Monolayer (1L) semiconducting transition metal dichacogenides (TMDs) possess
remarkable physical and optical properties, promising for a wide range of applications from …

Raman scattering and photoluminescence (PL) emission are used to investigate a single
layer of tungsten disulfide (WS 2) obtained by exfoliating n-type bulk crystals. Direct gap …

The emission and absorption spectra of quantum wells containing electron or hole gas are
reviewed. We show that trions, also known as charged excitons, play a dominant role in …

Electron-trion photoluminescence spectra were measured in undoped high-quality GaAs
quantum wells. The obtained line shape depends on temperature and is asymmetric with a …

A consistent density‐matrix approach for the absorption spectra of semiconductor
nanostructures at finite carrier densities is presented that describes both bound and …

Excitons and charged excitons (trions) are investigated in ZnSe-based quantum well
structures with (Zn, Be, Mg) Se and (Zn, Mg)(S, Se) barriers by means of magneto-optical …

A theory of charged excitons X− in a dilute two-dimensional (2D) electron gas in a high-
magnetic field is presented. In contrast to previous calculations, three bound X− states (one …

We report on the observation of photoluminescence from positive, neutral, and negative
charge states of single semiconductor quantum dots. For this purpose we designed a …

We compare binding energies for positive and negative trions in a series of narrow GaAs
quantum wells and in “natural” quantum dots defined by quantum well thickness fluctuations …

We report on the optical manipulation of the electron spin relaxation time in a GaAs-based
heterostructure. Experimental and theoretical study shows that the average electron spin …