Coupling among closely packed waveguides is a common optical phenomenon, and plays
an important role in optical routing and integration. Unfortunately, this coupling property is …

Photonic topological states have been exploited to give rise to robust optical behaviors that
are quite insensitive to local defects or perturbations, which provide a promising solution for …

We use the method of shortcuts to adiabaticity to design the variable couplings in a three-
waveguide directional coupler which may contain nonlinear elements, in order to …

In this paper, optical simulation of double rapid adiabatic passage (RAP) is investigated in
three evanescently coupled waveguides with longitudinally varying detunings of the …

We propose a method for the robust splitting of light between the two outer waveguides in a
three-waveguide system by mode evolution. Arbitrary power splitting ratio is achieved by …

We investigate the adiabatic evolution of light in nonlinear waveguide couplers via
resonance-locked inverse engineering based on stimulated Raman adiabatic passage …

We propose a method for robust mode conversion between the two outer waveguides in a
three-waveguide coupler based on analogies with quantum population transfer. Depending …

We propose and experimentally demonstrate the broadband power coupling and mode-
order conversion based on the trapezoidal subwavelength grating (SWG) structures. The …

We investigate high-fidelity multiple beam splitting in Hermitian and non-Hermitian (NH)
symmetric coupled waveguides (WGs) with one input and 2 N output WG channels. In …

We examine the use of foundry process optical waveguide couplers in making 1× 2 optical
switches. The concept involves a post-foundry process to provide a moveable dielectric load …