179 citations · 534 across the 18 of their papers we have counts for
18 papers
Temperature-Induced Crossover of Coherent Phonon Mechanisms in Chiral 2D Perovskites
Katherine A Koch, Matthew P Hautzinger, Matthew C Beard +1
The coupling between electronic excitations and lattice degrees of freedom fundamentally dictates the optoelectronic functionality of hybrid perovskites. While the potential energy…
Biexcitons in Ruddlesden-Popper Metal Halides Probed by Nonlinear Coherent Spectroscopy
Katherine A. Koch, Carlos Silva-Acuña, Ajay Ram Srimath Kandada
Excitons and their correlated complexes underpin the rich photophysics of quantum-confined semiconductors. Among these, biexcitons -- bound states of two electrons and two holes --…
Scattering theory of frequency-entangled biphoton states facilitated by cavity polaritons
Andrei Piryatinski, Nishaant Jacobus, Sameer Dambal +3
The use of quantum light to probe exciton properties in semiconductor and molecular nanostructures typically occurs in the low-intensity regime. A substantial enhancement of excito…
Nonlinear Dynamics in the Formation of Molecular Polariton Condensates
Evan J Kumar, Katherine A Koch, Rishabh Kaurav +5
Exciton-polaritons - hybrid light-matter quasiparticles - can undergo Bose-Einstein-like condensation at elevated temperatures owing to their lower effective mass. This becomes eve…
Lyapunov Dynamics in Entangled Biphoton Spectroscopy
Sameer Dambal, Ajay Ram Srimath Kandada, Eric R. Bittner
We develop a Lyapunov-based framework to model the evolution of entangled biphotons interacting with cavity and material modes. Using Gaussian-preserving dynamics and Møller operat…
Spectroscopic signatures of biexcitons: A case study in Ruddlesden-Popper lead-halides
Katherine A. Koch, Esteban Rojas-Gatjens, Martin Gomez-Dominguez +3
Exciton-exciton interactions are fundamental to the light-emitting properties of semiconductors, influencing applications from lasers to quantum light sources. In this study, we in…
Fine-Tuning Exciton Polaron Characteristics via Lattice Engineering in 2D Hybrid Perovskites
Katherine A Koch, Martin Gomez-Dominguez, Esteban Rojas-Gatjens +4
The layered structure of 2D metal halide perovskites (MHPs) consisting of an ionic metal halide octahedral layer electronically separated by an organic cation, exhibits strong coup…
Resolving exciton and polariton multi-particle correlations in an optical microcavity in the strong coupling regime
Victoria Quirós-Cordero, Esteban Rojas-Gatjens, Martín Gómez-Dominguez +7
Multi-particle correlations of exciton-polaritons and reservoir-excitons in the strong light-matter coupling regime dictate the quantum dynamics of optical microcavities. In this l…
Optical microcavities as platforms for entangled photon spectroscopy
Ravyn Malatesta, Lorenzo Uboldi, Evan J. Kumar +6
Optical microcavities are often proposed as platforms for spectroscopy in the single- and few-photon regime due to strong light-matter coupling. For classical-light spectroscopies,…
The Optical Signatures of Stochastic Processes in Many-Body Exciton Scattering
Hao Li, S. A. Shah, Ajay Ram Srimath Kandada +3
We review our recent quantum stochastic model for spectroscopic lineshapes in the presence of a co-evolving and non-stationary background population of excitations. Starting from a…
Homogeneous optical linewidths in hybrid Ruddlesden-Popper metal halides can only be measured using nonlinear spectroscopy
Ajay Ram Srimath Kandada, Hao Li, Eric R. Bittner +1
The homogeneous photoluminescence spectral linewidth in semiconductors carries a wealth of information on the coupling of primary photoexcitations with their dynamic environment as…
Quantum process tomography of entangled photons as a probe of intermediates of singlet fission in a tetracene derivative
Ajay Ram Srimath Kandada, Ilaria Bargigia, Eric R. Bittner +1
Spin-entaglement has been proposed and extensively used in the case of correlated triplet pairs which are intermediate states in singlet fission process in select organic semicondu…
Lattice vibrations and dynamic disorder in two-dimensional hybrid lead-halide perovskites
Vlad Alexandru Dragomir, Stefanie Neutzner, Claudio Quarti +7
By means of non-resonant Raman spectroscopy and density functional theory calculations, we measure and assign the vibrational spectrum of two distinct two-dimensional lead-iodide p…
Exciton-polaron spectral structures in two dimensional hybrid lead-halide perovskites
Stefanie Neutzner, Félix Thouin, Daniele Cortecchia +3
Owing to both electronic and dielectric confinement effects, two-dimensional organic-inorganic hybrid perovskites sustain strongly bound excitons at room temperature. Here, we demo…
Stable biexcitons in two-dimensional metal-halide perovskites with strong dynamic lattice disorder
Félix Thouin, Stefanie Neutzner, Daniele Cortecchia +8
With strongly bound and stable excitons at room temperature, single-layer, two-dimensional organic-inorganic hybrid perovskites are viable semiconductors for light-emitting quantum…
Probing dynamical symmetry breaking using quantum-entangled photons
Hao Li, Andrei Piryatinski, Jonathan Jerke +3
We present an input/output analysis of photon-correlation experiments whereby a quantum mechanically entangled bi-photon state interacts with a material sample placed in one arm of…
Integrated perovskite lasers on silicon nitride waveguide platform by cost-effective high throughput fabrication
Piotr Jacek Cegielski, Stefanie Neutzner, Caroline Porschatis +8
Metal-halide perovskites are a class of solution processed materials with remarkable optoelectronic properties such as high photoluminescence quantum yields and long carrier lifeti…
Plasmonics in heavily-doped semiconductor nanocrystals
Francesco Scotognella, Giuseppe Della Valle, Ajay Ram Srimath Kandada +6
Heavily-doped semiconductor nanocrystals characterized by a tunable plasmonic band have been gaining increasing attention recently. Herein, we introduce this type of materials focu…