Observations of indirect exciton trapping in one- and two-dimensional magnetic lattices

TL;DR

This paper demonstrates a method to create and control magnetic potentials for trapping indirect excitons in coupled quantum wells using magnetic lattices, enabling spatially distributed exciton confinement and tunable trapping mechanisms.

Contribution

It introduces a simple technique for magnetic confinement of indirect excitons using magnetic lattices, with experimental control over trapping via external magnetic fields.

Findings

Localized indirect-excitons observed in magnetic lattices.

Magnetic potentials can be tuned by external magnetic fields.

Magnetic lattices enable controlled exciton trapping.

Abstract

A simple method to create and control magnetic potentials onto coupled quantum wells is demonstrated for indirect-exciton magnetic confinement. Localized inhomogeneous magnetic potentials with periodically distributed local minima and maxima, known as magnetic lattices, are projected into the plane of the coupled quantum wells and used for the spatially distributed two-dimensional indirect-exciton trapping, in which case localized indirect-excitons are observed. The indirect-exciton trapping mechanism is examined by controlling external magnetic field bias resulting in a shift of the localized excitonic lattice.