Zobrazeno 1 - 10
of 67
pro vyhledávání: '"Katsch, Florian"'
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 power, the resonant nonlinearity arising from the two-photon sensitive b
Externí odkaz:
http://arxiv.org/abs/2207.10420
Publikováno v:
Phys. Rev. Lett. 129, 097401 (2022)
Modification of electromagnetic quantum fluctuations in the form of quadrature-squeezing is a central quantum resource, which can be generated from nonlinear optical processes. Such a process is facilitated by coherent two-photon excitation of the st
Externí odkaz:
http://arxiv.org/abs/2203.04567
Autor:
Katsch, Florian, Knorr, Andreas
Publikováno v:
Phys. Rev. B 105, 045301 (2022)
The interaction of optically excited excitons in atomically thin semiconductors with residual doping densities leads to many-body effects which are continuously tunable by external gate voltages. Here, we develop a fully microscopic theory to describ
Externí odkaz:
http://arxiv.org/abs/2201.02164
Doping-induced non-Markovian interference causes excitonic linewidth broadening in monolayer WSe$_2$
Autor:
Katsch, Florian, Knorr, Andreas
Publikováno v:
Phys. Rev. B 105, L041401 (2022)
Strong Coulomb interactions in atomically thin semiconductors like monolayer WSe$_2$ induce not only tightly bound excitons, but also make their optical properties very sensible to doping. By utilizing a microscopic theory based on the excitonic Heis
Externí odkaz:
http://arxiv.org/abs/2201.02161
Autor:
Holler, Johannes, Selig, Malte, Kempf, Michael, Zipfel, Jonas, Nagler, Philipp, Katzer, Manuel, Katsch, Florian, Ballottin, Mariana V., Mitioglu, Anatolie A., Chernikov, Alexey, Christianen, Peter C. M., Schüller, Christian, Knorr, Andreas, Korn, Tobias
Publikováno v:
Phys. Rev. B 105, 085303, 2022
In van der Waals heterostructures (HS) consisting of stacked MoSe$_2$ and WSe$_2$ monolayers, optically bright interlayer excitons (ILE) can be observed when the constituent layers are crystallographically aligned. The symmetry of the monolayers allo
Externí odkaz:
http://arxiv.org/abs/2111.03336
Autor:
Katsch, Florian, Christiansen, Dominik, Schmidt, Robert, de Vasconcellos, Steffen Michaelis, Bratschitsch, Rudolf, Knorr, Andreas, Selig, Malte
Publikováno v:
Phys. Rev. B 102, 115420 (2020)
The recent accessibility of high quality, charge neutral monolayer transition metal dichalcogenides with narrow exciton linewidths at the homogeneous limit provides an ideal platform to study excitonic many-body interactions. In particular, the possi
Externí odkaz:
http://arxiv.org/abs/2009.08918
Publikováno v:
Phys. Rev. Lett. 124, 257402 (2020)
Enhanced Coulomb interactions in monolayer transition metal dichalcogenides cause tightly bound electron-hole pairs (excitons) which dominate their linear and nonlinear optical response. The latter includes bleaching, energy renormalizations, and hig
Externí odkaz:
http://arxiv.org/abs/2006.13783
Autor:
Lorchat, Etienne, Selig, Malte, Katsch, Florian, Yumigeta, Kentaro, Tongay, Sefaattin, Knorr, Andreas, Schneider, Christian, Höfling, Sven
Publikováno v:
Phys. Rev. Lett. 126, 037401 (2021)
Van der Waals heterostructures composed of transition metal dichalcogenide monolayers (TMDs) are characterized by their truly rich excitonic properties which are determined by their structural, geometric and electronic properties: In contrast to pure
Externí odkaz:
http://arxiv.org/abs/2004.12753
Autor:
Trovatello, Chiara, Katsch, Florian, Borys, Nicholas J., Selig, Malte, Yao, Kaiyuan, Borrego-Varillas, Rocio, Scotognella, Francesco, Kriegel, Ilka, Yan, Aiming, Zettl, Alex, Schuck, P. James, Knorr, Andreas, Cerullo, Giulio, Conte, Stefano Dal
The equilibrium and non-equilibrium optical properties of single-layer transition metal dichalcogenides (TMDs) are determined by strongly bound excitons. Exciton relaxation dynamics in TMDs have been extensively studied by time-domain optical spectro
Externí odkaz:
http://arxiv.org/abs/2002.07108
Autor:
Selig, Malte, Katsch, Florian, Brem, Samuel, Mkrtchian, Garnik F., Malic, Ermin, Knorr, Andreas
Publikováno v:
Phys. Rev. Research 2, 023322 (2020)
Monolayers of transition metal dichalcogenides are promising materials for valleytronic applications, since they possess two individually addressable excitonic transitions at the non-equivalent $K$ and $K'$ points with different spins, selectively ex
Externí odkaz:
http://arxiv.org/abs/1908.11178