Publications (10)
On-chip generation of photon-triplet states
Stephan Krapick, Benjamin Brecht, Harald Herrmann +2
Efficient sources of many-partite non-classical states are key for the advancement of quantum technologies and for the fundamental testing of quantum mechanics. We demonstrate the…
Bright Integrated Photon-Pair Source for Practical Passive Decoy-State Quantum Key Distribution
Stephan Krapick, Michael Stefszky, Michal Jachura +3
We report on a bright, nondegenerate type-I parametric down-conversion source, which is well suited for passive decoy-state quantum key distribution. We show the photon-number-reso…
Superconducting Single-Photon Detectors with Enhanced High-Effciency Bandwidth
Stephan Krapick, Marina Hesselberg, Varun B. Verma +3
We present an alternative approach to the fabrication of highly efficient superconducting nanowire single-photon detectors (SNSPDs) based on tungsten silicide. Using well-establish…
Direct generation of genuine single-longitudinal-mode narrowband photon pairs
Kai-Hong Luo, Harald Herrmann, Stephan Krapick +6
The practical prospect of quantum communication and information processing relies on sophisticated single photon pairs which feature controllable waveform, narrow spectrum, excelle…
Analysis of photon triplet generation in pulsed cascaded parametric down-conversion sources
Stephan Krapick, Christine Silberhorn
We analyze the generation rates and preparation fidelities of photon triplet states in pulsed cascaded parametric down-conversion (PDC) under realistic experimental circumstances.…
Two-color narrowband photon pair source with high brightness based on clustering in a monolithic waveguide resonator
Kai-Hong Luo, Harald Herrmann, Stephan Krapick +5
We report on an integrated non-degenerate narrowband photon pair source produced at 890 nm and 1320nm via type II parametric down-conversion in a periodically poled waveguide with…