The lifetime of quasi-free exciton magnetic polaron in a quantum well with semimagnetic barriers
نویسندگان
چکیده
The calculation of the radiative lifetime of a localized exciton confined in a quantum we11 is performed for CdTe/(Cd.hln)Te structure where the quasi-free exciton magnetic polaron can be formed. There is shown that the polaron induced squeezing of the in-plkne esciton localization radius leads to the increase of the lifetime. The lifetime dependence on the quantum well width is found to be altered by the polaronic effect in very thin CdTe/(Cd,Mn)Te quantum wells.
منابع مشابه
Excitons and Radiation Damage in Alkali Halides
The quantum mechanical description of atomic spectra was the beginning of a new era of quantum physics which today is the theoretical basis of nuclear and solid state physics, chemistry, and biochemistry [1,2]. Quantum mechanics opened also a new look to solid state physics which will be illustrated by the development of the conception of excitons [3]. One of the basic quantum mechanical proble...
متن کاملNeutral and positively charged excitons: A magneto-optical study of a p-doped Cd12xMnxTe quantum well
We present a systematic study of optical transitions in a modulation doped Cd12xMnxTe quantum well with variable concentration of the hole gas. Using a semimagnetic semiconductor as the quantum well material allowed us to control independently the total hole concentration and its distribution between the two spin subbands ~by a small magnetic field!. Therefore, in transmission experiment we ana...
متن کاملVoltage-tunable ferromagnetism in semimagnetic quantum dots with few particles: Magnetic polarons and electrical capacitance
Magnetic semiconductor quantum dots with a few carriers represent an interesting model system where ferromagnetic interactions can be tuned by voltage. By designing the geometry of a doped quantum dot, one can tailor the anisotropic quantum states of magnetic polarons. The strong anisotropy of magnetic polaron states in disklike quantum dots with holes comes from the spin splitting in the valen...
متن کاملLattice exciton-polaron problem by quantum Monte Carlo simulations
Exciton-polaron formation in one-dimensional lattice models with shortor long-range carrier-phonon interaction is studied by quantum Monte Carlo simulations. Depending on the relative sign of electron and hole-phonon coupling, the exciton-polaron size increases or decreases with increasing interaction strength. Quantum phonon fluctuations determine the excitonpolaron size and yield translation-...
متن کاملStatistics of Exciton Emission in a Semiconductor Microcavity: Detuning and Exciton-Exciton Effects
We consider the interaction of quantum light with an ideal semiconductor microcavity. We investigate photon statistics in different conditions and the presence of detuning and exciton-exciton interaction. We show that in the resonant interaction and absence of the exciton-exciton interaction, the state of the whole system can be considered as coherent state. According to our results, it turns...
متن کامل