Frequency independent, remotely reconfigurable passive coherent perfect absorber using conventional inkjet-printing technology

Sci Rep. 2022 Mar 28;12(1):5265. doi: 10.1038/s41598-022-08665-4.

Abstract

This work presents a systematic theoretical analysis and experimental validation of a novel coherent absorber which is printed through conventional inkjet-printing technology. The new absorber consists of a single resistively loaded sheet printed on a conventional plastic sheet, resulting a low complexity and passive design. The low-cost and easily fabricated absorber is frequency independent, polarization insensitive, wide-angle and we demonstrate its absorbance reconfigurability using a remote illumination as a control signal. Theoretical, numerical and experimental results are in good agreement. Specifically, experimental results shown that near perfect absorption (i.e., [Formula: see text]) can be achieved using a printed sheet of thickness [Formula: see text].