Search for dissertations about: "light-matter coherence"

Showing result 1 - 5 of 8 swedish dissertations containing the words light-matter coherence.

2. 1. Slow and stopped light by light-matter coherence control

   Author : Jonas Tidström; Lars Thylén; Mauritz Andersson; Jesper Mørk; KTH; []
   Keywords : NATURVETENSKAP; NATURAL SCIENCES; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; slow light; stored light; stopped light; light-matter coherence; electromagnetically induced transparency; rubidium atoms; Physics; Fysik; Photonics; Fotonik;

   Abstract : In this thesis we study light-matter coherence phenomena related to the interaction of a coherent laser field and the so-called Λ-system, a three-level quantum system (e.g., an atom). We observe electromagnetically induced transparency (EIT), slow and stored light in hot rubidium vapor. READ MORE

4. 2. Light-Matter Interaction and Quantum Computing in Rare-Earth-Ion-Doped Crystals

   Author : Adam Kinos; Atomfysik; []
   Keywords : NATURVETENSKAP; NATURAL SCIENCES; Rare-Earth-Ion-Doped Crystals; Quantum Computing; Light-Matter Interaction; Fysicumarkivet A:2018:Kinos;

   Abstract : In this thesis, crystals of yttrium orthosilicate (Y2SiO5) that are randomly doped with another rare-earth element, such as praseodymium (Pr), europium (Eu), or cerium (Ce), are investigated with lasers locked to ultra-stable cavities using the Pound-Drever-Hall locking technique. Many of these rare-earth elements have long-lived 4f-4f transitions, hundreds of microseconds to a few milliseconds, with even longer ground hyperfine lifetimes of up to several days. READ MORE

5. 3. Investigations of Strong Light-Matter Interactions in Nanophotonic Systems

   Author : Michael Stührenberg; Chalmers tekniska högskola; []
   Keywords : NATURVETENSKAP; NATURAL SCIENCES; NATURVETENSKAP; NATURAL SCIENCES; NATURVETENSKAP; NATURAL SCIENCES; photoluminescence; strong coupling; localized surface plasmon resonance; bipyramids;

   Abstract : Noble metal nanoparticles can support localized surface plasmon resonances (LSPR), thus behaving as open optical resonators. Outstanding optical properties as well as a subwavelength mode volume make plasmonic nanoparticles a promising platform for enhanced light-matter interactions. READ MORE

6. 4. Quantum Coherence for Light Harvesting

   Author : David Palecek; Kemisk fysik; []
   Keywords : NATURVETENSKAP; NATURAL SCIENCES; Coherent two-dimensional spectroscopy; Quantum coherence; Light harvesting; Photosynthetic reaction center; Energy transfer;

   Abstract : Almost all life on Earth depends on the products of photosynthesis — the biochemical process whereby solar energy is stored as chemical-rich compounds. The energy of captured photons is transferred through a network of pigment-protein complexes towards the reaction center. READ MORE

7. 5. Quantum memory development and new slow light applications in rare-earth-ion-doped crystals

   Author : Qian Li; Atomfysik; []
   Keywords : NATURVETENSKAP; NATURAL SCIENCES; Quantum memories; Slow light; Rare-earth-ion-doped crystals; Light-Matter Interaction; Fysicumarkivet A:2018:Li;

   Abstract : When doped into solid state transparent crystals, rare-earth ions can have optically excited states with milliseconds coherence time and up to six hours coherence time for hyperfine levels after being cooled down to liquid helium temperature. This long coherence property makes them unique as solid state material and attractive for quantum information applications. READ MORE