David L. Hall
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View article: Euclid. II. The VIS Instrument
Euclid. II. The VIS Instrument Open
This paper presents the specification, design, and development of the Visible Camera (VIS) on the ESA Euclid mission. VIS is a large optical-band imager with a field of view of 0.54 deg^2 sampled at 0.1" with an array of 609 Megapixels and…
Object Registration in Neural Fields Open
Neural fields provide a continuous scene representation of 3D geometry and appearance in a way which has great promise for robotics applications. One functionality that unlocks unique use-cases for neural fields in robotics is object 6-DoF…
Reg-NF: Efficient Registration of Implicit Surfaces within Neural Fields Open
Neural fields, coordinate-based neural networks, have recently gained popularity for implicitly representing a scene. In contrast to classical methods that are based on explicit representations such as point clouds, neural fields provide a…
View article: Overview of Wide/Ultrawide Bandgap Power Semiconductor Devices for Distributed Energy Resources
Overview of Wide/Ultrawide Bandgap Power Semiconductor Devices for Distributed Energy Resources Open
This article provides an overview of power semiconductor devices (PSDs) for the distributed energy resource (DER) system. To begin with, an overview of electrically triggered silicon carbide (SiC) and gallium nitride (GaN) devices followed…
View article: Pulse Compression Photoconductive Switching Using Negative Differential Mobility
Pulse Compression Photoconductive Switching Using Negative Differential Mobility Open
This work demonstrates a novel optoelectronic device with the potential for use as a high-frequency, high-power RF source or amplifier. The device is a gallium–arsenide coplanar waveguide with a small gap in the signal trace for optical il…
High temperature isotropic and anisotropic etching of silicon carbide using forming gas Open
Plasma-etched micropillars in 4H-SiC were etched in forming gas (4% H2, 96% N2) at 1500, 1550, and 1600 °C at 2.4 and 9.4 standard liters per min (slm). At 2.4 slm, oxygen from the aluminum oxide components of the tube furnace oxidized the…
Acknowledgments Open
This work was conceived and written in a variety of contrasting locations.In addition to the athenaea at Austin.Berkeley, Boston
Extrinsic Absorption Pathways in Vanadium‐Doped SiC Measured Using a Total Internal Reflection Geometry Open
Optoelectronics This image shows an illustration of the light trapping geometry used to capture low absorbing light used to identify the relative efficiency of different low absorption coefficient photo-absorption pathways for SiC:V with v…
Design, Fabrication, And Testing Of Wooden Trusses For Undergraduate Mechanics Open
NOTE: The first page of text has been automatically extracted and included below in lieu of an abstract Session 1368 Design, Fabrication and Testing of Wooden Trusses for Undergraduate Mechanics David Hall, Kelly Crittenden College of Engi…
Extrinsic Absorption Pathways in Vanadium‐Doped SiC Measured Using a Total Internal Reflection Geometry Open
Vanadium‐doped SiC is under study for high‐power photoconductive switches and is receiving increased attention as a potential material system for quantum computing, as the V can act as a quantum emitter at telecom wavelengths. Knowledge of…
View article: Carrier recombination parameters in diamond after surface boron implantation and annealing
Carrier recombination parameters in diamond after surface boron implantation and annealing Open
An optical pump–probe technique was used to detect spatial distribution of carrier lifetimes across the thickness of a high-quality diamond device structure. Two samples with as-received and boron implanted surfaces were compared to assess…
Photoconductive Switch with High Sub-Bandgap Responsivity in Nitrogen-Doped Diamond Open
To evaluate nitrogen-doped diamond as a candidate for Photoconductive Semiconductor Switches (PCSS) triggered in the sub-bandgap visible range, we have fabricated and tested diamond PCSS from a set of diamond grades of varying nitrogen con…
Maskless random antireflective nanotexturing of single crystal SiC Open
Random nanotexturing of optics and semiconductors has proven to be a highly effective way to produce high transmittivity, low reflective surfaces. Here, the authors report a one-step technique using SF6 reactive ion etching to produce nano…
A Total Internal Reflection Photoconductive Switch Open
We demonstrate a novel illumination technique for extrinsic photoconductive switches based on the creation of a total internal reflection trap to increase the optical path length. The optimal geometry is a square substrate illuminated from…
Gamification: Gamified Elements’ Impact on Online Trust Open
The purpose of this study is to investigate the effects of gamification on online trust, testing the impact through the use of an e-commerce website, Ebay. The objective of the paper is to discover how a certain type of visual design eleme…
Optimizing Radiation Doses for Computed Tomography Across Institutions Open
Reviewing institutional doses and sharing dose-optimization best practices resulted in lower radiation doses for chest and abdominal CT and more consistent doses for head CT.