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Frequency independent, remotely reconfigurable passive coherent perfect absorber using conventional inkjet-printing
Stylianos D Assimonis1, Gabriel G Machado2, Vincent Fusco2
1Centre for Wireless Innovation (CWI), Institute of Electronics, Communications and Information Technology (ECIT), School of Electronics, Electrical Engineering and Computer Science (EEECS), Queen's University Belfast, Belfast, BT3 9DT, UK. s.assimonis@qub.ac.uk.
Scientific Reports
|March 29, 2022
Summary
Researchers developed a novel inkjet-printed coherent absorber. This low-cost, reconfigurable device achieves near-perfect absorption, offering a versatile solution for various applications.
Area of Science:
- Electromagnetics and Metamaterials
- Additive Manufacturing
- Nanotechnology
Background:
- Conventional absorbers often suffer from complexity, high cost, and limited tunability.
- Inkjet printing offers a low-cost, scalable, and versatile fabrication method for advanced materials.
Purpose of the Study:
- To theoretically analyze and experimentally validate a novel, inkjet-printable coherent absorber.
- To demonstrate the absorber's frequency independence, polarization insensitivity, wide-angle performance, and reconfigurability.
Main Methods:
- Systematic theoretical analysis and numerical simulations.
- Experimental validation using inkjet-printed resistively loaded sheets on plastic substrates.
- Demonstration of reconfigurability via remote illumination control.
Main Results:
- Achieved near-perfect absorption ([Formula: see text]) with a simple, passive design.
- The absorber exhibited frequency independence, polarization insensitivity, and wide-angle characteristics.
- Demonstrated successful reconfigurability of absorbance using remote illumination.
Conclusions:
- Inkjet printing enables the fabrication of high-performance, reconfigurable coherent absorbers.
- The developed absorber offers a low-cost, versatile solution for applications requiring precise light control.
