Zhong-Hua Shen

Multimode control of quasi-bound states in the continuum through symmetry engineered multipolar diversity

We present a dimeric all dielectric metasurface that enables multimode refractive-index sensing via symmetry-engineered quasi-bound states in the continuum. A single rotation of one silicon pillar breaks the C2v symmetry and simultaneously activates four spectrally isolated resonances as electric quadrupole, magnetic d...