Portal de Periódicos da CAPES

The Phonon-Assisted Radiative Recombination of Excitons Confined in InAs Quantum Dashes

2013; Polish Academy of Sciences; Volume: 124; Issue: 5 Linguagem: Inglês

10.12693/aphyspola.124.813

1898-794X

Łukasz Dusanowski, Anna Musiał, G. Sȩk, Paweł Machnikowski,

Laser-Matter Interactions and Applications

In this report we have investigated theoretically the phonon-assisted recombination process of excitons conned in strongly elongated semiconductor nanostructures, called quantum dashes.Interaction with phonon bath leads to the occurrence of phonon-assisted recombination, which in the case of acoustic phonons is manifested in the optical spectra as a deviation of the homogeneously broadened emission line shape from expected Lorentzian prole via occurrence of the so-called phonon sidebands.Hereby, we have modeled the inuence of the quantum dash geometry on this spectral feature proving pronounced suppression of phonon-induced decoherence for strongly elongated nanostructures.Furthermore, the importance of dierent phonon coupling mechanisms has been evaluated and the spectral diusion eects, unavoidable in the time-integrated photoluminescence experiments, have been accounted for.