Spectral classification of excitons

Spectral classification of excitons
Credit: Ludwig Maximilian University of Munich

Ultrathin layers of tungsten diselenide have potential applications in opto-electronics and quantum technologies. LMU researchers have now explored how this material interacts with light in the presence of strong magnetic fields.

Owing to their astonishing and versatile properties, atomically thin monolayer and bilayer forms of semiconducting transition metal dichalcogenides have aroused great interest in recent years. Most attention has so far been paid to the optical properties of these materials, such as molybdenum sulfide (MoS) and tungsten diselenide (WSe2). These compounds show great promise as nanoscale elements for applications in opto-electronic and quantum technologies.

In a new study, LMU physicists led by Alexander Högele have now developed a theoretical model, which describes the effects of magnetic fields on the behavior of excitons in two-dimensional ultrathin transition metal dichalcogenides. Excitons are strongly bound quasiparticles, composed of an electron in the conduction band and

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