Abstract
A theory of the cyclotron-resonance line shape in the presence of hole-phonon interactions in multi-quantum-well structures (MQWS's) has been developed. The cyclotron-resonance linewidth (CRLW) has been calculated using the effective-mass and the elastic-scattering approximations to keep the calculation algebraically simple. We studied the effect of internal strains and found that the CRLW increases with the inclusion of strains. The contributions of the transverse-acoustic (TA) and longitudinal-acoustic phonons on the CRLW have also been studied. It is found that the TA phonons also contribute to the CRLW. This is the opposite situation from the usually studied case of the electron-phonon interaction where the above contribution is zero. The variation of the CRLW with magnetic field, temperature, and the MQWS period has also been investigated. It is found that the CRLW increases with increasing magnetic field and temperature but decreases with increasing MQWS period.
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