Search for dissertations about: "GaAs"

Showing result 21 - 25 of 234 swedish dissertations containing the word GaAs.

  2. 21. Tunneling Based Electronic Devices

    Author : Erik Lind; Institutionen för elektro- och informationsteknik; []
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; SiGe; Esaki Diodes; classical mechanics; quantum mechanics; relativity; termodynamik; relativitet; kvantmekanik; statistisk fysik; Matematisk och allmän teoretisk fysik; thermodynamics; gravitation; statistical physics; GaAs; Mathematical and general theoretical physics; Resonant Tunneling Permeable Base Transistors; Resonant Tunneling Diodes; klassisk mekanik; Fysicumarkivet A:2004:Lind;

    Abstract : This thesis concerns different kinds of tunneling based devices all showing negative differential resistance. The thesis is divided in three parts, resonant tunneling transistors, Esaki diodes and coupled zero dimensional systems. READ MORE

  4. 22. Atomic and Electronic Structure of III-V Semiconductor Surfaces

    Author : Örjan Olsson; Chalmers tekniska högskola; []
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; semiconductor; GaAs; photoelectron; scanning tunneling microscopy; valence band; core level; reconstruction; InAs; surface; InSb;

    Abstract : The atomic and electronic structure of clean and Cs-perturbed III-V semiconductors was studied by angle-resolved photoelectron spectroscopy (ARPES), surface core level spectroscopy (SCLS), and scanning tunneling microscopy (STM). The work can be divided into three parts, dealing with low-index sur-faces, high-index surfaces, and special features of InAs. READ MORE

  5. 23. Advanced Analog MMICs for mm-wave Communication and Remote Sensing in 0.15µm mHEMT Technology

    Author : Marcus Gavell; Chalmers tekniska högskola; []
    Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; GaAs; Point-To-Point; E-band; Modulators; HEMT; Receiver; microwave; Mixers; Geostationary; mm-wave;

    Abstract : Multi-Gigabit per second wireless communication and atmospheric remote sensing for weather forecasts are new applications in the mm-wave frequency spectra. The High Electron Mobility Transistor is an excellent technology for high frequency mm-wave applications. Its low noise and linear performance makes a 0. READ MORE

  6. 24. Adventures of III-V Semiconductor Surfaces

    Author : Sandra Benter; NanoLund: Centre for Nanoscience; []
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; III-V; semiconductor surfaces; Bismuth; InAs; GaAs; droplets; STM; XPS; XPEEM; ARPES; Fysicumarkivet A:2023:Benter;

    Abstract : Tailoring the surface composition and morphology of materials to enable new electronic devices is important for a wide range of applications such as quantum computing or spintronics. A fundamental understanding of the changes induced in the surface during different process steps can help to establish new synthesis routes as well as devices. READ MORE

  7. 25. Design and Characterization of MMIC IF VGA and Small Signal CMOS Millimeter Wave Amplifiers

    Author : M. Anowar Masud; Chalmers tekniska högskola; []
    Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; BCB; CMOS; GaAs; LNA; VGA; MMIC; HEMT;

    Abstract : The main aim of this work is to demonstrate the easibility of designing and characterizing monolithic microwave integrated circuit (MMIC) variable gain amplifiers (VGA) and small signal amplifiers in III-V (GaAs) and 90 nm CMOS technologies, respectively. The VGA is studied at the IFfrequency of 2. READ MORE