiao Gang, Zheng Yi

(Article) Publié: Optical Materials Express, vol. 11 p.3141 (2021)
Texte intégral en Openaccess : openaccess

Ref HAL: hal-03327278_v1
DOI: 10.1364/OME.433003
Exporter : BibTex | endNote

This work demonstrates the magnetic field-induced spectral properties of metamaterials incorporating both indium antimonide (InSb) and tungsten (W) in the terahertz (THz) frequency regime. Nanostructure materials, layer thicknesses and surface grating fill factors are modified, impacting light-matter interactions and consequently modifying thermal emission. We describe and validate a method for determining spectral properties of InSb under an applied direct current (DC) magnetic field, and employ this method to analyze how these properties can be tuned by modulating the field magnitude. Notably, an InSb-W metamaterial exhibiting unity narrowband emission is designed, suitable as an emitter for wavelengths around 55 µm (approximately 5.5 THz), which is magnetically tunable in bandwidth and peak wavelength.