Green function approach to scattering of nonclassical light by bounded media

TL;DR

This paper introduces a Green function-based method to describe the propagation and scattering of various nonclassical light states in structured media, overcoming limitations of previous approaches.

Contribution

It develops a comprehensive Green function framework for nonclassical light scattering in bounded media, applicable to diverse quantum states and experimental configurations.

Findings

Successfully describes nonclassical light propagation using Green functions.

Provides explicit Green functions for Fock, Glauber, and squeezed states.

Models scattering at slabs with Poynting energy flow vector.

Abstract

We show that using the properties of the photon Green's function one can successfully describe the propagation of arbitrary nonclassical optical radiation through structured materials. In contrast to the similar input-output approach, our method is not restricted neither to the spatial homogeneous matter nor to the specific direction of light beam incidence or outcoupling. Several quantum states of light are addressed in detail, such as Fock, Glauber, and different squeezed light states, and their Green functions are given. Furthermore, it is demonstrated how scattering of light at a slab can be described with Poynting's energy flow vector, and how experimental setups can be modeled.