TRR 142 - Plasmonic nano-antenna enhanced nonlinear light emission and frequency conversion in dielectric and semiconductor micro-structures (A05)
The project deals with the enhancement of the weak light-matter interaction for nonlinear optical processes. Resonant excitation of coherent electron oscillations in metallic nanostructures can lead to strong field enhancements due to an antenna effect for the photons. With a suitable spatial arrangement of such antennas, even a kind of phase ...
Duration: 04/2014 - 12/2018
Funded by: DFG
TRR 142 - Tailored ultrafast acoustics for light emission modulation (A06)
The interaction of coherent acoustic phonons and excitons in low-dimensional semiconductor structures is in the focus of this project proposal. In the experiments, picosecond strain pulses are sent through the nanostructure. The response on the ultrafast acoustic impact is monitored through the light emission and tailored by nanoscale adjustment of ...
Duration: 04/2014 - 12/2025
Funded by: DFG
TRR 142 - Nonlinear multi-photon and harmonics generation spectroscopy on ZnO-based nanostructures (B01)
This project addresses the enhancement of nonlinear processes such as second and third harmonic generation as well as two- and three-photon absorption due to exciton effects. Due to the strong Coulomb interaction, ZnO is in the main focus in the project which exhibits both strong nonlinear material constants and exciton binding energy. In this ...
Duration: 04/2014 - 03/2021
Funded by: DFG
TRR 142 - Nonlinear optics and coherent intersubband physics of cubic GaN/Al(Ga)N heterostructures (B02)
Project B02 continues with the fabrication of cubic GaN/Al(Ga)N heterostructures and the investigation of their ultrafast and/or nonlinear optical properties. In the second period, we aim to enlarge and utilize the resonant nonlinearity associated with near-infrared intersubband transitions in quantum wells. This will be achieved by stronger doping ...
Duration: 04/2014 - 03/2021
Funded by: DFG
TRR 142 - Effect of extended and point defects on the ferroelectric and optical properties of LiNbO3 (B03)
The aim of this project is a deeper understanding of the effect of point defects and extended defects on the functional properties of periodically poled waveguide structures. Using a combined approach of theory and experiment, the influence of lattice defects on the optical properties of waveguides (refractive index change, photorefractive index, ...
Duration: 04/2014 - 12/2017
Funded by: DFG
TRR 142 - Ab initio theory for photonic materials (B04)
In this project, we develop computational methods and perform calculations that aim at the parameter-free modeling of the photonic materials studied in the CRC with predictive accuracy. Particular attention is paid to the nonlinear optical response. The influence of electronic many-body effects, electron-phonon coupling and spin-orbit coupling is ...
Duration: 04/2014 - 03/2021
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
TRR 142 - Nonlinear optics in quantum dot molecules (C03)
In this project, nonlinear optical effects in InGaAs quantum dot molecules (QPM) are investigated. The goal is to use the QPM as a frequency converter. To this end, absorbed photons excite an exciton complex, which is transformed into another complex by applied voltage pulses on nanosecond and picosecond time scales as charges are transferred ...
Duration: 04/2014 - 12/2018
Funded by: DFG
TRR 142 - Ultrafast electric control of optical polarizations and transitions (C04)
The goal of this project is the development of photonic devices with nonlinear functionalities that can be controlled by electric means. The new functional structures involve an ultrafast electronic circuit which drives a single quantum dot in a microresonator. By ultrafast Stark effect tuning we will attain coherent control over the exciton and ...
Duration: 04/2014 - 12/2021
Funded by: DFG
TRR 142 - Molecular beam epitaxy of tailored GaAs-based heterostructures (Z01)
This scientific service project provides the following GaAs-based samples for other projects within TRR: Heterostructures with embedded (In,Ga)As quantum dots with tailored emission and biexciton binding energies. Schottky diodes containing quantum dot molecules. Planar GaAs/AlAs-based resonator structures with integrated quantum wells. ...
Duration: 04/2014 - 12/2017
Funded by: DFG