213 citations · 579 across the 17 of their papers we have counts for
18 papers
Correlation functions for quantum dynamics of coupled quasinormal modes and quantum emitters interacting via finite-delay propagating photons
Robert Meiners Fuchs, Juanjuan Ren, Sebastian Franke +2
A time-dependent theory for the interactions between spatially separated lossy cavities in a homogeneous background medium using quantized quasinormal modes (QNMs) is presented. Th…
Dissipation in the Broadband and Ultrastrong Coupling Regimes of Cavity Quantum Electrodynamics: An Ab Initio Quantized Quasinormal Mode Approach
Chris Gustin, Juanjuan Ren, Sebastian Franke +1
Phenomenological approaches to photon loss have long been the workhorse of cavity-QED, but prove inadequate in the presence of sufficiently broadband light-matter interactions. We…
Gain-modified emission dynamics between two quantum emitters in a plasmonic gain cavity system
Becca VanDrunen, Juanjuan Ren, Sebastian Franke +1
We present a general theory of gain-modified emission dynamics between two quantum emitters (two level systems) in a linear gain medium, demonstrating how gain modifies the usual r…
Quantization of optical quasinormal modes for spatially separated cavity systems with finite retardation
Robert Fuchs, Juanjuan Ren, Sebastian Franke +2
A multi-cavity quantization scheme is developed using quasinormal modes (QNMs) of optical cavities embedded in a homogeneous background medium for cases where retardation is signif…
Gain-compensated metal cavity modes and a million-fold improvement of Purcell factors
Becca VanDrunen, Juanjuan Ren, Sebastian Franke +1
Using a rigorous mode theory for gain-compensated plasmonic dimers, we demonstrate how quality factors and Purcell factors can be dramatically increased, improving the quality fact…
Classical Purcell factors and spontaneous emission decay rates in a linear gain medium
Juanjuan Ren, Sebastian Franke, Becca VanDrunen +1
Recently the photonic golden rule, which predicts that the spontaneous emission rate of an atom depends on the projected local density of states (LDOS), was shown to fail in an opt…
Gauge-invariant theory of truncated quantum light-matter interactions in arbitrary media
Chris Gustin, Sebastian Franke, Stephen Hughes
The loss of gauge invariance in models of light-matter interaction which arises from material and photonic space truncation can pose significant challenges to conventional quantum…
Impact of mode regularization for quasinormal mode perturbation theories
Sebastian Franke, Juanjuan Ren, Stephen Hughes
We give insight into the critical problem of an open resonator that is subject to a perturbation outside of its cavity region. We utilize the framework of quasinormal modes (QNMs),…
Quasinormal mode analysis of chiral power flow from linearly polarized dipole emitters coupled to index-modulated microring resonators close to an exceptional point
Juanjuan Ren, Sebastian Franke, Stephen Hughes
Chiral emission can be achieved from a circularly polarized dipole emitter in a nanophotonic structure that possess special polarization properties such as a polarization singulari…
Quantized quasinormal mode theory of coupled lossy and amplifying resonators
Sebastian Franke, Juanjuan Ren, Stephen Hughes
In the presence of arbitrary three-dimensional linear media with material loss and amplification, we present an electromagnetic field quantization scheme for quasinormal modes (QNM…
Connecting classical and quantum mode theories for coupled lossy cavity resonators using quasinormal modes
Juanjuan Ren, Sebastian Franke, Stephen Hughes
We present a quantized quasinormal approach to rigorously describe coupled lossy resonators, and quantify the quantum coupling parameters as a function of distance between the reso…
Fermi's golden rule for spontaneous emission in absorptive and amplifying media
Sebastian Franke, Juanjuan Ren, Marten Richter +2
We demonstrate a fundamental breakdown of the photonic spontaneous emission (SE) formula derived from Fermi's golden rule, in absorptive and amplifying media, where one assumes the…
Quasinormal modes and Purcell factors of coupled loss-gain resonators and index-modulated ring resonators near exceptional points
Juanjuan Ren, Sebastian Franke, Stephen Hughes
We first present a quasinormal mode (QNM) theory for coupled loss-gain resonators working near an exceptional point. Assuming linear media, which can be fully quantified using the…
Fluctuation-dissipation theorem and fundamental photon commutation relations in lossy nanostructures using quasinormal modes
Sebastian Franke, Juanjuan Ren, Stephen Hughes +1
We provide theory and formal insight on the Green function quantization method for absorptive and dispersive spatial-inhomogeneous media in the context of dielectric media. We show…
Quantized quasinormal mode description of non-linear cavity QED effects from coupled resonators with a Fano-like resonance
Sebastian Franke, Marten Richter, Juanjuan Ren +2
We employ a recently developed quantization scheme for quasinormal modes (QNMs) to study a nonperturbative open cavity-QED system consisting of a hybrid metal-dielectric resonator…
Efficient near-field to far-field transformations for quasinormal modes of optical cavities and plasmonic resonators
Juanjuan Ren, Sebastian Franke, Andreas Knorr +2
We describe an efficient near-field to far-field transformation for optical quasinormal modes, which are the dissipative modes of open cavities and plasmonic resonators with comple…
Theory and limits of on-demand single photon sources using plasmonic resonators: a quantized quasinormal mode approach
Stephen Hughes, Sebastian Franke, Chris Gustin +3
Quantum emitters coupled to plasmonic resonators are known to allow enhanced broadband Purcell factors, and such systems have been recently suggested as possible candidates for on-…
Quantization of quasinormal modes for open cavities and plasmonic cavity-QED
Sebastian Franke, Stephen Hughes, Mohsen Kamandar Dezfouli +4
We introduce a second quantization scheme based on quasinormal modes, which are the dissipative modes of leaky optical cavities and plasmonic resonators with complex eigenfrequenci…