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

Journal Article · 08 July 2021 · Physical Review Letters

DOI: https://doi.org/10.1103/physrevlett.127.023605 · OSTI ID:1810372

Vaidya, Sachin  ^[1]; Benalcazar, Wladimir A.  ^[1]; Cerjan, Alexander  ^[2]; Rechtsman, Mikael C.  ^[1]

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1. Pennsylvania State Univ., University Park, PA (United States)
2. Pennsylvania State Univ., University Park, PA (United States); Sandia National Lab. (SNL-NM), Albuquerque, NM (United States); Sandia National Lab. (SNL-NM), Albuquerque, NM (United States). Center for Integrated Nanotechnologies (CINT)

In this work, 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.

• Research Organization: Sandia National Laboratories (SNL-NM), Albuquerque, NM (United States)
• Sponsoring Organization: US Office of Naval Research (ONR); USDOE National Nuclear Security Administration (NNSA); USDOE Office of Science (SC)
• Grant/Contract Number: AC04-94AL85000; NA0003525
• OSTI ID: 1810372
• Report Number(s): SAND--2021-8390J; 697225
• Journal Information: Physical Review Letters, Journal Name: Physical Review Letters Journal Issue: 2 Vol. 127; ISSN 0031-9007
• Publisher: American Physical Society (APS)Copyright Statement
• Country of Publication: United States
• Language: English