Lorentz-Drude dipoles in the radiative limit and their modeling in finite-difference time-domain methods

Abstract

The Lorentz-Drude model for electric dipoles is a classical framework widely used in the study of dipole dynamics and light-matter interactions. Here we focus on the behaviors of Lorentz-Drude dipoles when their radiative rate dominates their energy loss. We show that dipole radiation losses do not count toward phenomenological dipole losses if the driving field is interpreted as the total field at the dipole. In particular, if the dipole does not contain non-radiative losses, then the Lorentz-Drude damping term should be removed. This is verified by self-consistent implementations of point dipoles in finite-difference time-domain simulations, which also provide a method to directly compute the transport properties of light when dipoles are present.

arXiv comment24 pages, 3 figures

References in corpus (11)

• Interfacing single photons and single quantum dots with photonic nanostructures
• A single-photon transistor using nano-scale surface plasmons
• Resonance fluorescence from a coherently driven semiconductor quantum dot in a cavity
• Efficient coupling of photons to a single molecule and the observation of its resonance fluorescence
• Cooperative resonances in light scattering from two-dimensional atomic arrays
• A subradiant optical mirror formed by a single structured atomic layer
• Enhanced optical cross section via collective coupling of atomic dipoles in a 2D array
• Perfect Reflection of Light by an Oscillating Dipole
• From Lorenz to Coulomb and other explicit gauge transformations
• Perfect excitation of a matter qubit by a single photon in free space
• Measuring the quantum efficiency of single radiating dipoles using a scanning mirror