Sökning: "THz"

Visar resultat 21 - 25 av 27 uppsatser innehållade ordet THz.

  1. 21. Characterization of Terahertz Radiation Generated in an Organic Crystal

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

    Författare :Åsa Bengtsson; [2016]
    Nyckelord :Nonlinear optics; Terahertz radiation generation; Optical rectification; Difference frequency generation; Organic crystal; DSTMS; Physics and Astronomy;

    Sammanfattning : The terahertz region of the electromagnetic spectrum is an important research area allowing insights into fundamental science such as inter-molecular interactions, and with applications in the environmental, medical and security field. Using femtosecond lasers, it is possible to design compact and efficient terahertz generation schemes, resulting in few-cycle broadband pulses. LÄS MER

  3. 22. Generation of Short Intense Terahertz pulses Through Optical Rectification

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

    Författare :Carl Ekström; [2015]
    Nyckelord :Terahertz; THz; Optical Rectification; OR; Photonics; Optics; LiNbO3; Physics and Astronomy; Technology and Engineering;

    Sammanfattning : The lack of sources that generates intense THz pulses have in many years limited the field of THz science. Until recently intense THz pulses have been hard to generate using nonlinear crystals such as Lithium Niobate (LiNbO3) with high efficiency. LÄS MER

  4. 23. Characterization of a Zeeman Slower Designed for a 87 Sr Optical Clock

    Kandidat-uppsats, Lunds universitet/Fysiska institutionen; Lunds universitet/Synkrotronljusfysik

    Författare :Jonas Olsson; [2015]
    Nyckelord :metrology; time; frequency; atomic clock; optical clock; strontium; frequency comb; zeeman slower; arduino; Physics and Astronomy;

    Sammanfattning : Optical clocks will potentially become the new frequency standard for the SI-definition of the second. Many national metrology institutes around the world have already implemented different versions of such clocks and others are in process of doing so. At SP Technical Research Institute of Sweden, this process has recently begun. LÄS MER

  5. 24. Fabrication and Characterization of Tunneling Oxides on Graphene

    Master-uppsats, KTH/Mikroelektronik och tillämpad fysik, MAP

    Författare :Melkamu Belete; [2013]
    Nyckelord :;

    Sammanfattning : Graphene base transistors (GBTs) are known to be novel devices mingling outstanding properties of graphene, with the concept of hot electron transistors (HETs). According to theoretical calculations, GBTs were predicted to have over 5 orders of magnitude ON/OFF current ratios and THz frequency range operations. LÄS MER

  7. 25. Planar Antennas for Terahertz Detectors

    Master-uppsats, Avdelningen för elektronik, matematik och naturvetenskap

    Författare :Zakir Hossain; [2012]
    Nyckelord :;

    Sammanfattning : The use of the millimeter-wave and terahertz (THz) systems are becoming very important in various scientific and military applications. In many applications i.e. radio-astronomy, THz imaging, remote sensing, secure communication links, THz radars, plasma diagnostics etc. LÄS MER