A5015925839- Nanowire Synthesis and Applications
- Photonic and Optical Devices
- Diamond and Carbon-based Materials Research
- Advanced Fiber Laser Technologies
- Quantum Information and Cryptography
- Electronic and Structural Properties of Oxides
- Ga2O3 and related materials
- Analytical Chemistry and Sensors
- Plasmonic and Surface Plasmon Research
- Integrated Circuits and Semiconductor Failure Analysis
- Optical Network Technologies
- Optical Coatings and Gratings
- Advancements in Semiconductor Devices and Circuit Design
- Thin-Film Transistor Technologies
- Advanced Semiconductor Detectors and Materials
- Semiconductor Lasers and Optical Devices
- Ion-surface interactions and analysis
- Photorefractive and Nonlinear Optics
- Photonic Crystals and Applications
Schott (Germany)
2022-2025
Technical University of Munich
2022-2025
Munich Center for Quantum Science and Technology
2023-2025
CeNTech
2023
Superconducting nanowire single-photon detectors (SNSPDs) are indispensable in fields such as quantum science and technology, astronomy, biomedical imaging, where high detection efficiency, low dark count rates timing accuracy required. Recently, helium (He) ion irradiation was shown to be a promising method enhance SNSPD performance. Here, we study how changes the underlying superconducting NbTiN film SiO2/Si substrate affect device While irradiated unirradiated films show similar...
Abstract We investigate the growth of amorphous MoSi thin films using magnetron co-sputtering and optimize conditions with respect to crystal structure superconducting properties (e.g., critical temperature $$T_{\text {c}}$$ ). The deposition pressure, Mo:Si stoichiometry substrate are systematically varied achieve a transition 8.4(3) K for thickness 17.7(8) nm 6.2(9) 4.3(4) thick film. For Mo concentrations above 81% crystalline phase $$\hbox {Mo}_\text {3}$$ <mml:math...
Abstract Triangular cross-section silicon carbide (SiC) photonic devices have been studied as an efficient and scalable route for integration of color centers into quantum hardware. In this work, we explore collection detection center emission in a triangular SiC waveguide by introducing crystal mirror on its one side superconducting nanowire single photon detector (SNSPD) the other. Our modeled with randomly positioned emitter maximum coupling efficiency 89% desired optical mode high (...
Abstract Achieving homogeneous performance metrics between nominally identical pixels is challenging for the operation of arrays superconducting nanowire single‐photon detectors (SNSPDs). Here, local helium ion irradiation utilized to post‐process and tune detection efficiency, switching current, critical temperature individual devices on same chip. For 12 nm thick highly absorptive SNSPDs, which are barely sensitive single photons with a wavelength 780 prior He irradiation, an increase...
The authors present the dependence of timing jitter superconducting nanowire single-photon detectors on multi-layer sample design and slew rate.
Abstract We investigate the growth conditions for thin ( <?CDATA ${\leqslant}200$?> <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" overflow="scroll"> <mml:mrow> <mml:mo>⩽</mml:mo> <mml:mn>200</mml:mn> </mml:mrow> </mml:math> nm) sputtered aluminum films. These coatings are needed various applications, e.g. advanced manufacturing processes in aerospace industry or nanostructures quantum devices. Obtaining high-quality films, with low roughness, requires precise optimization of...
We investigate the influence of helium ion irradiation on properties NbTiN superconducting single-photon detectors and observe enhanced detector performance. Tailoring design enables that outperform optimized unirradiated detectors.
Nowadays, Superconducting Nanowire Single-Photon Detectors (SNSPDs) play a significant role in quantum technologies and for general faint light detection. Typically, NbTiN SNSPDs are at most 8nm thick to achieve single-photon sensitivity. However, as absorption increases with film thickness, it is desirable use thicker films of 10 or 12nm considering that the probability places an upper limit achievable system detection efficiency. In this contribution, we present first time show increase...
Achieving homogeneous performance metrics between nominally identical pixels is challenging for the operation of arrays superconducting nanowire single-photon detectors (SNSPDs). Here, we utilize local helium ion irradiation to post-process and tune detection efficiency, switching current, critical temperature individual devices on same chip. For 12nm thick highly absorptive SNSPDs, which are barely sensitive prior irradiation, observe an increase system efficiency from $< 0.05\,\%$ $(55.3...
Superconducting nanowire single-photon detectors (SNSPDs) are a key building block in photon-based quantum computation and communication. To realize scalable photonic device, integration of SNSPDs on waveguides is necessary. Hereby, one the most promising waveguide materials lithium niobate-on-insulator (LNOI). find ideal superconductor growth conditions, this case NbTiN LNOI, we created series superconducting films, while varying superconductors stoichiometry. Here, produced become more...
Superconducting nanowire single-photon detectors (SNSPDs) are a key building block for photonic quantum technologies, as they provide means efficient readout of optical circuits with low timing jitter, dark counts and dead time. In this contribution we give general overview the working principle these devices look into several engineering aspects. We discuss influence stoichiometry NbTiN thin-films on detector performance find that ratio 65:35 Nb:Ti results in highest saturation SNSPDs...
Triangular cross-section SiC photonic devices have been studied as an efficient and scalable route for integration of color centers into quantum hardware. In this work, we explore collection detection center emission in a triangular waveguide by introducing crystal mirror on its one side superconducting nanowire single photon detector (SNSPD) the other. Our modeled with randomly positioned emitter maximum coupling efficiency 89 % desired optical mode high (> 75 %) more than half...
In recent years, Superconducting Nanowire Single-Photon Detectors (SNSPDs) have obtained tremendous attention as a possible key technology for photonic quantum processing and faint light detection. Here, we present our progress on engineering of the properties NbTiN SNSPDs fabricated various substrates measured. We discuss approaches to simultaneously improve most important figures merit (DCR, dead time, timing jitter, efficiency) well efficient characterization methods. Specifically, latter...
In this work, recent developments in the study of Superconducting Nanowire Single Photon Detectors (SNSPDs) are presented. This devices properties highly depends on quality superconducting films from which they fabricated. Here, we some film for SNSPDs made out NbTiN and MoSi function deposition parameters. Subsequently focus fabricated detector, such as efficiency, timing resolution energy sensitivity.