A5107598781- Radiation Detection and Scintillator Technologies
- Luminescence Properties of Advanced Materials
- Electronic and Structural Properties of Oxides
- CCD and CMOS Imaging Sensors
- Semiconductor materials and devices
- Advanced Semiconductor Detectors and Materials
- Advanced Optical Sensing Technologies
- Atomic and Subatomic Physics Research
- Particle Detector Development and Performance
- Random lasers and scattering media
- Advanced Fiber Optic Sensors
- Advanced Fluorescence Microscopy Techniques
- Neural Networks and Reservoir Computing
- Dark Matter and Cosmic Phenomena
- Radiation Effects in Electronics
Centre for Quantum Technologies
2023-2024
National University of Singapore
2023-2024
ETH Zurich
2015
The Large Electron Multipliers (LEMs) are key components of double phase liquid argon TPCs. drifting charges after being extracted from the amplified in LEM positioned half a centimeter above pure vapor at 87 K. is characterised by size its dielectric rim around holes, thickness insulator, diameter holes as well their geometrical layout. impact those design parameters on amplification were checked testing seven different LEMs with an active area 10×10 cm2 TPC 21 cm drift. We studied response...
Quantum photonic devices operating in the single photon regime require detection and characterization of quantum states light. Chip-scale, waveguide-based are a key enabling technology for increasing scale complexity such systems. Collecting photons from multiple outputs at end-face chip is core task that frequently non-trivial, especially when output ports densely spaced. We demonstrate novel, inexpensive method to efficiently image route individual modes polymer chip, where undergo walk....
Abstract When operating in space, on-board Silicon Geiger-Mode Avalanche Photodiodes (GM-APDs) are exposed to radiation damage that result an increase dark count rates. Thermal annealing has been found mitigate the damage, although prior studies have largely focused on following a single session of proton irradiation. This work reports thermal can be performed simply with built-in thermo-electric coolers GM-APDs. Annealing was also done 10 min intervals for clearer view recovery curve....
Abstract When operating in space, on-board Silicon Geiger-Mode Avalanche Photodiodes (GM-APDs) are exposed to radiation damage that result an increase dark count rates. Thermal annealing has been found mitigate the damage, although prior studies have largely focused on following a single session of proton irradiation. This work reports thermal can be performed simply with built-in thermo-electric coolers GM-APDs. Annealing was also done 10 min intervals for clearer view recovery curve....
This work investigates the use of a fiber piano in controlling spatial modes few mode fibers. It has been found that together with sub-optimal coupling into SMF-28 fibre and half quarter waveplates, is capable producing reproducing desired up to $LP_{11}$ when using 808 nm light $LP_{21}$ 632.8 light. The control profile extends down single photon level. demonstrated help correlated pairs generated via spontaneous parametric conversion.
When operating in space, on-board Silicon Geiger-Mode Avalanche Photodiodes (GM-APDs) are exposed to radiation damage that result an increase dark count rates. Thermal annealing has been found mitigate the damage, although prior studies have largely focused on following a single session of proton irradiation. This work reports thermal can be performed simply with built-in thermo-electric coolers GM-APDs. Annealing was also done 10 min intervals for clearer view recovery curve. Mitigation...
Guo et al, 2023, report that NbOCl 2 is a novel thin-material SPDC source. This work presents optical measurements on thick flakes of the material differ from standard sources like LiNbO 3 .
Guo et al, 2023, report that NbOCl<sub>2</sub> is a novel thin-material SPDC source, but further optical measurements on thicker samples of the material suggest does not behave like conventional producing materials. In this paper, we following: (1) completely transparent at reported pump wavelength 404 nm, (2) behaves as polarizer 405 (3) coincidences above noise level around 810 nm were obtained when pumping and varied with polarization, (4) more 780 fails to yield any detectable photon pairs.
Guo et al, 2023, report that NbOCl 2 is a novel thin-material SPDC source. This work presents optical measurements on thick flakes of the material to understand conditions for performing SPDC.
This work reports that thermal annealing silicon avalanche photodiodes mitigates damage from repeated γradiation by: (1) halving the increase in dark counts on average and (2) outperforming room temperature (25°C) by about 33%.