Sökning: "Transfer Matrix Method TMM"

Hittade 4 uppsatser innehållade orden Transfer Matrix Method TMM.

  1. 1. Numerical Simulations of Resonant Tunnelling Diodes

    Kandidat-uppsats, KTH/Skolan för teknikvetenskap (SCI)

    Författare :Love Sundström; Alexander Holmström Janeld; [2023]
    Nyckelord :Quantum mechanics; numerical methods; resonant tunnelling diode;

    Sammanfattning : In this thesis, four different numerical techniques are implemented for the purpose of simulating resonant tunnelling diodes (RTDs). The chosen methods were: piecewise constant transfer matrix (TMM-C), piecewise linear transfer matrix (TMM-L), quantum transmitting boundary method (QTBM), and the Crank-Nicolson method (CN). LÄS MER

  3. 2. Stacked Dual Narrowband Organic Near-Infrared Photodetectors

    Master-uppsats, Linköpings universitet/Institutionen för fysik, kemi och biologi

    Författare :Yazhong Wang; [2017]
    Nyckelord :Near-infrared; photodetectors; CT states; Fabry-Perot resonant cavity; resonant cavity enhancement; tunability; full width at half maximum;

    Sammanfattning : Compared with the detector devices made of inorganic semiconductors, organic photodetectors are granted with additional strengths, such as flexibility, high scalability and bio-compatibility. However, in the family of organic optoelectronic devices, the detectors that are capable of detecting photons at two or multiple specific wavelengths are still missing. LÄS MER

  4. 3. A framework for designing a modular muffler system by global optimization

    Magister-uppsats, KTH/Optimeringslära och systemteori

    Författare :Fredrik Frithiof; [2015]
    Nyckelord :Muffler Optimization; Four-pole Method; Transfer Matrix Method TMM ; Global Search; MultiStart; Genetic Algorithm; Pattern Search; Simulated Annealing; Ljuddämparoptimering; 4-polsmetoden; Transfer Matrix Method TMM ; Global Search; MultiStart; Genetic Algorithm; Pattern Search; Simulated Annealing;

    Sammanfattning : When creating a muffler to be installed on a noise generating machine, the design parameters as well as the placements of sound attenuating elements has to be optimized in order to minimize the sound coming out of the equipage. This is exemplified in a small project task for students of a basic course in optimization at KTH. LÄS MER

  5. 4. Acoustic properties of porous materialsused in silencers

    Master-uppsats, KTH/Farkost och flyg

    Författare :Jesper Kristoffersson; [2013]
    Nyckelord :;

    Sammanfattning : The aim of this master thesis is an experimental investigation of the acoustic characteristics of absorbing materials used in mufflers for trucks and cars. The difference in the composition between different wool type materials consists of difference in material, fibre diameter, length, density and fibre orientation. LÄS MER