Enhancement of single-photon emission rate by plasmon induced transparency in metal-insulator-metal waveguides

In this paper, we propose a structure that realizes the plasmon induced transparency (PIT) effect through metal-insulator-metal waveguide and T-shaped resonator. PIT is a quantum interference effect, which can lead to a sharp transparency window in the wide absorption spectrum. By changing the coupling strength between the light and dark states of PIT effect, the distribution of electromagnetic field around the quantum-dot nanowire can be affected. Theoretical analysis showed the Purcell effect caused by the T-shaped resonator increases the emission rate of quantum dots by nearly 900 times. This ultrafast single-photon source has great potential in quantum communication and optical interconnection.