Sökning: "light-emission"

Visar resultat 21 - 25 av 49 avhandlingar innehållade ordet light-emission.

  1. 21. Polymer Components for Photonic Integrated Circuits

    Författare :Aleksandrs Marinins; Sergei Popov; Leif Katsuo Oxenlowe; KTH; []
    Nyckelord :integrated photonics; polymers; optical communications; microfabrication; optical waveguides; microring resonators; silicon; Si nanocrystals; photoluminescence; Fysik; Physics;

    Sammanfattning : Optical polymers are a subject of research and industry implementation for many decades. Optical polymers are inexpensive, easy to process and flexible enough to meet a broad range of application-specific requirements. These advantages allow a development of cost-efficient polymer photonic integrated circuits for on-chip optical communications. LÄS MER

  3. 22. Optical and Structural Characterization of GaN Based Hybrid Structures and Nanorods

    Författare :Mathias Forsberg; Galia Pozina; Ching-Lien Hsiao; Oleksandr Plashkevych; Linköpings universitet; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES;

    Sammanfattning : GaN belongs to the group III nitrides and is today the material of choice for efficient blue light emission, enabling solid state white lighting by combining red, blue and green light emitting diodes (LED) or by having a blue LED illuminating a phosphor. By combining GaN quantum well (QW) structures with colloids, nanoparticles or polyfluorene films, LEDs may be fabricate at lower cost. LÄS MER

  4. 23. Time-resolved plasmonics in designed nanostructures

    Författare :Eleonora Lorek; Atomfysik; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Plasmon; Nanostructure fabrication; High-order harmonic generation; Photoemission electron microscopy; Focused ion beam; Fysicumarkivet A:2016:Lorek;

    Sammanfattning : A metal nanoparticle can be considered as consisting of a base of positive ion cores and a sea of free electrons. When the free electrons are displaced, for example, by an incident electric field, a restoring force acts on the electrons. The electrons may then oscillate back and forth until equilibrium is reached. LÄS MER

  5. 24. Design and Characterization of 1.3-1.6 µm Metamorphic Materials and Lasers on GaAs

    Författare :Ivar Tångring; Chalmers tekniska högskola; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Semiconductor laser; molecular beam epitaxy; InGaAs quantum well; graded buffer layer; metamorphic heterostructures;

    Sammanfattning : The development of fiber-optical networks for broad-band access is expected to create a huge market for laser transmitters in the 1.3-1.55 µm wavelength range. The existing InP-based lasers have poor temperature stability. LÄS MER

  7. 25. Enhancing the performance of the Digital Cherenkov Viewing Device : Detecting partial defects in irradiated nuclear fuel assemblies using Cherenkov light

    Författare :Erik Branger; Sophie Grape; Christopher Orton; Uppsala universitet; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; DCVD; Nuclear safeguards; Cherenkov light; Nuclear fuel assembly; Partial defect verification; Fysik med inriktning mot tillämpad kärnfysik; Physics with specialization in Applied Nuclear Physics;

    Sammanfattning : The Digital Cherenkov Viewing Device (DCVD) is an instrument used by authority safeguards inspectors to verify irradiated nuclear fuel assemblies in wet storage based on Cherenkov light emission. It is frequently used to verify that parts of an assembly have not been diverted, which is done by comparing the measured Cherenkov light intensity to a predicted one. LÄS MER