We demonstrate a reconfigurable optical bandpass filter based on subwavelength grating
(SWG) waveguide operating in the Bragg reflection regime and integrated with a cavity of …

A highly sensitive and selective CO 2 gas sensor is presented based on a subwavelength
grating (SWG) slot waveguide. Polyhexamethylene biguanide (PHMB) as a functional …

We theoretically propose and experimentally demonstrate a novel ultra-compact four-mode
silicon waveguide crossing device based on the asymmetric directional couplers for densely …

Recently, Subwavelength Grating Waveguides (SWG WG) attract a lot of attention for
sensing applications because it offers better sensitivity than conventional WGs. The …

We design, fabricate, and characterize a compact dual-mode waveguide crossing on a
silicon-on-insulator platform. The dual-mode waveguide crossing with high performance is …

The Luneburg lens is of significant interest for microwave and optical devices due to its wide-
angle focusing properties. However, the inhomogeneous refractive index of the lens is …

Most of the natural materials have very weak interaction with the terahertz (THz)
electromagnetic waves. Designing an absorber in the THz range is of considerable interest …

Absolute instrument refers to a media that can make light rays to propagate in a closed orbit
and perform imaging and self-imaging. In the past few decades, traditional investigations …

The amount of data that needs to be processed is increasing rapidly with the development
and innovation of information technology. Nevertheless, the traditional unidirectional …

A two-dimensional half Maxwell fish-eye lens is compressed using a linear transformation
that maps a half circle to a half ellipse. The focusing property of the lens is preserved while …