Boundary-Induced Embedded Eigenstate in a Single Resonator for Advanced Sensing
Abstract
Electromagnetic embedded eigenstates, also known as bound states in the continuum (BICs), hold a great potential for applications in sensing, lasing, enhanced nonlinearities and energy harvesting. However, their demonstrations so far have been limited to large-area periodic arrays of suitably tailored elements, with fundamental restrictions on the overall footprint and performance in presence of inevitable disorder. In this work, we demonstrate a BIC localized in a single subwavelength resonator obtained by suitably tailoring the boundaries around it, enabling a new degree of control for on-demand symmetry breaking. We experimentally demonstrate how boundary-induced BICs open exciting opportunities for sensing by tracing the dissolution of NaCl in water, determining evaporation rates of distilled and saltwater with a resolution of less than 1e-6 L using a tabletop experimental setup.
Keywords
Cite
@article{arxiv.2103.03685,
title = {Boundary-Induced Embedded Eigenstate in a Single Resonator for Advanced Sensing},
author = {Rasmus E. Jacobsen and Alex Krasnok and Samel Arslanagic and Andrei V. Lavrinenko and Andrea Alu},
journal= {arXiv preprint arXiv:2103.03685},
year = {2021}
}