Classical and quantum effects in noble metal and graphene plasmonics

Plasmonics - the interaction of light with free electrons in metals - is commonly understood within classical electrodynamics using local-response constitutive laws (such as Ohm´s law). However, the tight localization of plasmons to small volumes is revealing intriguing new physics such as nonclassical electrodynamics with a nonlocal response of the plasmons. Nonlocal effects are being explored both theoretically and experimentally in different charge-conducting material systems with examples ranging from sub-10 nanometer noble metal particles to one-atom thin disks of doped graphene.