Angular Dependence of Optically Detected Magnetophonon Resonances in Miniband Transport in Semiconductor Superlattice under Tilted Magnetic Fields

Abstract

The angular dependence of the optically detected magnetophonon resonance (ODMPR) for the frequency-dependent magnetoconductivity in a Ge-based (nonpolar) semiconductor superlattice under a tilted magnetic field is investigated. The frequency-dependent magnetoconductivity, including the miniband width, the periodic potential, the photon frequency, and the tilt angle of a magnetic field tilted relative to the superlattice axis, is calculated using the nonpolar LO phonon modes as a function of the magnetic field strengths. In particular, the angular dependence of the ODMPR lineshape, such as the splitting and the shift of the ODMPR peaks for the photon frequency, is discussed. Furthermore, the angular dependences for the appearance of the plateau region between two neighboring ODMPR peaks and the change in the ODMPR amplitude as a function of the tilt angle of the tilted magnetic field for various miniband widths and photon frequencies are discussed in detail.