  Shortcut to Adiabatic Passage (SHAPE) technique, in the context of coherent
control of atomic systems has gained considerable attention in last few years.
It is primarily because of its ability to manipulate population among the
quantum states infinitely fast compared to the adiabatic processes. Two methods
in this regard have been explored rigorously, namely the transitionless quantum
driving and the Lewis-Reisenfeld invariant approach. We have applied these two
methods to realize SHAPE in adiabatic waveguide coupler. Waveguide couplers are
integral components of photonic circuits, primarily used as switching devices.
Our study shows that with appropriate engineering of the coupling coefficient
and propagation constants of the coupler it is possible to achieve efficient
and complete power switching. We also observed that the coupler length could be
reduced significantly without affecting the coupling efficiency of the system.
