For nanospheres of gold, Qabs and Qsca were calculated on the basis of Mie theory for homogeneous spheres.64 The Mie total extinction and scattering efficiency Qext and Qsca for a homogeneous sphere are expressed as infinite series:
For nanospheresof gold, Qabs and Qsca were calculated on the basis ofMie theory for homogeneous spheres.64 The Mie total extinctionand scattering efficiency Qext and Qsca for a homogeneous sphereare expressed as infinite series: