Composite structures of resonant dielectric ridges on a dielectric slab waveguide near BICs realize flat-top reflection filters approximating Butterworth responses, with the reflection band made arbitrarily narrow without increasing device size.
Narrow-band grating filters for thin-film optical waveguides,
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2019 1verdicts
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Integrated flat-top reflection filters operating near bound states in the continuum
Composite structures of resonant dielectric ridges on a dielectric slab waveguide near BICs realize flat-top reflection filters approximating Butterworth responses, with the reflection band made arbitrarily narrow without increasing device size.