양자우물에 대한 광검출 자기포논 공명

Abstract

In quasi-two-dimensional (Q2D) quantum wells with square and parabolic confinement potentials under the perpendicular and parallel magnetic fields, one-electron normalized eigenfunctions and eigenvalues are investigated. The behaviors of energy dispersion relations, density of states, and chemical potentials of Q2D quantum wells based n-GaAs are showed as functions of magnetic field, temperature, surface electron density, well width, and confinement frequency. Based on quantum linear response theory, the frequency-dependent magnetoconductivities and the relaxation rates in Q2D quantum wells with a square confinement potential and a parabolic confinement potential under the perpendicular magnetic fields are obtained for the Voigt configuration. The optical detected magnetophonon resonance (ODMPR) conditions as functions of photon frequency, confinement frequency, well-width, and magnetic field are also obtained. The behaviors of ODMPR lineshapes according to variation on photon frequency and magnetic field strength, such as the splitting and the shift of resonance peaks, are discussed. The results of this research are compared with the results of previous works for ODMPR conditions and main resonances according to the magnetic field and the incident photon directions.