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physics.optics2026
Second-Harmonic Generation at a Fourth-Order Exceptional Point Degeneracy
Albert Herrero-Parareda, Domenico de Ceglia, Maria Antonietta Vincenti +3
An anomalous flat-band dispersion provided by a degenerate band edge (DBE) of longitudinal optical modes in a double-grating waveguide is used to enhance second-harmonic generation…
physics.optics2026
Frozen mode in coupled single-mode waveguides with gratings
Albert Herrero-Parareda, Nathaniel Furman, Bradley J. Thompson +3
We present a systematic methodology for designing slow-light photonic integrated circuits with a frozen mode based on a special kind of exceptional point of degeneracy (EPD) of ord…