A5029379850- Radiation Detection and Scintillator Technologies
- Advanced Optical Sensing Technologies
- Semiconductor materials and devices
- Dark Matter and Cosmic Phenomena
- Atomic and Subatomic Physics Research
- Neutrino Physics Research
- Integrated Circuits and Semiconductor Failure Analysis
- Medical Imaging Techniques and Applications
- Physics of Superconductivity and Magnetism
- Photonic and Optical Devices
- 3D IC and TSV technologies
- Quantum and electron transport phenomena
- CCD and CMOS Imaging Sensors
- Particle Detector Development and Performance
- Advancements in Semiconductor Devices and Circuit Design
- Semiconductor Quantum Structures and Devices
- Electronic Packaging and Soldering Technologies
- Microwave Engineering and Waveguides
- Magnetic and transport properties of perovskites and related materials
- Advanced Fluorescence Microscopy Techniques
- Terahertz technology and applications
- Particle physics theoretical and experimental studies
- Analytical Chemistry and Sensors
- Nuclear Physics and Applications
- Photocathodes and Microchannel Plates
Université de Sherbrooke
2015-2024
McGill University
2019-2023
Laboratoire Nanotechnologies et Nanosystèmes
2017-2022
Centre de Nanosciences et de Nanotechnologies
2017-2021
Chalmers University of Technology
2003-2006
National Physical Laboratory
2003
IBM (United States)
2003
The next-generation Enriched Xenon Observatory (nEXO) is a proposed experiment to search for neutrinoless double beta ($0\nu\beta\beta$) decay in $^{136}$Xe with target half-life sensitivity of approximately $10^{28}$ years using $5\times10^3$ kg isotopically enriched liquid-xenon time projection chamber. This improvement two orders magnitude over current limits obtained by significant increase the mass, monolithic and homogeneous configuration active medium, multi-parameter measurements...
Abstract The nEXO neutrinoless double beta (0 νββ ) decay experiment is designed to use a time projection chamber and 5000 kg of isotopically enriched liquid xenon search for the in 136 Xe. Progress detector design, paired with higher fidelity its simulation an advanced data analysis, based on one used final results EXO-200, produce sensitivity prediction that exceeds half-life 10 28 years. Specifically, improvements have been made understanding production scintillation photons charge as...
The projected performance and detector configuration of nEXO are described in this pre-Conceptual Design Report (pCDR). is a tonne-scale neutrinoless double beta ($0νββ$) decay search $^{136}$Xe, based on the ultra-low background liquid xenon technology validated by EXO-200. With $\simeq$ 5000 kg enriched to 90% isotope 136, has half-life sensitivity approximately $10^{28}$ years. This represents an improvement about two orders magnitude with respect current results. Based experience gained...
In this paper, dielectric ribbon waveguides (DRWs) are designed and characterized to work in the F (90-140 GHz) G (140-220 frequency bands. High resistivity silicon (HR-silicon) due its high transparency these bands, low-cost fabrication process, were selected for of waveguides. The guided modes DRW studied using Marcatili multi-line methods. A design procedure optimal single-mode propagation was introduced. wave attenuation inside waveguide is discussed. Our experiments show that HR-silicon...
This paper presents a new quenching circuit (QC) and single photon avalanche diode (SPAD) implemented in TSMC CMOS 65 nm technology. The QC was optimized for timing resolution (SPTR) with view to an implementation 3D digital SiPM. presented has jitter of 4 ps full width at half maximum (FWHM) the SPAD 7.8 FWHM SPTR. adjustable threshold allows optimization as well excess voltage rise time characterization. threshold, hold-off recharge are essential optimize performances each SPAD. also...
MgB 2 nanobridges were fabricated by e-beam lithography and Ar-ion beam milling. Nanobridges of widths ranging from 60 nm to 1μm 3μm in length realized milling using amorphous carbon as etching mask. The processing did not harm the superconducting properties appreciably. High values critical current density, more than 10MA∕cm2, measured for bridges with down nm. Current-voltage (I-V) characteristics showed a behavior typical bridge going normal, after is exceeded, remaining normal decreased...
Abstract The challenge to reach 10 ps coincidence time resolution (CTR) in time-of-flight positron emission tomography (TOF-PET) is triggering major efforts worldwide, but timing improvements of scintillation detectors will remain elusive without depth-of-interaction (DOI) correction long crystals. Nonetheless, this momentum opportunely brings up the prospect a fully time-based DOI estimation since fast signals intrinsically carry information, even with traditional single-ended readout....
