Projects from Prof. Dr. Torsten Meier
TRR 142 - Nonlinear strong-field dynamics of atomically thin transition metal dichalcogenides (A10)
Monolayers of Transition Metal Dichalcogenides (TMDCs) exhibit very high exciton binding energies of several hundred meV and extraordinarily strong optical nonlinearities. Stacking several monolayers allows one to tailor these properties by the choice of materials and their relative orientation. We will explore and manipulate such samples by using ...
Duration: 01/2022 - 12/2025
Funded by: DFG
PhoQC: Photonic Quantum Computing
Photonic Quantum Computing (PhoQC): The aim is to research the fundamentals for the realization of photonic quantum computers. For this purpose, an internationally leading research center is to be created at the University of Paderborn in perspective, in which the fields of physics, mathematics, engineering sciences, computer science and electrical ...
Duration: 11/2021 - 12/2024
Funded by: MKW NRW, EIN Quantum NRW
Semiconductor quantum wells excited by non-classical states of light: Interplay between photonic quantum correlations and many-body interactions in solid state systems
Compared to atomic systems, the theoretical description of the optical properties of bulk semiconductors and nanostructures is significantly more complex but also much richer and over a wide range designable by the choice of the nanostructure geometry and the material composition, e.g., in quantum wells. Whereas in atoms the electronic states are ...
Duration: 01/2019 - 12/2022
Funded by: DFG
TRR 142 - Widely non-defenerate stimulated two-photon emission in semiconductors (A07)
Two-photon emission is a process in which optical transitions occur through the simultaneous emission of two photons. Here, we will focus on experimental and theoretical studies of widely non-degenerate two-photon emission stimulated by femtosecond pulses. Similar to nonlinear optical absorptions, such processes are expected to be massively ...
Duration: 04/2018 - 12/2021
Funded by: DFG
TRR 142 - Integrierte messungsinduzierte Nichtlinearitäten mit integrierten supraleitenden Detektoren (C06)
This project will investigate the theoretical potential and experimental feasibility of integrating superconducting nanowire single-photon detectors (SNSPDs) on lithium niobate waveguides in order to implement a measurement-induced nonlinearity. Such nonlinearities arise from probabilistic mea-surement events and as such, can be implemented at very ...
Duration: 01/2018 - 12/2021
Funded by: DFG
The anomalous velocity in its ultrafast regime
Carriers in solids have fundamentally different properties than in free-space. One of the most intriguing differences is the anomalous velocity constituting carriers moving perpendicular to an electrical bias. This velocity is at the origin of fascinating physical phenomena such as the spin Hall and anomalous Hall effect and has direct impact on ...
Duration: 12/2016 - 12/2022
Funded by: DFG
TRR 142 - To nlinear spectroscopy of semiconductor nanostructures with quantum light (A02)
In this project, we will experimentally and theoretically study transient optical wave-mixing signals of semiconductor nanostructures under resonant excitation with pulsed quantum light. Quantum state tomography of the detected optical signals will provide essential information about the excitation of excitons with quantum light and will allow us ...
Duration: 04/2014 - 12/2025
Funded by: DFG
TTR 142 - Integrated SU(1,1) interferometers (C02)
The primary goal of this project phase is to develop LiNbO3 based integrated circuits for quantum metrology applications. Based on LiNbO3-tool box components developed in the first phase of the project, we plan to develop integrated non-linear SU(1,1) interferometers in different configurations. Such interferometers are a very promising tool for ...
Duration: 04/2014 - 12/2021
Funded by: DFG
Transregional Collaborative Research Center TRR 142 - Tailored Nonlinear Photonics: From Fundamental Concepts to Functional Structures
The central goal of this CRC is the exploration, development, and engineering of future nonlinear photonics, which uses state-of-the-art technological capabilities for the exploration of new physics and devices based on tailored strong nonlinearities and genuine quantum effects. Our research harnesses tailored solid-state systems and bridges the ...
Duration: 04/2014 - 12/2025
Funded by: DFG
SPP 1391 - Optimization, pulse shaping and optical control in nanostructures
The goal of this research project is the application of optimization approaches to optically excited nanostructures consisting of metal, dielectrics and semiconductors including hybrid structures. Allowing variation of geometrical features of nanostructures and pulse shaping, the maximization of target functions is achieved using problem-specific ...
Duration: 01/2012 - 12/2015
Funded by: DFG