title: Engineering of fast mode conversion in multimode waveguides.
abstract: We propose fast and robust mode conversion in multimode waveguides based on Lewis-Riesenfeld invariant theory. The design of mode converters using the multimode driving for dynamical invariant is discussed. Computer-generated planar holograms are used to mimic the shaped pulses driving the states in three-level quantum systems. We show that the invariant-based inverse engineering scheme reduces mode converter length as compared to the common adiabatic scheme.
authors.affiliation: Department of Photonics, National Cheng Kung University, Tainan 701, Taiwan. tsengsy@mail.ncku.edu.tw
authors.forename: Shuo-Yen
authors.initials: SY
authors.lastname: Tseng
authors.forename: Xi
authors.initials: X
authors.lastname: Chen