Compact beam splitters in coupled waveguides using shortcuts to adiabaticity

Xi Chen, Rui Dan Wen, Jie Long Shi, Shuo Yen Tseng

Research output: Contribution to journalArticlepeer-review

7 Citations (Scopus)


There are various works on adiabatic (three) waveguide coupler devices but most are focused on the quantum optical analogies and the physics itself. We successfully apply shortcuts to adiabaticity techniques to the coupled waveguide system with a suitable length for integrated optics devices. Especially, the counter-diabatic driving protocol followed by unitary transformation overcomes the previously unrealistic implemention, and is used to design feasible and robust 1 ×2 and 1 ×3 beam splitters for symmetric and asymmetric three waveguide couplers. Numerical simulations with the beam propagation method demonstrate that these shortcut designs for beam splitters are shorter than the adiabatic ones, and also have a better tolerance than parallel waveguides resonant beam splitters with respect to spacing errors and wavelength variation.

Original languageEnglish
Article number045804
JournalJournal of Optics (United Kingdom)
Issue number4
Publication statusPublished - 2018 Apr

All Science Journal Classification (ASJC) codes

  • Electronic, Optical and Magnetic Materials
  • Atomic and Molecular Physics, and Optics

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