Abstract
This article reports studies on the interaction between evanescent fi elds and nanostructures. The recent development of nanofabrication technologies enables the realizition of metallic structures that generate strongly localized electric fields with a steep gradient in the nanometer scale. If such a gradient is remarkable, the usual long wavelength approximation (LWA) is violated even for a single molecule, and hence, a dipole forbidden transition occurs. We theoretically demonstrate such peculiar molecularexcitation control using metallic nano-antennas for dimer and pentamer molecules by considering the microscopic nonlocal and self-consistent responses of molecules.
