Meier, Cedrik; Lüttjohann, Stephan; Offer, Matthias; Wiggers, Hartmut; Lorke, Axel:
Silicon Nanoparticles: Excitonic Fine Structure and Oscillator Strength
2009
In: Advances in Solid State Physics, Band 48 (2009), S. 79 - 90
Artikel/Aufsatz in Zeitschrift2009MaschinenbauPhysik
Fakultät für Physik » Experimentalphysik
Titel:
Silicon Nanoparticles: Excitonic Fine Structure and Oscillator Strength
Autor(in):
Meier, CedrikLSF; Lüttjohann, Stephan; Offer, Matthias; Wiggers, HartmutLSF; Lorke, AxelLSF
Erscheinungsjahr
2009

Abstract:

In this review, recent results on optical spectroscopy on silicon nanoparticles are summarized. We will demonstrate the quantum size effect observed in the photoluminescence for nanoparticles with diameters below $10 nm$. Moreover, the excitonic fine structure splitting caused by the exchange interaction is investigated using time-resolved and magnetic-field-dependent photoluminescence measurements. From these results, it is possible to estimate the rate of non-radiative recombinations in these nanoparticles, which allows to determine the oscillator strength and the quantum yield independently.