A5049141244- Optical Polarization and Ellipsometry
- Dark Matter and Cosmic Phenomena
- Particle Detector Development and Performance
- Atomic and Subatomic Physics Research
- Fish biology, ecology, and behavior
- Neurobiology and Insect Physiology Research
- CCD and CMOS Imaging Sensors
- Calibration and Measurement Techniques
- Ichthyology and Marine Biology
- Optical Wireless Communication Technologies
- Particle physics theoretical and experimental studies
- Stellar, planetary, and galactic studies
- Infrared Target Detection Methodologies
- Photoreceptor and optogenetics research
- Plant and animal studies
- Optical Network Technologies
- Electrostatic Discharge in Electronics
- Analog and Mixed-Signal Circuit Design
- Coral and Marine Ecosystems Studies
- Geology and Paleoclimatology Research
- Radiation Detection and Scintillator Technologies
- Marine animal studies overview
- Spacecraft and Cryogenic Technologies
- Photonic and Optical Devices
- Underwater Vehicles and Communication Systems
University of Liverpool
2020-2023
The University of Queensland
2018-2022
Rutherford Appleton Laboratory
2019
Washington University in St. Louis
2011-2018
A novel bioinspired polarization-sensitive imager enables passive underwater geolocalization with an accuracy of 61 km.
In this paper, we present recent work on bioinspired polarization imaging sensors and their applications in biomedicine. particular, focus three different aspects of these sensors. First, describe the electro-optical challenges realizing a imager, provide detailed description low-power complementary metal-oxide-semiconductor (CMOS) imager. Second, signal processing algorithms tailored for new class sensors, such as calibration interpolation. Third, emergence has enabled rapid progress...
Division-of-focal plane (DoFP) imaging polarimeters are useful instruments for measuring polarization information a variety of applications. Recent advances in nanofabrication have enabled the practical manufacture DoFP sensors visible spectrum. These made by integrating nanowire filters directly with an array, and size variations nanowires due to fabrication can cause optical properties vary up 20% across array. If left unchecked, these introduce significant errors when reconstructing...
In shallow water, downwelling light is refracted from surface waves onto the substrate creating bands of that fluctuate in both time and space, known as caustics. This dynamic illumination can be a visual hindrance for animals underwater environments. Animals such habitats may have evolved to use polarization vision discriminating objects while ignoring variations caused by To explore this possibility, crabs ( Carcinus maenas ) cuttlefish Sepia officinalis ), which vision, were presented...
Biologically inspired solutions for modern-day sensory systems promise to deliver both higher capacity and faster, more efficient processing of information than current computational approaches. Many animals are able perform remarkable sensing tasks despite only being process what would be considered modest data rates bandwidths. The key biological innovations revolve around dedicated filter designs. By sacrificing some flexibility, specifically matched hard-wired systems, designed primarily...
Polarization vision is widespread in nature, mainly among invertebrates, and used for a range of tasks including navigation, habitat localization communication. In marine environments, some species such as those from the Crustacea Cephalopoda that are principally monochromatic, have evolved to use this adaptation discriminate objects across whole visual field, an ability similar our own colour vision. The performance these polarization systems varies, few cephalopod tested so far notably...
Multiple parallel channels are ubiquitous in optical communications, with spatial division multiplexing (separate physical paths) and wavelength wavelengths) being the most common forms. Here, we investigate viability of polarization multiplexing, separation distinct communication through properties light. Two or more linearly polarized signals (at different angles) transmitted a medium, filtered using aluminum nanowire filters fabricated on-chip, received individual silicon photodetectors...
Abstract The ability to see ultraviolet (UV) light (<400 nm) may have importance for foraging, communication or navigation in many taxa including insects, crustaceans, fishes, amphibians, reptiles, birds and mammals. Behavioural experiments reveal how vision mediates such behaviour; however, our knowledge of UV perception is constrained by the challenge creating calibrating stimuli that reflect emit UV. Commonly used technologies displaying visual stimuli—such as computer screens...
The field of astronomy relies on spectral and polarization imagery recorded across a wide range spectra to make inferences about imaged objects from nearby distant galaxies. One the challenges in recording celestial information is multiple images filtered with various optics, such as linear filters or retarders, low-noise, low-dark-current sensors. In this paper, we present division focal plane polarimeter that can operate at room temperature down -20 °C. When imaging sensor operates °C,...
ARIADNE is a 1-ton (330 kg fiducial mass) dual-phase liquid argon (LAr) time projection chamber (TPC) featuring novel optical readout. Four electron-multiplying charge-coupled device (EMCCD) cameras are mounted externally, and these capture the secondary scintillation light produced in holes of thick electron gas multiplier (THGEM). Track reconstruction using this readout approach demonstrated. Optical has potential to be cost effective alternative charge future LArTPCs. In paper, technical...
Division-of-focal-plane (DoFP) polarimeters for the visible spectrum hold promise of being able to capture both angle and degree linear polarization in real-time at high spatial resolution. These sensors are realized by monolithic integration CCD imaging elements with metallic nanowire filter arrays focal plane sensor. large amounts raw data present unique computational challenges as they aim provide polarimetric information temporal resolutions. The image processing pipeline a typical DoFP...
Polarization imaging sensors using the division-of-focal-plane paradigm have recently emerged on market. These sensors, due to their compact design, are ideal for field work. One of major drawbacks in these is spatial variation optical response individual pixels across array. variations nanowires pixelated polarization filters. In this paper, we describe and compare two methods calibrating a division focal plane sensors. We present theoretical experimental data calibration methods.
Abstract This paper presents the design and preliminary results of a shunt voltage regulator two different bandgap reference designs for use with monolithic High Voltage CMOS (HV-CMOS) sensor in 150 nm technology node. One is based on Bipolar Junction Transistors (BJTs) as element circuit — rest entirely designed Metal–Oxide–Semiconductor Field-Effect (MOSFETs). The second makes MOSFETs exclusively.
Navigation is a challenging problem, particularly in the underwater marine environment. The maximum visibility pure water 80 m but such clarity rarely present nature, limiting utility of vision-based navigation techniques to much shorter distances clear waters. A further challenge lack visual features open Using an polarization video system inspired by mantis shrimp eye, we have previously shown that it possible bypass this limitation and perform celestial without direct observation sun....
ARIADNE is a 1-ton dual-phase Time Projection Chamber (TPC) with novel optical readout. The secondary scintillation light produced in the holes of THick Gas Electron Multiplier (THGEM) captured by Multiplying Charge Coupled Device (EMCCD) cameras or fast TPX3Cams mounted externally via glass viewports. Optical readout has potential to be cost effective alternative charge future LArTPCs. First ever images argon interactions from operation detector at CERN T9 testbeam are presented. 3D track...