A5021540983- Advanced Optical Sensing Technologies
- Advanced Fluorescence Microscopy Techniques
- Optical Imaging and Spectroscopy Techniques
- Optical Coherence Tomography Applications
- CCD and CMOS Imaging Sensors
- Mechanical and Optical Resonators
- Analytical Chemistry and Sensors
- Force Microscopy Techniques and Applications
- Diamond and Carbon-based Materials Research
- Biosensors and Analytical Detection
- Semiconductor Lasers and Optical Devices
- Photonic and Optical Devices
- Non-Invasive Vital Sign Monitoring
- Advanced Photonic Communication Systems
- Radiation Detection and Scintillator Technologies
École Polytechnique Fédérale de Lausanne
2022-2025
The Hanbury Brown–Twiss (HBT) effect holds a pivotal place in intensity interferometry and gave seminal contribution to the development of quantum optics. To observe such an effect, both good spectral timing resolutions are necessary. Most often, HBT is observed for single frequency at time due its limitations dealing with multifrequencies simultaneously, halting limiting some applications. Here, we report fast data-driven spectrometer built one-dimensional array single-photon-sensitive...
The overall sensitivity of frontside-illuminated, silicon single-photon avalanche diode (SPAD) arrays has often suffered from fill factor limitations. loss can however be recovered by employing microlenses, whereby the challenges specific to SPAD are represented large pixel pitch (> 10 µm), low native (as as ∼10%), and size (up mm). In this work we report on implementation refractive microlenses means photoresist masters, used fabricate molds for imprints UV curable hybrid polymers deposited...
We present an analog silicon photomultiplier (SiPM) based on a standard 55-nm Bipolar-CMOS-DMOS (BCD) technology. The SiPM is composed of 16 × single-photon avalanche diodes (SPADs) and measures 0.29 0.32 mm <inline-formula xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink"><tex-math notation="LaTeX">$^{2}$</tex-math></inline-formula> . Each SPAD cell passively quenched by monolithically integrated 3.3 V thick oxide transistor. measured gain 3.4 10...
We report on LinoSPAD2, a single-photon camera system, comprising 512×1 avalanche diode (SPAD) front-end and one or two FPGA-based back-ends. Digital signals generated by the SPADs are processed FPGA in real time, whereas offers full reconfigurability at very high level of granularity both time space domains. The LinoSPAD2 system can process 512 simultaneously through 256 channels, duplicated each back-end, with bank 64 time-to-digital converters (TDCs) operating 133 MSa/s, TDC has...
The Piccolo gated sensor features a 32x32 SPAD array of single-photon avalanche diodes (SPADs) operating in time-correlated counting (TCSPC). chip enables event-driven readout and maximum count rate 220 Mcps. is based on the original architecture, whereas pixel was redesigned to accommodate sub-nanosecond time gating circuitry. As result, pitch increased by 3 μm 31 with slightly lower fill factor 23.7%. time-gating circuitry comprises active recharge activate gate fast switch de-activate...
The Hanbury Brown-Twiss (HBT) effect holds a pivotal place in intensity interferometry and gave seminal contribution to the development of quantum optics. To observe such an effect, both good spectral timing resolutions are necessary. Most often, HBT is observed for single frequency at time, due limitations dealing with multifrequencies simultaneously, halting limiting some applications. Here, we report fast data-driven spectrometer built one-dimensional array single-photon-sensitive...
Abstract Cross-talk is a well-known feature of single-photon avalanche detectors. It especially important to account for this effect in applications involving temporal coincidences two or more photons registered by the sensor since case cross-talk may mimic useful signal. In work, we characterize LinoSPAD2 detector, as well perform joint measurements and Hanbury Brown-Twiss two-photon interference, comparing cross-calibrating both effects. With median dark count rate 125 cps/pixel, report...
The LinoSPAD2 camera combines a 512×1 linear single-photon avalanche diode (SPAD) array with an FPGA-based photon-counting and time-stamping platform, to create reconfigurable sensing system capable of detecting single photons.The read-out is fully parallel, where each SPAD connected different FPGA input.The hardware can be reconfigured achieve functionalities, such as photon counters, time-to-digital converter (TDC) arrays histogramming units.Time stamping performed by 64 TDCs, 20 ps...
SPADλ is a linear single-photon detector array with 320×1 avalanche diode (SPAD) pixels, featuring thermo-electric cooling for reduced noise. These SPADs offer low dark count rate and wide detection spectrum. Equipped microlenses, they achieve peak photon efficiency of 45% at 520 nm. This system can photons 4 Gcps provides time-tagging time-gating time-resolved detection. With 80 TDC channels, it achieves precision averaging better than 130 ps full width half maximum (FWHM). Ideal flow...
Cross-talk is a well-known feature of single-photon avalanche detectors. It especially important to account for this effect in applications involving coincidences two or more photons registered by the sensor since case cross-talk may mimic useful signal. In work, we characterize LinoSPAD2 detector, as well perform joint measurements and Hanbury Brown - Twiss two-photon interference, comparing cross-calibrating both effects. With median dark count rate 125 cps/pixel, report average...
The overall sensitivity of frontside-illuminated, silicon single-photon avalanche diode (SPAD) arrays has often suffered from fill factor limitations. loss can however be recovered by employing microlenses, whereby the challenges specific to SPAD are represented large pixel pitch (> 10 µm), low native (as as ~10%), and size (up mm). In this work we report on implementation refractive microlenses means photoresist masters, used fabricate molds for imprints UV curable hybrid polymers...
Silicon-based single-photon avalanche diodes (SPADs) implemented in front-side illuminated arrays and imagers have often suffered from fill factor limitations. The corresponding reduced sensitivity can be sometimes traded off with longer acquisition times thanks to SPAD's noiseless read-out. use of SPADs however critically affected many applications, especially when photon-starved, or several photons need detected coincidence. loss recovered by employing microlens arrays, which are difficult...
The overall sensitivity of frontside-illuminated, silicon single-photon avalanche diode (SPAD) arrays has often suffered from fill factor limitations. loss can however be recovered by employing microlenses, whereby the challenges specific to SPAD are represented large pixel pitch (> 10 µm), low native (as as ~10%), and size (up mm). In this work we report on implementation refractive microlenses means photoresist masters, used fabricate molds for imprints UV curable hybrid polymers...
The overall sensitivity of frontside-illuminated, silicon single-photon avalanche diode (SPAD) arrays has often suffered from fill factor limitations. loss can however be recovered by employing microlenses, whereby the challenges specific to SPAD are represented large pixel pitch (> 10 µm), low native (as as ~10%), and size (up mm). In this work we report on implementation refractive microlenses means photoresist masters, used fabricate molds for imprints UV curable hybrid polymers...
We present an analog silicon photomultiplier (SiPM) based on a standard 55 nm Bipolar-CMOS-DMOS (BCD) technology. The SiPM is composed of 16$\times$16 single-photon avalanche diodes (SPADs) and measures 0.29$\times$0.32 mm$^2$. Each SPAD cell passively quenched by monolithically integrated 3.3 V thick oxide transistor. measured gain 3.4$\times$ 10$^5$ at 5 excess bias voltage. timing resolution (SPTR) 185 ps the multiple-photon (MPTR) 120 integrate into co-axial light detection ranging...