Optical Method for Determination of Carrier Density in Modulation Doped Quantum Wells
arXiv:cond-mat/0111593 · doi:10.1103/PhysRevB.65.115310
Abstract
An optical method is suggested to determine the concentration of two-dimensional electrons in modulation-doped quantum wells at low and moderate electron densities between 10^{9} and 2x10^{11} cm^{-2}. The method is based on an analysis of magneto-reflectivity spectra of charged excitons (trions). The circular polarization degree and the oscillator strength of the charged excitons contain information about the density and spin polarization of two-dimensional electron gas. The method is applied to CdTe/(Cd,Mg)Te and ZnSe/Zn,Mg)(S,Se) heterostructures.
Cited by in corpus (19)
- Enabling valley selective exciton scattering in monolayer WSe through upconversion
- Optical properties of charged excitons in two-dimensional semiconductors
- Binding Energy of Charged Excitons in ZnSe-based Quantum Wells
- Spin coherence of a two-dimensional electron gas induced by resonant excitation of trions and excitons in CdTe/(Cd,Mg)Te quantum wells
- Exciton-Trion Coherent Interactions in a CdTe/CdMgTe Quantum Well
- Coherent spin dynamics of electrons and excitons in nanostructures
- Dark trions govern the temperature-dependent optical absorption and emission of doped atomically thin semiconductors
- The interplay between excitons and trions in a monolayer of MoSe
- Definitive observation of the dark triplet ground state of charged excitons in high magnetic fields
- Spin-flip Raman scattering of the neutral and charged excitons confined in a CdTe/(Cd,Mg)Te quantum well
- Time-resolved and continuous-wave optical spin pumping of semiconductor quantum wells
- Optical spin pumping of modulation doped electrons probed by a two-color Kerr rotation technique
- Optical control of electron spin coherence in CdTe/(Cd,Mg)Te quantum wells
- Photoluminescence of p-doped quantum wells with strong spin splitting
- Measuring the spin polarization and Zeeman energy of a spin-polarized electron gas: Comparison between Raman scattering and photoluminescence
- Nanosecond-scale magneto-exciton energy oscillations in quantum wells
- Magneto-optics of two-dimensional electron gases modified by strong Coulomb interactions in ZnSe quantum wells
- Single beam detection of optically driven spin dynamics in CdTe/(Cd,Mg)Te quantum wells
- Inverse exciton spin orientation due to trion formation in modulation doped quantum wells