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

Silicon photonics is playing a key role in areas as diverse as high-speed optical
communications, neural networks, supercomputing, quantum photonics, and sensing, which …

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 …

Intermodal four-wave mixing (FWM) processes have recently attracted significant interest for
all-optical signal processing applications thanks to the possibility to control the propagation …

Integrated metamaterials are redefining the capabilities of silicon photonic chips. In
providing lithographic control over dielectric permittivity, dispersion and anisotropy, they are …

Mode-division multiplexing has emerged as a promising route for increasing transmission
capacity while maintaining the same level of on-chip integration. Despite the large number …

On-chip mode converters and multiplexers are fundamental components to scale the
capacity of silicon optical interconnects by using different spatial modes of waveguides …

An ultracompact and highly flexible mode-order conversion scheme by exploiting reciprocal
mode transitions is proposed and investigated in detail, where an inverse/asymmetric input …

In this paper, we present the design, optimization, and implementation of a sub-wavelength
grating (SWG) multi-mode interference coupler (MMI) on the silicon nitride photonic …

Tunable phase shifters with wide bandwidth are highly demanded for phased array radar
systems. However, most wideband phase shifters are not tunable, while tunable phase …