A new scientific article is published in the Journal of Physics: Conference Series, with contributions from the ITMO University, College of Physics (Jilin University), State Key Laboratory of Integrated Optoelectronics (Jilin University), Institute of Telecommunications, Nonlinear Physics Centre (Research School of Physics, Australian National University) and Kotel’nikov Institute of Radio Engineering and Electronics of RAS.
What the paper is about?
We uncover a novel mechanism of superscattering from subwavelength resonators linked to the physics of bound states in the continuum (BICs). Enhanced scattering occurs due to constructive interference within the Friedrich-Wintgen mechanism of interfering resonances. Through this process, the scattering cross section of a single resonance can exceed the currently established limit. We develop a general non-Hermitian model to describe interfering resonances of quasi-normal modes, and study subwavelength dielectric nonspherical resonators exhibiting avoided crossing resonances and quasi-BIC states. Our results reveal novel physics of nonHermitian systems suggesting important applications for metadevices.
What are the results?
We propose a novel strategy to realize superscattering based on the Friedrich-Wintgen mechanism of BIC. Our theory demonstrates the existence of ‘super-dipole’ resonances with enhanced dipole scattering beyond the accepted limit in a subwavelength cavity. Besides the fundamental interest, our work might pave the way to new ways of manipulating light-matter interactions at the nanoscale.
The work is open to access in the Journal of Physics: Conference Series, click on this link to read the full paper.
Find out more on the research of the Institute of Telecommunications on the projects page and blog page related to research papers.