Plasmonic Dimers Enhanced Polarized Single Photon Coupled to Optical Nanowire

TL;DR

This paper presents a hybrid plasmonic system that significantly enhances polarized single photon emission into optical nanowires, with potential applications in quantum communication.

Contribution

It introduces a novel plasmonic dimer-nanowire system that boosts emission efficiency and polarization purity of single photons for quantum technologies.

Findings

Purcell factor of 279 achieved

Coupling efficiency of 11%

Degree of polarization up to 99.57%

Abstract

We propose a system for guiding plasmon-enhanced polarized single photons into optical nanowire (ONW) guided modes. It is shown that spontaneous emission properties of quantum emitters (QEs) can be strongly enhanced in the presence of gold nanorod dimer (GNRD) leading to the emission of highly polarized and bright single photons. We have calculated that a high Purcell factor of 279, coupling efficiency of 11 %, and degree of polarization (DOP) of single photons is estimated to be as high as 99.57% in the guided modes of ONW by suitably placing a QE on an optimized location of the GNRD system. This proposed hybrid quantum system can be in-line with fiber networks, opening the door for possible quantum information processing and quantum cryptography applications.