Spatiotemporal dynamics of quantum-well excitons

Spatiotemporal dynamics of excitons in monolayer and bulk WS2.

Spatiotemporal dynamics of excitons in monolayer and bulk WS2 at room temperature is studied by transient absorption microscopy in the reflection geometry. Excitons are formed from photocarriers injected by a tightly focused 390 nm pump pulse, and monitored by detecting different reflection of a time-delayed and spatially scanned 620 nm probe pulse. We obtain exciton lifetimes of 22 ± 1 and 110...

Theory of Quantum Well Excitons in Electric and Magnetic Fields

The effects of external electric and magnetic fields on excitons in GaAsIAlGaAs quantum wells have been calculated in the effective mass approximation. Recent experiments by Viiia et al. which identify exciton couplings induced by an electric field are satisfactorily explained by the effects of valence band mixing. The properties of magneto-excitons in quantum wells are also found to be charact...

Diamagnetic Shifts of Quantum Well Excitons in Strong Magnetic Fields Applied in the Well Planes

Dynamics of localized excitons in InGaN/GaN quantum wells

circuit modeling of quantum well heterostructure biopolar phototransistor مدل سازی مداری qw-hbpt

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