Tunable narrow band source via the strong coupling between optical emitter and nanowire surface plasmons

Abstract

The spectrum width can be narrowed to a certain degree by decreasing the coupling strength for the two-level emitter coupled to the propagating surface plasmon. But the width can not be narrowed any further because of the loss of the photon out of system by spontaneous emission from the emitter. Here we propose a new scheme to construct a narrow-band source via a one-dimensional waveguide coupling with a three-level emitter. It is shown that the reflective spectrum width can be narrowed avoiding the impact of the loss. This approach opens up the possibility of plasmonic ultranarrow single-photon source.

References in corpus (5)

• Theory of single-photon transport in a single-mode waveguide coupled to a cavity containing a two-level atom
• Strong coupling of single emitters to surface plasmons
• Controlled coupling of a single nitrogen-vacancy center to a silver nanowire
• Robust-fidelity atom-photon entangling gates in the weak-coupling regime
• Precise measurement of hyperfine intervals using avoided crossing of dressed states