Ultra-narrowband mid-infrared absorber based on Mie resonance in dielectric metamaterials

Ultra-narrowband absorber can be applied in many applications. We propose a mid-infrared ultra-narrowband absorber with TM-polarization (magnetic field is parallel to grating grooves) based on dielectric metamaterials in this paper. The simulation results show that the absorption rate larger than 0.99 can be achieved at the resonance wavelength, and the absorption bandwidth is less than 10nm. The simulated field distribution shows that the ultra-narrowband absorption in this absorber is originated from Mie resonance. In addition, the absorber remains high absorption rates up to 4 degree which means our absorber has high directivity. Our results show that the ultra-narrowband absorbers can be applied as a thermal emitter.The accepted manuscript in pdf format is listed with the files at the bottom of this page. The presentation of the authors' names and (or) special characters in the title of the manuscript may differ slightly between what is listed on this page and what is listed in the pdf file of the accepted manuscript; that in the pdf file of the accepted manuscript is what was submitted by the author