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Laboratoire Pierre Aigrain

Accueil du site > Séminaires > 2009 > Séminaire - 9 février 2009

Séminaire - 9 février 2009

Terahertz spectroscopy of charge carrier dynamics at nanoscale interfaces

Dr Michael Johnston, Clarendon Laboratory, University of Oxford, UK

Measuring the electrical properties of semiconductor nanostructures is often difficult and unreliable owing to the complexity of forming suitable contacts to these materials. Terahertz radiation may be utilised as a convenient non-contact probe of a material’s AC conductivity, thereby removing the need to form contacts. In this seminar I will provide an introduction to THz AC conductivity measurements and present our latest results on the electrical properties of III-V nanowires, InP honeycomb structures, charge ordered nickelates, polymer-fullerene blends and quantum cascade lasers.