  We propose a method to efficiently pump an excited mode of a multimode
optical waveguide starting from a fundamental-mode input by combining
Stark-Chirped Rapid Adiabatic Passage (SCRAP) and Supersymmetry (SUSY)
transformations. In a two-waveguide set, we implement SCRAP by modulating the
core refractive index of one waveguide, which is evanescently coupled to its
SUSY partner. SCRAP provides an efficient transfer of light intensity between
the modes of different waveguides, while SUSY allows to control which modes are
supported. Using both techniques allows to achieve fidelities above 99% for the
pumping of the excited mode of a two-mode waveguide. Additionally, we show that
SCRAP can be exploited to spatially separate superpositions of fundamental and
excited modes, and how SUSY can also improve the results for this application.
