A5101693933- Quantum optics and atomic interactions
- Quantum Information and Cryptography
- Semiconductor Quantum Structures and Devices
- Quantum Computing Algorithms and Architecture
- Quantum and electron transport phenomena
- Terahertz technology and applications
- Photonic and Optical Devices
- Laser-Matter Interactions and Applications
- Advanced Fiber Laser Technologies
- Quantum Mechanics and Applications
Universität Innsbruck
2023-2024
Abstract Shaped laser pulses have been remarkably effective in investigating various aspects of light–matter interactions spanning a broad range research. Chirped exhibiting time‐varying frequency, or quadratic spectral phase, form crucial category the group shaped pulses. This type made ubiquitous presence from spectroscopic applications to developments high‐power technology, and nanophotonics quantum optical communication, ever since their introduction. In case technologies recently,...
Quantum communication networks rely on quantum cryptographic protocols including key distribution (QKD) using single photons. A critical element regarding the security of QKD is photon number coherence (PNC), i.e. phase relation between zero and one-photon Fock state, which critically depends excitation scheme. Thus, to obtain flying qubits with desired properties, optimal pumping schemes for emitters need be selected. Semiconductor dots generate on-demand photons high purity...
A scalable source of single photons is a key constituent an efficient quantum photonic architecture. To realize this, it beneficial to have ensemble emitters that can be collectively excited with high efficiency. Semiconductor dots hold great potential in this context due their excellent photophysical properties. Spectral variability commonly regarded as drawback introduced by the fabrication method. However, frequency-multiplexed single-photon platform. Chirped pulse excitation, relying on...
Because dark excitons in quantum dots are not directly optically accessible, so far they have played a significant role using for photon generation. They possess significantly longer lifetimes than their brighter counterparts and hence offer enormous potential storage or manipulation. In this work, we demonstrate an all-optical retrieval of the spin-forbidden exciton dot from ground state employing chirped pulses in-plane magnetic field. Our experimental findings excellent agreement with...
The generation of single photons using solid-state quantum emitters is pivotal for advancing photonic technologies, particularly in communication. As the field continuously advances toward practical use cases and beyond shielded laboratory environments, specific demands are placed on robustness light sources during operation. In this context, process against intrinsic extrinsic effects a major challenge. Here, we present robust scheme coherent indistinguishable single-photon states with very...
Abstract Quantum communication networks rely on quantum cryptographic protocols including key distribution (QKD) using single photons. A critical element regarding the security of QKD is photon number coherence (PNC), i.e. phase relation between zero and one-photon Fock state, which critically depends excitation scheme. Thus, to obtain flying qubits with desired properties, optimal pumping schemes for emitters need be selected. Semiconductor dots generate on-demand photons high purity...