Search for dissertations about: "near-field optics"

Showing result 1 - 5 of 14 swedish dissertations containing the words near-field optics.

  1. 1. Near-Field Radiative Heat Transfer between Plasmonic Nanostructures

    University dissertation from Stockholm : KTH Royal Institute of Technology

    Author : Jin Dai; KTH.; [2016]
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; NATURVETENSKAP; NATURAL SCIENCES; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Physics; Fysik; Energiteknik; Energy Technology;

    Abstract : Radiative heat transfer (RHT) due to coupled electromagnetic near field scan significantly exceed that dictated by Planck’s law. Understanding such phenomenon is not only of fundamental scientific interest, but also relevant to a broad range of applications especially connected to nanotechnologies. READ MORE

  2. 2. Photonic terahertz-wave generation, radiation and quasioptical integration

    University dissertation from Stockholm : KTH Royal Institute of Technology

    Author : Biddut Kumar Banik; [2007]
    Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; semiconductor device modelling; semiconductor diodes; III-V semiconductors; Catadioptric lens; imaging; dipole antennas; slot antennas; lens antennas; semiconductor heterojunctions; dielectric loaded antennas; optical mixers; photomixers; near-field imaging; computer aided engineering; indium compounds; millimetre wave imaging; near-field optics; submillimeter wave generation; photodiodes; terahertz sources; millimetre wave generation; submillimetre wave integrated circuits; microwave imaging; uni-travelling-carrier photodiodes;

    Abstract : This thesis deals with the uni-travelling-carrier photodiode (UTC-PD) based photonic generation of terahertz waves, antenna designs for the terahertz radiation and a novelcatadioptric lens for quasioptical integration.The ongoing and accomplished research work on the UTC-PD, its limitations and optimisation scopes for attaining higher bandwidth and higher output power have been discussed. READ MORE

  3. 3. New laser-based techniques for nanometre lithography and microscopy

    University dissertation from Stockholm : KTH Royal Institute of Technology

    Author : Lars Malmqvist; [1996]
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; Microscopy; near-field; frequency doubling; optical trapping; laser plasma; Atomic and molecular physics; low debris; Fysicumarkivet A:1996:Malmqvist; X-ray lithography; Atom- och molekylärfysik;

    Abstract : This thesis describes the development of new laser-based techniques for nanometre lithography and microscopy. The potential of a non-intrusive scanned near-field optical microscope (SNOM) has been investigated. The probe consists of an optically trapped microscopic particle which is scanned in proximity to the object to be studied. READ MORE

  4. 4. Optical properties and degradation of deep ultraviolet AIGaN-based light-emitting diodes

    University dissertation from Stockholm : KTH Royal Institute of Technology

    Author : Andrea Pinos; KTH.; [2011]
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; AIGaN; deep-UV LEDs; polarization fields; screening; exciton binding energy; alloy fluctuations; near-field microscopy; carrier dynamics; LED aging; NATURAL SCIENCES Physics Other physics Optics; NATURVETENSKAP Fysik Övrig fysik Optik;

    Abstract : .... READ MORE

  5. 5. Localization effects in ternary nitride semiconductors

    University dissertation from Stockholm : KTH Royal Institute of Technology

    Author : Vytautas Liuolia; KTH.; [2012]
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; NATURVETENSKAP; NATURAL SCIENCES; AlGaN; InGaN; AlInN; LEDs; near-field microscopy; carrier dynamics; alloy fluctuations; carrier localization; built-in electric field; nonpolar planes; polarized luminescence;

    Abstract : InGaN based blue and near-ultraviolet light emitting diodes and laser diodes have been successfully commercialized for many applications such as general lighting, display backlighting and high density optical storage devices. Despite having a comparably high defect density, these devices are known for their efficient operation, which is attributed to localization in potential fluctuations preventing carriers from reaching the centers of nonradiative recombination. READ MORE