Metasurfaces are ushering in an era of multifunctional control over optical wavefronts
realized with ultrathin planarized devices. Recent advances have been enabling …

We introduce a tunable narrow-band-stop frequency filter based on twisted bilayer photonic
crystal slabs. The operation of the filter is based on the guided resonance of the slabs. We …

Localized light matter interaction at a resonant nanostructure facilitates spectrally selective
transmission of light, which has led to demonstrations of ultrathin metasurface based optical …

We experimentally demonstrate tunable guided resonance in twisted bilayer photonic
crystals. Both the numerically and the experimentally obtained transmission spectra feature …

We describe RCWA4D, an electromagnetic solver for layered structures with
incommensurate periodicities. Our method is based on an extension of the rigorous coupled …

Subwavelength dielectric gratings based on guided mode resonances (GMRs) provide a
compact, low-cost, and readily fabricable platform for narrowband spectral filters applied in …

The challenge of obtaining transmission spectra with both a wider tunable spectral range
and high resolution persists. In this paper, a novel all-dielectric transmissive grating structure …

Here, we propose a metagrating structure for dual-and narrow-band optical filtering and
sensing in the VIS-NIR regime, comprising two closely spaced, optically thin layers of …

In photonic biosensor designs, the phase-detection methods offer better sensing capabilities
and lower detection limits in contrast to other conventional interrogation schemes. However …

The optical coupler can couple the light from the fiber into the waveguide, and the
wavelength demultiplexer can split light into different wavelengths. Both devices play a …