A5037371334- Quantum Information and Cryptography
- Laser-Matter Interactions and Applications
- Solid State Laser Technologies
- Advanced Fiber Laser Technologies
- Quantum Computing Algorithms and Architecture
- Semiconductor Quantum Structures and Devices
- Neural Networks and Reservoir Computing
- Quantum Mechanics and Applications
- Photonic and Optical Devices
- Laser Design and Applications
- Mechanical and Optical Resonators
- Quantum Dots Synthesis And Properties
- Molecular Communication and Nanonetworks
- Quantum optics and atomic interactions
- Flowering Plant Growth and Cultivation
- Laser-Plasma Interactions and Diagnostics
- Astronomical Observations and Instrumentation
- Advanced Measurement and Detection Methods
- Infrared Target Detection Methodologies
Vienna Center for Quantum Science and Technology
2021-2023
University of Vienna
2021-2023
FH Campus Wien
2022
Christian Doppler Laboratory for Thermoelectricity
2021
Czech Academy of Sciences, Institute of Physics
2016-2018
Charles University
2016-2018
State-of-the-art quantum key distribution systems are based on the BB84 protocol and single photons generated by lasers. These implementations suffer from range limitations security loopholes, which require expensive adaptation. The use of polarization entangled photon pairs substantially alleviates threads while allowing for basically arbitrary transmission distances when embedded in repeater schemes. Semiconductor dots capable emitting highly with ultra-low multi-pair emission probability...
Quantum cryptography harnesses quantum light, in particular single photons, to provide security guarantees that cannot be reached by classical means. For each cryptographic task, the feature of interest is directly related photons' non-classical properties. dot-based single-photon sources are remarkable candidates, as they can principle emit deterministically, with high brightness and low multiphoton contribution. Here, we show these additional benefits, thanks tunability coherence emitted...
The development of kW-class diode-pumped picosecond laser sources emitting at various wavelengths started the HiLASE Center four years ago. A 500-W Perla C thin-disk with a diffraction limited beam and repetition rate 50–100 kHz, frequency conversion to mid-infrared (mid-IR), second fifth harmonic frequencies was demonstrated. We present an updated review on progress in compact femtosecond high average power radiation covering ultraviolet (UV) mid-IR spectral range Center. also report...
Building a quantum internet requires efficient and reliable hardware, from photonic sources to repeaters detectors, ideally operating at telecommunication wavelengths. Thanks their high brightness single-photon purity, dot (QD) hold the promise achieve communication rates for quantum-secured network applications. Furthermore, it was recently shown that excitation schemes such as longitudinal acoustic phonon-assisted (LA) pumping provide security benefits by scrambling coherence between...
Temporal-to-spatial demultiplexing routes non-simultaneous events of the same spatial mode to distinct output trajectories. This technique has now been widely adopted because it gives access higher-number multi-photon states when exploiting solid-state quantum emitters. However, implementations so far have required an always-increasing number active elements, rapidly facing resource constraints. Here, we propose and demonstrate a approach that utilizes only single element for routing to, in...
Building a quantum internet requires efficient and reliable hardware, from photonic sources to repeaters detectors, ideally operating at telecommunication wavelengths. Thanks their high brightness single-photon purity, dot (QD) hold the promise achieve communication rates for quantum-secured network applications. Furthermore, it was recently shown that excitation schemes, such as longitudinal acoustic phonon-assisted (LA) pumping, provide security benefits by scrambling coherence between...
A high-average-power wavelength-tunable picosecond mid-IR source based on parametric downconversion has been developed. The conversion system consists of two stages, optical generator and amplifier (OPA), which are pumped by an Yb:YAG thin-disk laser operated at 77 kHz repetition rate, 1030 nm wavelength, pulse duration down to 1.3 ps. signal beam is amplified up 9.2 W the idler 5.4 OPA pumping 43 W. Tunability between 1.70 1.95 μm for 2.2 2.6 achieved. rather simple power scalable.
The quest for a global quantum internet is based on the realization of scalable network which requires hardware with exceptional performance. Among them are light sources providing deterministic, high brightness, high-fidelity entangled photons and memories coherence times in millisecond range above. To operate scale, source should emit at telecommunication wavelengths minimum propagation losses. A cornerstone operation such demonstration teleportation. Here we realize full-photonic...
