Meier, Cedrik; Lüttjohann, Stephan; Offer, Matthias; Wiggers, Hartmut; Lorke, Axel:

Silicon Nanoparticles: Excitonic Fine Structure and Oscillator Strength

In: Advances in Solid State Physics, Jg. 48 (2009), S. 79 - 90
Zeitschriftenaufsatz / Fach: Maschinenbau; Physik
Fakultät für Physik » Experimentalphysik
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.