Optically transparent microwave absorber based on water-based moth-eye structures
Abstract
We propose an approach to realize an optically transparent microwave absorber based on water-based moth-eye metamaterial structures. The absorber is made of a periodic array of properly shaped glass caps infiltrated with distilled water. Analytical calculations and numerical simulations show that the water-based metamaterial absorbs electromagnetic waves over a wide spectral band ranging from 4GHz to well above 120GHz, showing absorption levels close to 100% for incident radiation that ranges from normal to grazing angles, for both TE and TM polarizations. Yet, the structure is optically transparent, offering exciting opportunities in a variety of civil and military applications, such as for camouflage and shielding systems and in energy harvesting structures.
Document Details
- Document Type
- Pub Defense Publication
- Publication Date
- Mar 09, 2021
- Source ID
- 10.1364/oe.418220
Entities
People
- Andrea Alù
- Giuseppe D'Aguanno
- Hoyeong Kwon
Organizations
- City University of New York
- Johns Hopkins University
- Korea Air Force Academy
- National Science Foundation
- Simons Foundation
- United States Department of Defense
- University of Maryland
- University of Texas at Austin