Recombination of many-particle states in InAs self-organized quantum dots

Recombination of many-particle states in InAs self-organized quantum dots

Strong many-body effects have been observed in the time-resolved photoluminescence spectroscopy of self-organized InAs/GaAs quantum dots. Our results show that the effects generate a considerable bandgap renormalization, being 28 meV at a dot occupancy of 20 electron-hole pairs for the lowest transi...

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Autors principals: Yuan, Z, Foo, E, Ryan, J, Mowbray, D, Skolnick, MS, Hopkinson, M
Format: Conference item
Publicat: 2001
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Sumari:Strong many-body effects have been observed in the time-resolved photoluminescence spectroscopy of self-organized InAs/GaAs quantum dots. Our results show that the effects generate a considerable bandgap renormalization, being 28 meV at a dot occupancy of 20 electron-hole pairs for the lowest transition. Tt is also found that many-particle state scattering gives rise to a large homogeneous broadening of the photoluminescence peak, from which we estimate the intradot relaxation time to be 300 B. The fast intradot relaxation is supported by time-resolved measurements with direct excitation.

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