High average power wavelength tunable picosecond mid-IR source based on parametric down-conversion is being developed. The conversion system pumped by a Yb:YAG thin-disk laser delivering 100 W of at kHz repetition rate, 1030 nm wavelength, and 3 ps pulse width. First, part the beam pumps an optical generator (OPG) consisting PPLN crystal. generated determined PPLN's poling period temperature. Signal covered range between 1.46 mμ 1.95 mμ. corresponding idler wavelengths are 3.5 2.18 mμ,...
Get PDF Email Share with Facebook Tweet This Post on reddit LinkedIn Add to CiteULike Mendeley BibSonomy Citation Copy Text O. Novák, B. Csanaková, L. Rořkot, M. Vyvlečka, J. Mužík, Smrž, A. Endo, H. Jelínková, and T. Mocek, "High Power Picosecond Parametric Mid-IR Source Tunable Between 1.5 3.2 μm," in Laser Congress 2018 (ASSL), OSA Technical Digest (Optica Publishing Group, 2018), paper ATh2A.15. Export BibTex Endnote (RIS) HTML Plain alert Save article
The 100-kHz, 100-W, Yb:YAG thin-disk regenerative amplifier pumps the parametric mid-IR source. OPG stage (PPLN) is followed by OPA stages (KTP). idler of 2.2 µm wavelength taken from final amplifier.
Temporal-to-spatial mode demultiplexing routes non-simultaneous events of the same spatial to distinct output trajectories. This technique has now been widely adopted, because it gives access higher-number multi-photon states when exploiting solid-state quantum emitters. However, implementations so far have required an always-increasing number active elements and are therefore rapidly facing resource constraints. Here, we propose demonstrate a approach that uses only single element for...
Temporal-to-spatial mode demultiplexing routes non-simultaneous events of the same spatial to distinct output trajectories. This technique has now been widely adopted, because it gives access higher-number multi-photon states when exploiting solid-state quantum emitters. However, implementations so far have required an always-increasing number active elements and are therefore rapidly facing resource constraints. Here, we propose demonstrate a approach that uses only single element for...
Quantum dots, additionally to their high brightness and single-photon purity, provide unique security benefits thanks the tunability of coherence in emitted photon-number states. We identify optimal quantum-dot pumping schemes for quantum-cryptographic primitives.
Get PDF Email Share with Facebook Tweet This Post on reddit LinkedIn Add to CiteULike Mendeley BibSonomy Citation Copy Text O. Novák, M. Vyvlečka, L. Roškot, J. Mužík, Smrž, A. Endo, and T. Mocek, "Wavelength Tunable Picosecond Parametric Mid-IR Source Pumped by a High Power Thin-Disk Laser," in Laser Congress 2017 (ASSL, LAC), OSA Technical Digest (online) (Optica Publishing Group, 2017), paper JTh2A.42. Export BibTex Endnote (RIS) HTML Plain alert Save article
Mid-infrared (mid-IR) wavelength range is utilized in applications such as gas sensing, medicine, defence, and material processing. When using picosecond pulses high peak power reached at moderate pulse energy the heat affected zone low. A tunable mid-IR source would enable optimization of laser-matter interaction dependence on wavelength. Increase processing speed requires sources higher average power. Parametric devices offer both broad tunability scalability [1]. We are developing a ten...
Mid-IR wavelength range (between 2 and 8 μm) offers perspective applications, such as minimally-invasive neurosurgery, gas sensing, or plastic polymer processing. Maturity of high average power near-IR lasers is beneficial for powerful mid-IR generation by optical parametric conversion. We utilize in-house developed Yb:YAG thin-disk laser 100 W at 77 kHz repetition rate, 1030 nm, about ps pulse width pumping a ten-watt level picosecond source. Seed beam obtained in double-pass 10 mm long...
HiLASE facility focuses on development of high average power pulsed lasers with picosecond and nanosecond laser pulses. Recently, 500 W pulses energy 5 mJ 1 kW 100 J were reported. Current status future plans the are presented.
Semiconductor quantum dots (QDs) are able to confine single charges on the nanoscale in all three dimensions of space, making them excellent systems for exploring phenomena. In particular, QDs have demonstrated outstanding performance as sources entangled and indistinguishable photon pairs, properties highly desired fields communication -information processing. Here I report advances potential resources photonic networks, which allow overcome fundamental range limitations photon-based...