Quantum-Plasmonic Dynamics Modeled via a Modified Langevin Noise Formalism: Numerical Studies of Single-Photon Emission and Two-Photon Interference

TL;DR

This paper applies a validated quantum formalism to model nanophotonic quantum-plasmonic systems, demonstrating its effectiveness in simulating two-photon interference and atom dynamics for designing single-photon sources and beam splitters.

Contribution

It introduces a comprehensive quantum-mechanical modeling framework for quantum-plasmonic systems, enabling accurate simulations of complex open and dissipative nanophotonic phenomena.

Findings

Numerical modeling of two-photon interference with a plasmonic beam splitter.

Simulation of non-Markovian atom dynamics in plasmonic antennas.

Framework's applicability to quantum photonic device design.

Abstract

Recent studies have established and rigorously validated a modified Langevin noise formalism that enables first-principles quantization of electromagnetic fields in open and dissipative environments [1,2,3]. Building on this foundation, a fully quantum-mechanical multimode Jaynes-Cummings framework has been developed and verified, providing an accurate description of atom--field interactions in lossy and radiative systems [4]. In this work, we explore the potential of this formalism for nanophotonic applications by modeling representative quantum-plasmonic dynamics. In particular, we present detailed numerical examples for (i) two-photon interference mediated by a quantum plasmonic beam splitter, and (ii) non-Markovian dynamics of an atom located in plasmonic antennas and directional control of out-coupled single-photon fields. These results demonstrate that the proposed modeling approach can be directly used to guide the design and optimization of plasmonic single-photon sources and beam-splitting structures. Moreover, the framework is broadly applicable to the analysis of linear optical components and cavity quantum electrodynamics problems in open and dissipative photonic integrated circuits.