He is a professor at UniversitÃ Paris-Sud in Orsay and scientific director of a laboratory called UnitÃ mixte de recherche . The laboratory is part of the Centre national de la recherche scientifique ( National Scientific Research Centre ) and Thales Group . He is currently professor at UniversitÃ Paris-Sud in Orsay and scientific director of a joint laboratory ( ` UnitÃ mixte de recherche ' ) between the Centre national de la recherche scientifique ( National Scientific Research Centre ) and Thales Group .