Essays about: "elektronik och fotonik"

Found 3 essays containing the words elektronik och fotonik.

  1. 1. High resolution imaging of GaAs nanowires

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

    Author : Andreas Johansson; [2015]
    Keywords : Scanning Tunneling Microscopy; STM; Nanowire; Gallium Arsenide; GaAs; Semiconductor; Atomic structure; Morphology; Nanoelectronics; Heterostructure; Physics and Astronomy;

    Abstract : Semiconductor nanowires (NWs) are expected to be the new building blocks in electronics and photonics, but improved understanding of the nanowire surfaces and electronic properties are required to realize it. In this bachelor thesis, wurtzite (Wz)-zincblende (Zb) axial heterostructure GaAs nanowires are studied using scanning tunneling microscopy and spectroscopy. READ MORE

  3. 2. Morphological Studies of Nanowire Surfaces Using Scanning Probe Techniques

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

    Author : Johan Knutsson; [2012]
    Keywords : STM; Nanowire; Semiconductor; Morphology; Surface; InAs; Heterostructure; Physics and Astronomy;

    Abstract : Highly structured polytypic InAs III-V semiconductor nanowires with an axial stacking of wurtzite (WZ) and zincblende (ZB) segments were studied using scanning tunneling microscopy and spectroscopy (STM/S). The periodic changes in the axial direction of the crystal structure were achieved by precisely tuning the growth parameters, and no unwanted doping gradient was required. READ MORE

  4. 3. Modelling and Design of Oversampled Delta-Sigma Noise Sharpers for D/A Conversion

    University essay from Institutionen för systemteknik

    Author : Vikram Singh Parihar; [2005]
    Keywords : Electrical engineering; Oversampled Delta- Sigma Noise shapers; Elektroteknik; elektronik och fotonik;

    Abstract : This thesis demonstrates the high- level modelling and design of oversampled delta- sigma noise shapers for D/A conversion. It presents an overview and study on digital- to- analog converters (DAC) followed by the noise shapers. It helps us to understand how to design a noise shaper model and algorithmic expressions are presented. READ MORE