Sökning: "compound semiconductor"

Visar resultat 1 - 5 av 50 avhandlingar innehållade orden compound semiconductor.

  1. 1. Optical Properties of Low Dimensional Semiconductor Materials

    Författare :Tiantian Han; Ying Fu; Per-Olof Holtz; KTH; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Semiconductor; Low dimensional; optics; Physics; Fysik;

    Sammanfattning : This dissertation presents a serial study on optical properties of different semiconductor materials. Three main types of studies are addressed: The role of doping levels of N and Al atoms in the room-temperature photoluminescence (PL) of 4H-SiC films for optoelectronic applications; the use of a basic Monte Carlo method combined with probability calculations of the time-dependent Schroedinger equation to manifest multi-photon absorption and emission of II-VI compound quantum dots (QDs) for bioimaging; a theoretical quantum chemistry approach to study of structure and optical properties of InGaAsN and GaAs clusters for laser technology applications. LÄS MER

  3. 2. Electronic Structure of Some Zincblende Semiconductor Surfaces

    Författare :Yousef Omar Khazmi; Chalmers tekniska högskola; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; CdTe; valence band; InP; tight-binding; core level; superlattice; surface; Green s function; adsorbates; semiconductor; GaAs; photoemission; electronic structure;

    Sammanfattning : The main aim of this thesis is to study and understand the surface electronic structure of compound semiconductors (ex. GaAs, InP, ..etc. LÄS MER

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

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

    Sammanfattning : 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. LÄS MER

  5. 4. Adventures of III-V Semiconductor Surfaces

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

    Sammanfattning : 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. LÄS MER

  7. 5. InP-based heterostructure field effect transistors and millimeter wave integrated circuits

    Författare :Anders Mellberg; Chalmers tekniska högskola; []
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; passive components; InP; MIM capacitor; high electron mobility transistor HEMT ; monolithic microwave integrated circuit MMIC ; CPW; TL; 2DEG; heterostructure field effect transistor HFET ; spiral inductor; modeling; wideband LNA; coplanar waveguides; microstrip transmission line; modulation doped field effect transistor MODFET ; III-V semiconductor; low noise amplifier; compound semiconductor; thin film resistor TFR ; indium phosphide; low noise amplifier;

    Sammanfattning : .... LÄS MER