Shortcuts to adiabaticity (STA) are fast routes to the final results of slow, adiabatic changes
of the controlling parameters of a system. The shortcuts are designed by a set of analytical …

Adiabatic processes are ubiquitous in physics and engineering. A drawback of such
processes is that they tend to be slow, either in time–for atomic systems, for example–or in …

A fundamental and intrinsic property of any device or natural system is its relaxation time τ
relax, which is the time it takes to return to equilibrium after the sudden change of a control …

Asymmetric on‐chip light transport is important but always challenging for photonic
integrations. Although it has been recently implemented by adiabatically encircling the …

A short and broadband silicon asymmetric Y-junction two-mode (de) multiplexer is proposed
and simulated. An adiabaticity parameter suitable for high index-contrast silicon waveguides …

In recent years, the concept of shortcuts to adiabaticity (STA), originally developed for
speeding up slow adiabatic state evolution in quantum systems, has found numerous …

We propose an ultrashort and broadband silicon mode-conversion polarization splitter-
rotator (PSR) consisting of a taper and a Y-junction both designed by the fast quasiadiabatic …

Compact silicon mode (de) multiplexers based on asymmetrical directional couplers are
designed using shortcuts to adiabaticity. The coupling coefficient and propagation constants …

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 …

Starting from the fully vectorial coupled local-mode theory, a general design rule for
adiabatic waveguide design is derived. The design rule guarantees adiabaticity and puts an …