Beam splitter and combiner based on Bloch oscillations in spatially modulated waveguide arrays

TL;DR

This paper explores how spatially modulated waveguide arrays can manipulate light beams through phenomena like splitting, coalescing, and deflecting, based on Bloch oscillations, offering potential for integrated photonic devices.

Contribution

It introduces a numerical study of light propagation in structured waveguide arrays demonstrating novel beam control mechanisms via Bloch oscillations.

Findings

Light beams can split, coalesce, deflect, and localize in modulated waveguide arrays.

Phenomena are driven by Bloch oscillations.

Potential applications in on-chip beam splitters and combiners.

Abstract

We numerically investigate the light beam propagation in periodic waveguide arrays which are elaborately modulated with certain structures. We find that the light beam may split, coalesce, deflect, and be localized during propagation in these spatially modulated waveguide arrays. All the phenomena originate from Bloch oscillations, and supply possible method for fabricating on-chip beam splitters and beam combiners.