A flux qubit is designed and fabricated that capitalizes on intrinsic properties of submicron YBCO (yttrium-barium-copper oxide high-${T}_{c}$ superconductor) grain boundary junctions. The operating point protected from the fluctuations external fields, already classical level. effects perturbations only appear in third or fourth order, depending character coupling. estimates decoherence due to show an experimental observation coherent quantum tunneling Rabi oscillations system feasible.
Future tonne-scale liquefied noble gas detectors depend on efficient light detection in the VUV range. In past years Silicon Photomultipliers (SiPMs) have emerged as a valid alternative to standard photomultiplier tubes or large area avalanche photodiodes. The next generation double beta decay experiment, nEXO, with 5 tonne liquid xenon time projection chamber, will use SiPMs for detecting $178\,\text{nm}$ scintillation light, order achieve an energy resolution of $\sigma / Q_{\beta\beta} =...
Single Photon Avalanche Diodes (SPAD) are known for their excellent timing performance which enables Time of Flight capabilities in positron emission tomography (PET). However, current array architectures juxtapose the SPAD with its ancillary electronics at expense a poor fill factor array. The 3D vertical integration SPADs and readout represents solution to aforementioned problem. Compared systems external readout, reduces interconnect parasitic capacitance while greatly increasing...
The 3D vertical integration of SPAD and readout electronics is a promising avenue to high performance photodetectors. This approach will minimize most limitations current SiPM lead better performances in terms effective PDE, timing added functionalities. In this paper, we present new integrated digital electronic architecture. specific architecture aims replace conventional analog with the benefits significantly lower constant output capacitance as well immunity gain variation on single...
The predominant d-wave pairing symmetry in high temperature superconductors allows for a variety of current-phase relations Josephson junctions, which is to certain degree fabrication controlled. In this letter we report on direct experimental observations the effects non-sinusoidal dependence YBCO dc-SQUIDs, agree with theoretical description system.
The performances of a parallel plate waveguide (PPWG) supported by perfect electric conductor (PEC)-graphene and graphene-graphene plates are evaluated. graphene behavior is modeled as an anisotropic medium with both diagonal Hall conductivities derived from Kubo formula. PPWG modes PEC-graphene studied. Maxwell's equations solved for these two waveguides, while the layers biased field only magnetic fields. It shown that when biases applied to graphene, hybrid mode (simultaneous transverse...
We developed a configurable model of single photon avalanche diodes (SPAD) array photodetectors with intelligent control and active quenching. In this individual components can be simulated independently subsequently linked to provide the overall detector response. The enables simulation entire analysis performance, including detection efficiency, timing energy resolution. It used optimize performance for specific applications, such as positron emission tomography (PET). simulator consists...
Abstract A new trend in large area noble liquid experiments is to measure the scintillation light with photodetectors and their electronics inside active volume. Compared typical approach of using silicon photomultipliers (SiPM) an analog readout chain leading analog-to-digital converter, this paper presents a 3D photon-to-digital converter (PDC) that takes advantage binary nature single-photon avalanche diodes (SPAD). The contains 4096 pixels over 25 mm 2 , each including bonding pad...
We present the realization of Single Photon Avalanche Diode (SPA D) arrays for Positron Emission Tomography (PET). These SPAD are designed in Teledyne BALSA High Voltage (HV) CMOS technology targeted a 3 dimensional (3D) heterogeneous integration with deep-submicron readout electronics to realize 3D Counting Module (3DSPCM). developing post-process Through Silicon Vias (TSV) at Universite de Sherbrooke implement bonding. The and reduces interconnect parasitic capacitance, greatly increases...
In this paper we examine the state-of-the-art patterning techniques for fabrication of ultrasmall bicrystal Josephson junctions in ${\mathrm{YBa}}_{2}{\mathrm{Cu}}_{3}{\mathrm{O}}_{x}.$ We determine dependence junction parameters---critical current, characteristic voltage ${I}_{c}{R}_{n},$ and capacitance---on its size. Using values Coulomb energies extracted from experiment, analyze dynamics zero-bias quantum regime. Finally, discuss relevance parameters, obtained transport measurements,...