Sökning: "optical trapping"

Visar resultat 1 - 5 av 10 uppsatser innehållade orden optical trapping.

  1. 1. Constructing an optical tweezers instrumentation and evaluation of trapping stiffness using the power spectrum method

    Kandidat-uppsats, Umeå universitet/Institutionen för fysik

    Författare :Haoxiang Yang; [2022]
    Nyckelord :;

    Sammanfattning : Optical tweezers can trap micron-sized objects such as cells, bacteria, and microspheres, and has become an important instrument for measuring forces associated with various physical and biological phenomena. In this thesis work, I constructed an optical tweezers instrument to trap 2µm diameter beads using a HeNe-laser operating with a wavelength of 632. LÄS MER

  3. 2. Development of Next-Generation Optical Tweezers : The New Swiss Army Knife of Biophysical and Biomechanical Research

    Master-uppsats, Umeå universitet/Institutionen för fysik

    Författare :Daniel Nilsson; [2020]
    Nyckelord :optical tweezers; optical fiber tweezers; optical fiber; optical trapping; manipulation; optical force; cell trapping; biophysical; physicochemical; biomechanical; research; next-generation; raman spectroscopy; holographic optical tweezers;

    Sammanfattning : In a time when microorganisms are controlling the world, research in biology is more relevant than ever and this requires some powerful instruments. Optical tweezers use a focused laser beam to manipulate and probe objects on the nano- and microscale. LÄS MER

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

    Kandidat-uppsats, KTH/Skolan för teknikvetenskap (SCI)

    Författare :Anton Möller; [2018]
    Nyckelord :;

    Sammanfattning : 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. LÄS MER

  5. 4. Many-body-based DFT treatment of fermions in optical lattices

    Kandidat-uppsats, Lunds universitet/Fysiska institutionen; Lunds universitet/Matematisk fysik

    Författare :Jérémie Westergren; [2017]
    Nyckelord :DFT; density functional theory; MBA; many-body approximations; Hubbard model; Ultra cold atoms; cold atoms; optical lattice; Physics and Astronomy;

    Sammanfattning : With recent advances in the field of ultra cold atoms one can, by trapping atoms at low temperatures by laser beams, simulate systems which can be adequately described by single-band lattice Hamiltonians. Also, due to the high parameter tunability of the experimental setups, lattice disorder can be introduced in a con- trolled fashion in these systems. LÄS MER

  7. 5. PLASMONIC NANOPORES: exploring new possibilities in DNA sensing and trapping

    Master-uppsats, KTH/Skolan för informations- och kommunikationsteknik (ICT)

    Författare :Francesca Nicoli; [2013]
    Nyckelord :;

    Sammanfattning : In this work we explore the new DNA sensing and trapping possibilities offered by a plasmonic nanopore. This new device combines the sensing capability of solid state nanopores with the effects arising from the collective oscillation of electrons in gold nanoparticles (plasmons). LÄS MER