Essays about: "Photodetectors"

Showing result 1 - 5 of 24 essays containing the word Photodetectors.

  1. 1. PERFORMANCE OF THE PHOTODETECTOR FOR THE ACTIVE SHIELD OF THE COSI SPACE TELESCOPE

    University essay from Luleå tekniska universitet/Institutionen för system- och rymdteknik

    Author : Daniel Álvarez Franco; [2022]
    Keywords : Geant4; scintillation; BGO; CsI; simulation; COSI; telescope; photoelectric effect;

    Abstract : The COmpton Spectrometer and Imager (COSI) is a space telescope that aims to study the soft gamma regime (0.2-5 MeV), capable of performing spectroscopy, imaging and polarimetry of cosmic gamma sources. READ MORE

  3. 2. Heat dissipation due to microvibrations in low temperature experiments

    University essay from KTH/Fysik

    Author : Julien Witwicky; [2021]
    Keywords : Spatial cryogenics; Micro-vibrations; Heat dissipation.; Rymdkryogenik; Mikrovibrationer; Värmeavledning.;

    Abstract : Ultra-sensitive photodetectors on-board space missions need very low temperatures to keep a good resolution. Cryo-coolers, such as pulse-tubes, help maintaining these conditions within a cryostat. In return however, they generate micro-vibrations. READ MORE

  4. 3. Sputtering of High Quality Layered MoS2 films

    University essay from Uppsala universitet/Fasta tillståndets elektronik

    Author : Sari Abid Al Shaybany; [2020]
    Keywords : MoS2; molybdenum; molybdenum disulfide; sputtering; magnetron sputtering; high quality; sulfur; H2S; argon; pressure; temperature; high temperature; monolayer; few layers; large scale;

    Abstract : We have deposited bulk, monolayer and few-layers as well as large-scale 2D layered MoS2 thin films by pulsed DC magnetron sputtering from an MoS2 target. MoS2 has gained great attention lately, together with other layered Transition Metal Dichalcogenides (TMDCs), for its unique optical and electrical properties with thickness-dependent bandgap. READ MORE

  5. 4. Investigating Optical-Field-Induced Currents in GaN using Ultrafast Lasers

    University essay from Lunds universitet/Synkrotronljusfysik; Lunds universitet/Fysiska institutionen

    Author : Vidar Flodgren; [2019]
    Keywords : GaN; gallium nitride; nanoscience; material science; ultrafast lasers; Yb Laser; Pharos Laser; titanium sapphire laser; device fabrication; lift-off; gold etching; optical-field-induced currents; modelling; matlab; Physics and Astronomy;

    Abstract : This study saw the development of an experimental setup capable of generating and measuring optical-field-induced currents in a variety of nanodevices fabricated specifically for this project. Each device design features two metallic contacts, closely separated by about 5 micrometers, deposited onto a semiconductor or insulator substrate. READ MORE

  6. 5. I-V and Optical Characterization of InP/InAsP Quantum Disc-in-Nanowire Infrared Photodetectors

    University essay from Högskolan i Halmstad/Akademin för informationsteknologi

    Author : Divya Raval; [2019]
    Keywords : Nanowires; Infrared photodetectors; Quantum disc; Photocurrent;

    Abstract : Photodetectors are semiconductor devices capable of converting optical signals into electrical signals. There is a wide range of applications for photodetectors such as fiber optics communication, infrared heat camera sensors, as well as in medical and military equipment. READ MORE