Point-Defect-Localized Bound States in the Continuum in Photonic Crystals and Structured Fibers

Sachin Vaidya, Wladimir A. Benalcazar, Alexander Cerjan, Mikael C. Rechtsman

Research output: Contribution to journalArticlepeer-review

Abstract

We show that point defects in two-dimensional photonic crystals can support bound states in the continuum (BICs). The mechanism of confinement is a symmetry mismatch between the defect mode and the Bloch modes of the photonic crystal. These BICs occur in the absence of band gaps and therefore provide an alternative mechanism to confine light. Furthermore, we show that such BICs can propagate in a fiber geometry and exhibit arbitrarily small group velocity which could serve as a platform for enhancing nonlinear effects and light-matter interactions in structured fibers.

Original languageEnglish (US)
Article number023605
JournalPhysical review letters
Volume127
Issue number2
DOIs
StatePublished - Jul 9 2021

All Science Journal Classification (ASJC) codes

  • Physics and Astronomy(all)

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