The growing maturity of nanofabrication has ushered massive sophisticated optical
structures available on a photonic chip. The integration of subwavelength-structured …

Silicon photonics has attracted tremendous interest from academia and industry, as the
fabrication of the silicon family of photonic devices is mostly compatible with the …

In recent years, optical modulators, photodetectors,(de) multiplexers, and heterogeneously
integrated lasers based on silicon optical platforms have been verified. The performance of …

A Luneburg lens with a gradient index distribution is an aberration-free and coma-free
spherical lens. It has wide applications ranging from invisibility cloaks, illusion optics, and …

There is a growing interest in structured light, especially orbital angular momentum (OAM)
beams, due to its unique amplitude and phase structure. Multiple orthogonal OAM beams …

On-chip mode-manipulation is one of the most important physical fundamentals for many
photonic integrated devices and circuits. In the past years, great progresses have been …

A high-performance silicon-based polarizing beam splitter (PBS) is proposed and
demonstrated experimentally by using an improved structure with cascaded bent directional …

An ultra-broadband polarization beam splitter (PBS) with low excess loss (EL) and a high
extinction ratio (ER) is proposed and demonstrated for the case with 340 nm thick silicon-on …

Mode-division multiplexing (MDM) technology has drawn tremendous attention for its ability
to expand the link capacity within a single-wavelength carrier, paving the way for large-scale …

Grating‐assisted contra‐directional couplers are important optical components in photonic
integrated circuits (PICs), which can serve as fundamental building blocks for optical (de) …