Essays about: "ljus intensitet"

Showing result 6 - 10 of 24 essays containing the words ljus intensitet.

  1. 6. Vem släcker stjärnorna? : en sammanställning över det artificiella ljusets påverkan i den urbana kontexten från en landskapsarkitekts perspektiv

    University essay from SLU/Dept. of Landscape Architecture, Planning and Management (from 130101)

    Author : Kajsa Andén; [2020]
    Keywords : ljusförorening; artificiellt ljus; sky glow; hållbar belysning; mörker; urban planering; belysnings strategier; ekosystemtjänster; biologiska system;

    Abstract : Ljusföroreningar innebär det artificiella ljusets negativa påverkan på miljön. Denna påverkan uppmärksammas allt mer i dagens samhälle där belysningen av staden tenderar att bli allt aggressivare mot det naturliga mörkret. Det artificiella ljuset påverkar människor och djurens biologiska system. READ MORE

  3. 7. Manipulation and application of laser light using spatial light modulation

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

    Author : Albin Hedse; [2020]
    Keywords : spatial light modulation; wavefront correction; high harmonic generation; harmonic divergence; Physics and Astronomy;

    Abstract : Attosecond pulses obtained via high harmonic generation often suffer from chromatic aberration. This is inherent from the generation process as a consequence of the spatial profile of the driving laser pulses. READ MORE

  4. 8. Optical forces from dielectric slot waveguides on dielectric nanoparticles

    University essay from KTH/Skolan för teknikvetenskap (SCI)

    Author : Anton Möller; [2018]
    Keywords : ;

    Abstract : Trapping and modulating the physical whereabouts of particles are in great interest for numerous areas of applications. Traditionally, this type of control is achieved with free space optical tweezers, but they do present several problems. READ MORE

  5. 9. Transient Plasma Photonic Crystals - A Route Towards Slow Ultra-intense Light?

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

    Author : Robin Weissenbilder; [2018]
    Keywords : slow; light; plasma; photonic; crystal; transient; ultra-intense; short; pulse; laser; Physics and Astronomy;

    Abstract : Periodic electron and ion density modulations in near critical density plasmas induced by counterpropagating femtosecond pulses of intensities on the order of 10¹⁵ to 10¹⁶ Wcm⁻² are described in a linear and stationary regime and investigated using particle-in-cell simulations in one and two dimensions. The periodic gratings produce transient plasma photonic crystals lasting up to several picoseconds with ultra-wide angle-selective band gaps on the order of Δω/ω₀ ≈ 10-20%. READ MORE

  6. 10. Dependency of high-order harmonics to polarisation properties of many-cycle driving fields

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

    Author : Timothé Ramboazanaka; [2018]
    Keywords : Atomic physics; attosecond pulses; high-order harmonic generation; polarisation; polarisation state; electron wave packet trajectory; three-step model; time-dependent schrödinger equation; TDSE; two-colour; selection rules; symmetry; conservation laws; Physics and Astronomy;

    Abstract : Light-matter interactions can be used to probe both light and matter as they yield information on a system's state. On the ultrafast timescale, it is possible to employ these interactions to probe fast-occurring phenomena. READ MORE