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physics.optics2026
Scatter-free perfect reflection in multichannel monolithic high-contrast gratings: direct--indirect Fourier-harmonic interference and dimensionality of the solution set
Sun-Goo Lee, Wook-Jae Lee
Monolithic high-contrast gratings (MHCGs) can exhibit scatter-free perfect reflection despite open higher-order substrate diffraction channels, but the underlying mechanism has not…
physics.optics2026
Bound States in the Continuum and Unidirectional Guided Resonances Enabled by Competing Fourier Harmonics near the Fourth Stop Band
Sun-Goo Lee, Wook-Jae Lee
Bound states in the continuum (BICs) and unidirectional guided resonances (UGRs) are singular radiative eigenstates in planar photonic lattices characterized by complete or directi…