Digital Waveguide Adiabatic Passage Part 1: Theory

TL;DR

This paper introduces a digital approach to spatial adiabatic passage in integrated photonics, demonstrating robust device designs despite digitization, which could lead to innovative photonic applications.

Contribution

It presents a novel digital waveguide separation method for adiabatic passage, expanding design possibilities and robustness in integrated photonic devices.

Findings

Robustness against wavelength and refractive index variations

Successful modeling of digitally varied waveguide separations

Potential for new photonic device designs

Abstract

Spatial adiabatic passage represents a new way to design integrated photonic devices. In conventional adiabatic passage designs require smoothly varying waveguide separations. Here we show modelling of adiabatic passage devices where the waveguide separation is varied digitally. Despite digitisation, our designs show robustness against variations in the input wavelength and refractive index contrast of the waveguides relative to the cladding. This approach to spatial adiabatic passage opens new design strategies and hence the potential for new photonics devices.