Controllable finite ultra-narrow quality-factor peak in a perturbed Dirac-cone band structure of a photonic crystal slab

Abstract

We show that by using a perturbed photonic Dirac-cone, one can realize ultra-narrow and finite Q-factor peak in the wavevector space, with both the peak value and the width separately tunable. We also discuss a lower bound in the minimal viable width given a peak Q-value while maintaining sufficient Q differentiation among modes. The strong angular and frequency Q-selection finds applications in optical devices where strong angle- and frequency-selection is needed.

arXiv comment6 pages, 4 figures

References in corpus (12)

• Asymmetric metasurfaces with high-$Q$ resonances governed by bound states in the continuum
• Resonantly Trapped Bound State in the Continuum Laser
• Spawning rings of exceptional points out of Dirac cones
• Topologically Enabled Ultra-high-Q Guided Resonances Robust to Out-of-plane Scattering
• Ultrasensitive THz sensing with high-Q Fano resonances in metasurfaces
• Lasing action in active dielectric nanoantenna arrays
• Nanophotonic engineering of far-field thermal emitters
• Selection Rules for Quasi-Bound States in the Continuum
• Strong absorption and selective thermal emission from a mid-infrared metamaterial
• Surface bound states in the continuum
• Zero-index bound states in the continuum
• First-Principles Threshold Calculation of Photonic Crystal Surface-Emitting Lasers Using Rigorous Coupled Wave Analysis

Cited by in corpus (1)

• Chiral lasing via broken parity-time symmetry in bound-state-in-the-continuum metasurfaces