Charles E. Hunt
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Dopant Sensitive Electrolytic Etching of Germanium with High Selectivity Open
The enhanced charge carrier mobility and photon absorption compared to silicon make germanium attractive for next-generation photo diodes. However, the complex oxidation behavior of germanium challenges dopant-dependent selective etching t…
Communication—Controlling Etching of Germanium through Surface Charge Manipulation Open
Potassium hydroxide (KOH) aqueous solutions can effectively etch germanium. Etch rates were determined in an electrolytic etch cell. Electrically isolated Ge wafers were subject to an etch rate of 1.45 ± 0.07 nm min −1 , increasing to 12.6…
High-Performance Germanium P-I-N Photodiodes for High-Speed, Hard X-Ray Imaging Open
Design, fabrication, and measurement of vertical Germanium (Ge) Photodiodes for high-speed, hard X-Ray imaging is presented. The devices used atmospheric-pressure epitaxial absorption layers, varying absorption layer thicknesses (10 – 245 …
Electrolytic Etching of Germanium Substrates with Hydrogen Peroxide Open
Anodic electrolytic etching of germanium has been performed in hydrogen peroxide etchants with controlled external conditions. In-situ current and ex-situ etch-depths were measured and tracked with respect to etchant composition and stir r…
Geranium Photodiodes for Hard Xray Detection Open
This report summarizes the investigations engaged at UC Davis under subcontract B632083, as related to the LLNL-LDRD Project “High-Speed X-Ray Imager Arrays.” The first section entails work done within the Electrical and Computer Engineeri…
View article: p-i-n High-Speed Photodiodes for X-RAY and Infrared Imagers Fabricated by <em>In-Situ</em>-Doped APCVD Germanium Homoepitaxy
p-i-n High-Speed Photodiodes for X-RAY and Infrared Imagers Fabricated by <em>In-Situ</em>-Doped APCVD Germanium Homoepitaxy Open
Design, simulation, fabrication, and measurement have been performed using a new method for obtaining high-speed p-i-n germanium photodiodes for use in backside imaging arrays. These devices are proof-of-principal in situ-doped vertical me…
Global rise of potential health hazards caused by blue light-induced circadian disruption in modern aging societies Open
Mammals receive light information through the eyes, which perform two major functions: image forming vision to see objects and non-image forming adaptation of physiology and behavior to light. Cone and rod photoreceptors form images and se…