Sökning: "mid-infrared"

Visar resultat 1 - 5 av 16 uppsatser innehållade ordet mid-infrared.

  1. 1. Simulation of Quantum Cascade Lasers

    Kandidat-uppsats, Lunds universitet/Fysiska institutionen; Lunds universitet/Matematisk fysik

    Författare :Zakaria Mohamed; [2023]
    Nyckelord :Quantum Cascade Lasers; Simulations; Numerical Methods; Computational Models; Heterostructures; Physics and Astronomy;

    Sammanfattning : This thesis aimed to contribute to the improvement of Quantum Cascade Lasers (QCLs) by focusing on the effective determination of quantum levels in these devices. The current method relies on an outdated Fortran code, which poses challenges when integrating into optimization schemes. LÄS MER

  3. 2. Framställning av multilagerfilmen AlN-HQ

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

    Författare :Matilda Karlsson; [2021]
    Nyckelord :ALD; CVD; MLD;

    Sammanfattning : The method Atomic Layer Deposition, ALD, has been available since the 1970´s and it has opened the possibility to fabricate methods for inorganic thin films on a nanoscale. Later the interest for fabricating organic thin films with Molecular Layer Deposition, MLD, and controlling both the thickness and the composition of the film on a molecular scale. LÄS MER

  4. 3. Simulation of THz Quantum Cascade Lasers

    Master-uppsats, Lunds universitet/Matematisk fysik; Lunds universitet/Fysiska institutionen

    Författare :Viktor Rindert; [2021]
    Nyckelord :Physics and Astronomy;

    Sammanfattning : Quantum Cascade Lasers (QCLs) have since their invention in 1994 become a crucial source for mid-infrared and THz radiation. Mid-infrared QCLs have achieved room temperature operation while THz QCLs have not. As such, simulations are an important tool in order to achieve a THz QCL operational at room temperature. LÄS MER

  5. 4. Towards the detection of single photons in the mid-infrared

    Master-uppsats, KTH/Tillämpad fysik

    Författare :Bruno Lopez; [2021]
    Nyckelord :mid-infrared; single-photon; superconducting; nanowire; nanotechnology; quantum technologies; imaging; mitten av infraröd; enfoton; supraledande; nanotråd; nanoteknik; kvantteknologi; avbildning;

    Sammanfattning : In this project, the fabrication of single-photon detectors based on superconducting nanowires is presented, with great focus on extending their operation range to the mid infrared. In particular, Niobium Titanium Nitride (NbTiN) and Molybdenum Silicide (MoSi), superconducting materials with different properties, are presented, studied and used as fabrication platforms. LÄS MER

  7. 5. Detection of nitrous oxide through IR-DFWM in gas flows with future application in ammonia flames

    Master-uppsats, Lunds universitet/Förbränningsfysik; Lunds universitet/Fysiska institutionen

    Författare :Martin Passad; [2021]
    Nyckelord :Physics; Optics; Lasers; Environment; Hydrogen; Hydrogen Energy; Ammonia Energy; DFWM; Ammonia; Nitrous Oxide; Ammonia Flame; Ammonia Combustion; Physics and Astronomy;

    Sammanfattning : This thesis report on an investigation into the applicability of mid-infrared degenerate four-wave mixing (IR-DWFM) as a method to detect N\(_2\)O in ammonia flames. DFWM has previously been used for concentration measurements on other molecules, but has never, to the author's knowledge, been applied to measure N\(_2\)O in ammonia flames before. LÄS MER