Sökning: "optical limiting"

Visar resultat 31 - 35 av 77 avhandlingar innehållade orden optical limiting.

  1. 31. Multi-Photon Interactions with a Time Structure

    Författare :Alexander Baev; KTH; []
    Nyckelord :nonlinear optics; two-photon absorption; mirrorless lasing; charge-transfer chromophores; solutions; resonant photoemission; life-time vibrational interference; scattering duration time; electron Doppler effect; polymers;

    Sammanfattning : The present thesis concerns aspects of the interaction ofmatter in gas, liquid and solid phases, with electromagneticradiation, ranging from the optical to the X-ray region. Overthe last decade the availability of ultrashort strong laserpulses as well as of high power synchrotron sources of tunableX-ray radiation has stimulated a rapid development of newexperimental techniques which makes it possible to analysedifferent physical, chemical and biological processes inunprecedented detail. LÄS MER

  3. 32. Design and Numerical Modelling of Nanoplasmonic Structures at Near-Infrared for Telecom Applications

    Författare :Seyed Morteza Ebadi; Jonas Örtegren; Max Yan; Magnus Hummelgård; Carl Hägglund; Mittuniversitetet; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Surface plasmon polaritons SPPs ; resonators; photonic integrated circuits PICs ; wavelength filtering devices; MIM waveguides.; ytplasmon-polaritoner SPPs ; resonatorer; fotoniska integrerade kretsar PIC- enheter ; våglängdsfiltreringsenheter; MIM-vågledare.;

    Sammanfattning : Industrial innovation is mostly driven by miniaturization. As a result of remarkable technological advancements in the fields of equipment, materials and production processes, transistor, the fundamental active component in conventional electronics, has shrunk in size. LÄS MER

  4. 33. Fabrication and characterization of single luminescing quantum dots from 1D silicon nanostructures

    Författare :Benjamin Bruhn; Jan Linnros; Luca Dal Negro; KTH; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; silicon; quantum dot; nanocrystal; nanowire; nanostructure; photoluminescence;

    Sammanfattning : Silicon as a mono-crystalline bulk semiconductor is today the predominant material in many integrated electronic and photovoltaic applications. This has not been the case in lighting technology, since due to its indirect bandgap nature bulk silicon is an inherently poor light emitter. LÄS MER

  5. 34. Plasma assisted technology for Si-based photonic integrated circuits

    Författare :Matteo Dainese; Lars Thylén; Alfred Driessen; KTH; []
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Electrical engineering; silica-on-silicon technology; PACVD; plasma deposition; photonic integrated circuits; planar lightwave circuits; Elektroteknik; elektronik och fotonik; Electrical engineering; electronics and photonics; Elektroteknik; elektronik och fotonik;

    Sammanfattning : The last two decades have witnessed a large increase in capacity in telecommunication systems, thanks to the development of high bandwidth, fiber optic based networks. Nevertheless the continuing growth of Internet data traffic, fuelled by the development of numerous services like on-line commerce, video on demand, large audio/video files downloads, demands for a significant increase in the ability of the network nodes to manage incoming and outcoming data streams effectively and fast. LÄS MER

  7. 35. Efficient 1.3 mm GaInNAs Quantum Well Lasers for Uncooled, High Speed Operation

    Författare :Yongqiang Wei; Chalmers tekniska högskola; []
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; semiconductor laser; uncooled; temperature dependence; modulation; quantum well; molecular beam epitaxy; high speed; GaInNAs;

    Sammanfattning : The rapid expansion of tele and data transmission systems requires an ever increasing capacity in modern optical fibre communication networks. With the implementation of short distance, high density networks, such as access networks, there is a need for cost-effective optical transmitters compatible with single mode fibres. LÄS MER