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Showing result 1 - 5 of 20 swedish dissertations matching the above criteria.

  2. 1. Modeling Quantum Cascade Lasers : The Challenge of Infra-Red Devices

    Author : Martin Franckie; Matematisk fysik; []
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; Quantum Cascade Lasers; Non-equilibrium Green s functions; Modeling; semiconductor heterostructures; Quantum Cascade Lasers; Non-equilibrium Green s functions; THz radiation; infrared radiation; semiconductor heterostructures; Modeling Simulation Technology; Fysicumarkivet A:2016:Franckié;

    Abstract : We live in a time of rapid scientific and technological advancement. People liv- ing 100 years ago could never dream of inventions like those having completely changed our way of life, and our perception of the world; computers, mobile phones, the Internet, space travel, unraveling the mysteries of the early universe and distant galaxies, and our insight into the microscopic world of quantum phe- nomena. READ MORE

  4. 2. MOSFET Modeling Aimed at Minimizing EMI in Switched DC/DC Converters Using Active Gate Control

    Author : Andreas Henriksson; Chalmers tekniska högskola; []
    Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Electromagnetic interference; Semiconductor device modeling; Adaptive control; MOSFET switches; Electromagnetic compatibility; State space methods; DC-DC power conversion; Power semiconductor diodes; Semiconductor device measurements;

    Abstract : This thesis deals with electromagnetic interference that can arise from switched DC/DC-converters intended for low-power applications, e.g. within the telecom or automotiveindustry. READ MORE

  5. 3. Long-Wavelength Vertical-Cavity Lasers : Materials and Device Analysis

    Author : Sebastian Mogg; KTH; []
    Keywords : VCL; VCSEL; vertical-cavity laser; semiconductor laser; long-wavelength; DBR; characterization; analysis; InP; InGaAs; quantum well; numerical modeling;

    Abstract : Vertical-cavity lasers (VCLs) are of great interest as lightsources for fiber-optic communication systems. Such deviceshave a number of advantages over traditional in-plane laserdiodes, including low power consumption, efficient fibercoupling, on-chip testability, as well as potential low-costfabrication and packaging. READ MORE

  6. 4. EMI from Switched Converters – Simulation Methods and Reduction Techniques

    Author : Andreas Henriksson; Chalmers tekniska högskola; []
    Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; state space methods; EMI; semiconductor device modeling; diode reverse recovery; diode modeling; conducted emissions; Semiconductor device measurements; DC DC converters;

    Abstract : In this thesis, the conducted EMI from switched power converters has been analyzed using various existing models, own-derived models as well as measurements. The ingoing passive components in a switching converter have been modeled with respect to their high frequency behavior and the static and dynamic behavior of the active semiconductors has been analyzed. READ MORE

  7. 5. Advanced TCAD Simulations and Characterization of Semiconductor Devices

    Author : Tony Ewert; Jörgen Olsson; Marcel Pelgrom; Uppsala universitet; []
    Keywords : Electronics; MOSFET; RDF; random dopant fluctuation; asymmetric; parametric mismatch; TCAD; compact modeling; fluctuation model; Elektronik;

    Abstract : Today, micro- and nano-electronic devices are becoming more complex and advanced as the dimensions are shrinking. It is therefore a very challenging task to develop new device technologies with performance that can be predicted. READ MORE