Devices Using Dressed Photons

Motoichi Ohtsu, Tadashi Kawazoe, Takashi Yatsui +1 more

Motoichi Ohtsu

Ohtsu

Motoichi Ohtsu

Nanophotonics is defined, and a physical picture of dressed photons is presented. Room-temperature nanophotonic logic gates and related devices are demonstrated. An application for an optical router system is also reviewed.

Motoichi Ohtsu

Hirofumi Sakuma, Izumi Ojima, Motoichi Ohtsu

This article reviews recent progress in theoretical studies of dressed photons. For providing concrete physical images of dressed photons, several experimental studies are demonstrated. They are applications of dressed photons to novel optical functional devices, nano-fabrication technologies, energy conversion technologies, and photon breeding devices. After these experimental demonstrations, as the main part of this review, quantum-field theoretical formulation of dressed photons is attempted in use of the newly introduced Clebsch-dual variable of electromagnetic field. The reason for introducing the new formulation will be explained in the final section from the viewpoint to exhibit the contrast between free and interacting quantum fields in regard to their energy-momentum supports which are seldom touched upon (or forgotten) in the common physical discussions about quantum fields.