Van der Waals-Zeeman Colloquium

Tuesday, 7 Nov 2006, 16:00h

Lattice isotope effects in silicon

Prof. Gordon Davies
Physics Department, King's College London, Strand, London WC2R 2LS, UK

It is only in the last few years that silicon crystals have been available made from single isotopes (28Si, 29Si, or 30Si). In this talk we will explore some of the optical spectroscopy of this new form of silicon. Examples taken are :

In the frequency domain: The effect of changing the isotopes on the zero-point motion of the lattice, and so on the energy of electronic states.

In the time domain: The surprising sensitivity of the lifetimes of vibrational states to the lattice isotopes.