245 citations · 1.4k across the 27 of their papers we have counts for
18 papers · 1 filter
Ultrafast transition from coherent to incoherent polariton nonlinearities in a hybrid 1L-WS2/plasmon structure
Daniel Timmer, Moritz Gittinger, Thomas Quenzel +14
Exciton polaritons based on atomically thin semiconductors are essential building blocks of quantum optoelectronic devices. Their properties are governed by an ultrafast and oscill…
Bichromatic four-wave mixing and quadrature-squeezing from biexcitons in atomically thin semiconductor microcavities
Emil V. Denning, Andreas Knorr, Florian Katsch +1
Nonlinear optical effects such as four-wave mixing and generation of squeezed light are ubiquitous in optical devices and light sources. For new devices operating at low optical po…
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…
Tensor network strategies for calculating biexcitons and trions in monolayer 2D materials beyond the ground state
Sandra C. Kuhn, Marten Richter
Recently in [Phys. Rev. B 99, 241301(R) (2019)] tensor networks build upon logical circuits were briefly introduced to retrieve exciton and biexciton states. Compared to a conventi…
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…
Combined tensor network/cluster expansion method using logic gates: Illustrated for (bi-)excitons by a single layer MoS model system
Sandra Kuhn, Marten Richter
Carriers such as electrons and holes inside the Brillouin zone of complex semiconducting materials can form bound states (excitons, biexcitons etc.). For obtaining the correspondin…
Theory of excitation transfer between two-dimensional semiconductor and molecular layers
Judith Specht, Eike Verdenhalven, Björn Bieniek +3
The geometry-dependent energy transfer rate from an electrically pumped inorganic semiconductor quantum well into an organic molecular layer is studied theoretically. We focus on F…
Nanoplatelets as material system between strong confinement and weak confinement
Marten Richter
Recently, the fabrication of CdSe nanoplatelets became an important research topic. Nanoplatelets are often described as having a similar electronic structure as 2D dimensional qua…
Coherent coupling of individual quantum dots measured with phase-referenced two-dimensional spectroscopy: photon echo versus double quantum coherence
Valentin Delmonte, Judith F. Specht, Tomasz Jakubczyk +7
We employ two-dimensional (2D) coherent, nonlinear spectroscopy to investigate couplings within individual InAs quantum dots (QD) and QD molecules. Swapping pulse ordering in a two…
Dark and bright exciton formation, thermalization, and photoluminescence in monolayer transition metal dichalcogenides
Malte Selig, Gunnar Berghäuser, Marten Richter +3
The remarkably strong Coulomb interaction in atomically thin transition metal dichalcogenides (TMDs) results in an extraordinarily rich many-particle physics including the formatio…
Neutral and Charged Inter-Valley Biexcitons in Monolayer MoSe
Kai Hao, Lixiang Xu, Judith F. Specht +10
In atomically thin transition metal dichalcogenides (TMDs), reduced dielectric screening of the Coulomb interaction leads to strongly correlated many-body states, including exciton…
Trion Formation Dynamics in Monolayer Transition Metal Dichalcogenides
Akshay Singh, Galan Moody, Kha Tran +13
We report charged exciton (trion) formation dynamics in doped monolayer transition metal dichalcogenides (TMDs), specifically molybdenum diselenide (MoSe2), using resonant two-colo…
Numerically exact solution of the many emitter -- cavity laser problem: application to the fully quantized spaser emission
Marten Richter, Michael Gegg, T. Sverre Theuerholz +1
A numerically exact solution to the many emitter -- cavity problem as an open many body system is presented. The solution gives access to the full, nonperturbative density matrix a…
Reconstruction of the wavefunctions of coupled nanoscopic emitters using a coherent optical technique
M. Richter, F. Schlosser, M. Schoth +4
We show that using coherent, spatially resolved spectroscopy, complex hybrid wave functions can be disentangled into the individual wave functions of the individual emitters. This…
Influence of Coulomb correlations on the quantum well intersubband absorption at low temperatures
Thi Uyen-Khanh Dang, Carsten Weber, Marten Richter +1
We present a theory for the intersubband absorption including electronic ground state correlations in a doped GaAs/Al_{35}Ga_{65}As quantum well system. Focusing on the influence o…
Formation dynamics of an entangled photon pair -- a temperature dependent analysis
A. Carmele, F. Milde, M. -R. Dachner +4
We theoretically study the polarization entanglement of photons generated by the biexciton cascade in a GaAs/InAs semiconductor quantum dot (QD), located in a nano cavity. A detail…
Few-photons model of the optical emission of semiconductor quantum dots
Marten Richter, Alexander Carmele, Anna Sitek +1
The Jaynes-Cummings model provides a well established theoretical framework for single electron two level systems in a radiation field. Similar exactly solvable models for semicond…