29 citations · 100 across the 19 of their papers we have counts for
20 papers
Development of High-Quality Polymer/Air-Bragg Micromirror Structures for Nanophotonic Applications
Chirag Chandrakant Palekar, Manan Shah, Stephan Reitzenstein +1
We report the design, nanofabrication, and characterization of high-quality polymer-based micromirror structures employing the 3D two-photon polymerization lithography technique. C…
Radiative Pattern of Intralayer and Interlayer Excitons in Two-Dimensional WS2/WSe2 Heterostructure
Mohammed Adel Aly, Manan Shah, Lorenz Maximilian Schneider +4
Two-dimensional (2D) heterostructures (HS) formed by transition-metal dichalcogenide (TMDC) monolayers offer a unique platform for the study of intralayer and interlayer excitons a…
Machine Learning-Based Optimization of Chiral Photonic Nanostructures: Evolution- and Neural Network-Based Design
Oliver Mey, Arash Rahimi-Iman
Chiral photonics opens new pathways to manipulate light-matter interactions and tailor the optical response of meta-surfaces and -materials by nanostructuring nontrivial patterns.…
Probing the ultrafast gain and refractive index dynamics of a VECSEL
Christian Kriso, Tim Bergmeier, Nathan Giannini +9
Typically, strong gain saturation and gain dynamics play a crucial role in semiconductor laser mode-locking. While there have been several investigations of the ultrafast gain dyna…
Tunable Polymer/Air Bragg Optical Microcavity Configurations for Controllable Light-Matter Interaction Scenarios
Chirag Chandrakant Palekar, Arash Rahimi-Iman
Complex optical systems such as high-quality microcavities enabled by advanced lithography and processing techniques paved the way to various light-matter interactions (LMI) studie…
Two-chip power-scalable THz-generating semiconductor disk laser
Heyang Guoyu, Christian Kriso, Fan Zhang +4
We demonstrate a compact two-chip terahertz-emitting vertical-external-cavity surface-emitting laser (TECSEL) source, which provides 1-THz output based on intracavity frequency con…
Frequency-modulated comb in a VECSEL
Christian Kriso, Avijit Barua, Obaid Mohiuddin +5
Optical frequency combs based on mode-locked lasers have revolutionized many areas of science and technology, such as precision metrology, optical frequency synthesis or telecommun…
Optical Measurement of Pseudo-Spin Texture of the Exciton Fine-Structure in Monolayer WSe2 within the Light Cone
Lorenz Maximilian Schneider, Shanece Esdaille, Daniel Rhodes +3
Several theoretical predictions have claimed that the neutral exciton of TMDCs splits into a transversal and longitudinal exciton branch, with the longitudinal one, which is the up…
Direct Measurement of the Radiative Pattern of Bright and Dark Excitons and Exciton Complexes in Encapsulated Tungsten Diselenide
Lorenz Maximilian Schneider, Shanece Esdaille, Daniel Rhodes +3
The optical properties of particularly the tungsten-based transition-metal dichalcogenides are strongly influenced by the presence of dark excitons. Recently, theoretical predictio…
Continuously-tunable light-matter coupling in optical microcavities with 2D semiconductors
Franziska Wall, Oliver Mey, Lorenz Maximilian Schneider +1
A theoretical variation between the two distinct light-matter coupling regimes, namely weak and strong coupling, becomes uniquely feasible in open optical Fabry-Pérot microcavities…
Nonlinear refraction in CHNHPbBr single crystals
Christian Kriso, Markus Stein, Tobias Haeger +5
Hybrid lead halide perovskites, such as CHNHPbX (X=I, Br), are direct gap semiconductors that offer many superior optoelectronic properties combined with extremely simp…
Spin-Layer- and Spin-Valley-Locking in CVD-Grown AA'- and AB-Stacked Tungsten-Disulfide Bilayers
Lorenz Maximilian Schneider, Jan Kuhnert, Simon Schmitt +10
Valley-selective optical selection rules and a spin-valley locking in transition-metal dichalcogenide (TMDC) monolayers are at the heart of "valleytronic physics", which exploits t…
Shedding light on the monolayer-WSe2 exciton's nature by optical effective-mass measurements
Lorenz Maximilian Schneider, Shanece Esdaille, Daniel Rhodes +3
Two-dimensional excitons formed in quantum materials such as monolayer transition-metal dichalcogenides and their strong light-matter interaction have attracted unrivalled attentio…
Enhancement of the Monolayer WS2 Exciton Photoluminescence with a 2D-Material/Air/GaP In-Plane Microcavity
Oliver Mey, Franziska Wall, Lorenz Maximilian Schneider +8
Light-matter interaction with two-dimensional materials gained significant attention in recent years leading to the reporting of weak and strong coupling regimes, and effective nan…
Microcavity-enhanced Kerr nonlinearity in a vertical-external-cavity surface-emitting laser
C. Kriso, S. Kress, T. Munshi +7
Self-mode-locking has become an emerging path to the generation of ultrashort pulses with vertical-external-cavity surface-emitting lasers. In our work, a strong Kerr nonlinearity…
Color Change Effect in an Organic-Inorganic Hybrid Material Based on a Porphyrin Diacid
Bettina Wagner, Natalie Dehnhardt, Martin Schmid +9
Porphyrinic materials show a range of interesting and useful optical and electrical properties. The less well-known sub-class of porphyrin diacids has been used in this work to con…
Influence of the Substrate Material on the Optical Properties of Tungsten Diselenide Monolayers
Sina Lippert, Lorenz Maximilian Schneider, Dylan Renaud +13
Monolayers of transition-metal dichalcogenides such as WSe2 have become increasingly attractive due to their potential in electrical and optical applications. Because the propertie…
Magneto photoluminescence measurements of tungsten disulphide monolayers
Jan Kuhnert, Arash Rahimi-Iman, Wolfram Heimbrodt
Layered transition-metal dichalcogenides have attracted great interest in the last few years. Thinned down to the monolayer limit they change from an indirect band structure to a d…
Gain spectroscopy of a type-II VECSEL chip
Christian Lammers, Markus Stein, Christian Berger +9
Using optical pump-white light probe spectroscopy the gain dynamics is investigated for a VECSEL chip which is based on a type-II heterostructure. The active region the chip consis…
Distinguishing photon and polariton lasing from GaAs microcavities by spectral and temporal analysis of the two-threshold behavior
Jean-Sebastian Tempel, Franziska Veit, Marc Aßmann +8
We compare polariton lasing with photon lasing of a planar GaAs/GaAlAs microcavity with zero detuning between the bare cavity mode and the bare exciton mode. For the emission from…