Publication | Closed Access

Ultrahigh-<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" altimg="si115.svg" display="inline" id="d1e745"><mml:mi>Q</mml:mi></mml:math> Fano resonance in a cavity-waveguide coupled system based on second-order topological photonic crystals with elliptical holes