Time-resolved and continuous-wave optical spin pumping of semiconductor quantum wells

Abstract

Experimental and theoretical studies of all-optical spin pump and probe of resident electrons in CdTe/(Cd,Mg)Te semiconductor quantum wells are reported. A two-color Hanle-MOKE technique (based on continuous-wave excitation) and time-resolved Kerr rotation in the regime of resonant spin amplification (based on pulsed excitation) provide a complementary measure of electron spin relaxation time. Influence of electron localization on long-lived spin coherence is examined by means of spectral and temperature dependencies. Various scenarios of spin polarization generation (via the trion and exciton states) are analyzed and difference between continuous-wave and pulsed excitations is considered. Effects related to inhomogeneous distribution of $g$-factor and anisotropic spin relaxation time on measured quantities are discussed.

26 pages, 19 figures, submitted to special issue on Optical Orientation of Semiconductor Science and Technology

References in corpus (10)

• Imaging spin flows in semiconductors subject to electric, magnetic, and strain fields
• Near-field spectroscopy of a gated electron gas: a direct evidence for electrons localization
• Spin coherence of a two-dimensional electron gas induced by resonant excitation of trions and excitons in CdTe/(Cd,Mg)Te quantum wells
• Observation of Spin Relaxation Anisotropy in Semiconductor Quantum Wells
• Optical orientation of electron spins in GaAs quantum wells
• Spin accumulation in forward-biased MnAs/GaAs Schottky diodes
• Optical Method for Determination of Carrier Density in Modulation Doped Quantum Wells
• Definitive observation of the dark triplet ground state of charged excitons in high magnetic fields
• Optical spin pumping of modulation doped electrons probed by a two-color Kerr rotation technique
• Exciton spin decay modified by strong electron-hole exchange interaction

Cited by in corpus (18)

• Pump-Probe Faraday Rotation and Ellipticity in an Ensemble of Singly Charged Quantum Dots
• Spin noise spectroscopy of a single-quantum-well microcavity
• Coherent spin dynamics of electrons and excitons in nanostructures
• Coherent spin dynamics of electrons and holes in semiconductor quantum wells and quantum dots under periodical optical excitation: resonant spin amplification versus spin mode-locking
• Longitudinal and transversal spin dynamics of donor-bound electrons in fluorine-doped ZnSe: spin inertia versus Hanle effect
• Anisotropic spin relaxation revealed by resonant spin amplification in (110) GaAs quantum wells
• All-optical NMR in semiconductors provided by resonant cooling of nuclear spins interacting with electrons in the resonant spin amplification regime
• Optical control of electron spin coherence in CdTe/(Cd,Mg)Te quantum wells
• Theory of Electron Spin Relaxation in n-Doped Quantum Wells
• Large anisotropic spin relaxation time of exciton bound to donor states in triple quantum wells
• DC spin generation by junctions with AC driven spin-orbit interaction
• Single beam detection of optically driven spin dynamics in CdTe/(Cd,Mg)Te quantum wells
• Magnetic field-induced exchange effects between Mn ions and free carriers in ZnSe quantum well through the intermediate nonmagnetic barrier studied by photoluminescence
• Spin relaxation of localized electrons in monolayer MoSe${}_2$: importance of random effective magnetic fields
• Single-beam resonant spin amplification of electrons interacting with nuclei in a GaAs/(Al,Ga)As quantum well
• Interaction between Mn Ions and Free Carriers in Quantum Wells with Asymmetrical Semimagnetic Barriers
• Nuclear spin dynamics influenced and detected by electron spin polarization in CdTe/CdMgTe quantum wells
• The role of excitons and trions on electron spin polarization in quantum wells