Multi-phonon transitions in II-VI quantum dot
Ioffe Physico-Technical Institute - 26 Polytechnicheskaya st.
St. Petersburg 194021, Russia
Accepted: 27 December 2000
The intensity of polaron exciton absorption in a spherical quantum dot is calculated. The localized electrons and holes are shown to interact with long-wavelength phonons with wave vectors , R being the radius of the dot. In the case of strong electron-phonon interaction, the polaron effect results in multiple phonon replicas of exciton optical transition. The broadening of different phonon replicas is shown to be less than their separation.
PACS: 71.38.+i – Polarons and electron-phonon interactions / 78.66.-w – Optical properties of specific thin films, surfaces, and low-dimensional structures / 73.20.Dx – Electron states in low-dimensional structures (superlattices, quantum well structures and multilayers)
© EDP Sciences, 2001