“…In recent decades, nanophotonics has emerged as a rapidly expanding new field of light-matter interaction, largely owing to recent advances in nanotechnology that permit better control of material properties at the nanometer scale as well as the availability of sophisticated nanophotonic probes. As such, studies based on the new photonic principles have led to the development of artificial materials with negative refractive indices, [10][11][12] nano-optical circuits, 13,14 nanoscale light-emitting sources, 15,16 imaging beyond the diffraction limit [17][18][19] and superresolution optical lithography. 20,21 These studies have laid the physical groundwork for the confinement of light-matter interactions to the nanometer scale, which paves the way toward breaking or circumventing the diffraction barrier and thus increasing storage capacity by using entirely new nanophotonic approaches.…”