Dispersive bands of bound states in the continuum

• URL: http://arxiv.org/abs/2107.01603v1
• Date: Sun, 4 Jul 2021 12:26:19 GMT
• Title: Dispersive bands of bound states in the continuum
• Authors: Stefano Longhi
• Abstract summary: Bound states in the continuum (BICs) have provided a new paradigm in optics and photonics, especially at the nanoscale. We introduce the idea of a crystal made of BICs, in which an array of BICs are indirectly coupled via a common continuum of states. Results are illustrated for a chain of optical cavities side-coupled to a coupled-resonator optical waveguide.
• Score: 0.0
• License: http://arxiv.org/licenses/nonexclusive-distrib/1.0/
• Abstract: Bound states in the continuum (BICs), i.e. highly-localized modes with energy embedded in the continuum of radiating waves, have provided in the past decade a new paradigm in optics and photonics, especially at the nanoscale, with a range of applications from nano photonics to optical sensing and laser design. Here we introduce the idea of a crystal made of BICs, in which an array of BICs are indirectly coupled via a common continuum of states resulting in a tight-binding dispersive energy miniband embedded in the spectrum of radiating waves. The results are illustrated for a chain of optical cavities side-coupled to a coupled-resonator optical waveguide (CROW) with non-local contact points.

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