The opportunities offered by energy absorbing, storing, and releasing in lossless systems are here exploited by exciting the zero-scattering condition of a metasurface-bounded open cavity. We investigate on the so-called virtual absorption condition supported by a partially open cavity, bounded by an infinite reflector and a metasurface. Starting from the theoretical analysis, we analytically find that the system exhibits a set of zeros of the scattering eigenvalues in the complex frequency plane, which correspond to the anomalous response of virtual absorption. The feasibility of the structure and its easy physical insights offered by the complex frequency analysis may enable the design of lossless systems with dynamic properties in energy.
Marini, A., Ramaccia, D. (2019). Metasurface-bounded open cavities supporting virtual absorption: free-space energy accumulation in lossless systems. In 13th International Congress on Artificial Materials for Novel Wave Phenomena, Metamaterials 2019 (pp.242-244). 345 E 47TH ST, NEW YORK, NY 10017 USA : Institute of Electrical and Electronics Engineers Inc. [10.1109/MetaMaterials.2019.8900833].
Metasurface-bounded open cavities supporting virtual absorption: free-space energy accumulation in lossless systems
Ramaccia, D
2019-01-01
Abstract
The opportunities offered by energy absorbing, storing, and releasing in lossless systems are here exploited by exciting the zero-scattering condition of a metasurface-bounded open cavity. We investigate on the so-called virtual absorption condition supported by a partially open cavity, bounded by an infinite reflector and a metasurface. Starting from the theoretical analysis, we analytically find that the system exhibits a set of zeros of the scattering eigenvalues in the complex frequency plane, which correspond to the anomalous response of virtual absorption. The feasibility of the structure and its easy physical insights offered by the complex frequency analysis may enable the design of lossless systems with dynamic properties in energy.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
