Polychromatic Optical Bloch Oscillations

TL;DR

This paper demonstrates that inserting lumped phase slips in curved optical waveguide arrays can restore self-imaging and enable approximate Bloch oscillations over broad spectral ranges, overcoming wavelength dependence issues.

Contribution

It introduces a novel method of inserting lumped phase slips to achieve broadband Bloch oscillations in polychromatic optical waveguide arrays.

Findings

Restoration of self-imaging in polychromatic beams.

Approximate Bloch oscillations over broad spectral ranges.

Effective phase slip technique for waveguide array control.

Abstract

Bloch oscillations (BOs) of polychromatic beams in circularly-curved optical waveguide arrays are smeared out owing to the dependence of the BO spatial period on wavelength. Here it is shown that restoring of the self-imaging property of the array and approximate BOs over relatively broad spectral ranges can be achieved by insertion of suitable lumped phase slips uniformly applied across the array.