Search results for "Carrier generation and recombination"

showing 2 items of 2 documents

Relaxation of electron-hole pairs and scintillation mechanism in alkali halide crystals

1997

Abstract The mechanism of the ionizing radiation energy transfer from host lattice to luminescence centers is discussed taking into account the results of the recent experimental investigations of electron-hole pair relaxation in alkali iodide crystals. The high scintillation yield in CsI-Tl, CsI-Na and partially in Nal-Tl crystals is explained by the process of the motion and capture of a one-center self-trapped exciton by impurity ions.

chemistry.chemical_classificationScintillationPhysics::Instrumentation and DetectorsChemistryCarrier generation and recombinationExcitonIodideBiophysicsHalideGeneral ChemistryCondensed Matter PhysicsAlkali metalBiochemistryAtomic and Molecular Physics and OpticsIonizing radiationAtomic physicsLuminescenceJournal of Luminescence
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Acoustic manipulation of electron-hole pairs in GaAs at room temperature

2004

We demonstrate the optically detected long-range (>100 μm) ambipolar transport of photogenerated electrons and holes at room temperature by surface acoustic waves (SAWs) in (In,Ga)As-based quantum well structures coupled to an optical microcavity. We also show the control of the propagation direction of the carriers by a switch composed of orthogonal SAW beams, which can be used as a basic control gate for information processing based on ambipolar transport.

Electron mobilityMaterials sciencePhysics and Astronomy (miscellaneous)Ambipolar diffusionbusiness.industryCarrier generation and recombinationAcoustic waveElectronEnginyeria acústicaCiència dels materialsOptical microcavitylaw.inventionGallium arsenidechemistry.chemical_compoundchemistrylawOptoelectronicsbusinessQuantum well
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