ABSTRACT: We present a novel approach to designing high-quality bound states in
the continuum (BIC) in dielectric meta-surfaces using magnetic dipole resonances
coupled to a mirror, enabling strong light–matter interaction without the need for
asymmetric geometry or polarization dependence. This simplifies fabrication and
enhances practical applications, demonstrated by a record-breaking third
harmonic generation efficiency. Additionally, we showcase superior modulation
characteristics with a pulsewidth-limited switching time of 100 fs and a remarkably
low energy consumption, facilitated by the narrow photonic resonance of our
meta-surface. Our findings offer significant potential for optical sensing, quantum
photonics, and nonlinear devices.

BIO: Dr. Hayk Harutyunyan is an Associate Professor of Physics at Emory University,
specializing in ultrafast and nonlinear optics with a focus on nanophotonic systems
and metamaterials. Before joining Emory in 2014, he completed his Ph.D. at the
University of Pisa, Italy, and held postdoctoral positions at the University of
Rochester and Argonne National Laboratory.