Year: 2025
Type: article
Abstract: We propose and validate a method for designing a broadband variable beamsplitter using a metamaterial with subwavelength thickness. Through theoretical analysis and numerical simulations, we demonstrate that the reflectance-to-transmittance ratio of a single-layer resonant metamaterial at its resonance frequency can be controlled by varying the spatial arrangement of the constituent meta-atoms, without altering their individual structures. Building on this theory, we further conjecture a method for achieving a frequency-independent reflectance-to-transmittance ratio across a broad spectral range. Numerical results confirm that a metamaterial with subwavelength thickness can be engineered to function as a broadband variable beamsplitter using the proposed approach. These findings contribute to the advancement of techniques for splitting and combining electromagnetic waves in compact systems.
Source: Nanophotonics
Authors: Yasuhiro Tamayama, Yugo Shibata
Institution: Nagaoka University of Technology
Language: English
Field: Materials Science
Domain: Physical Sciences
Open Access status: gold
Estimated APC paid: $2,995
OpenAlex ID: W4417124048