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Showing 1 to 20 of 52 for “"Laser cooling"”.
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Laser Cooling of Antihydrogen
… of working with trapped antimatter made laser cooling the most promising choice. I demonstrate the ability to modify the kinetic energy distribution of a trapped sample of antihydrogen using the 1S-2Pf transition in antihydrogen using a vacuum ultraviolet (VUV) laser system (i.e. laser …
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Trapping, laser cooling, and spectroscopy of Thorium IV
Application of precision laser spectroscopy and optical clock technology to the ground and metastable, first excited state of the ²²⁹Th nucleus at < 10 eV has significant potential for use in optical frequency metrology and tests of variation of fundamental constants. This work is a report on the …
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Laser cooling of solids through inelastic light scattering
Embargo set by: Seth Robbins for item 109826 Lift date: 2021-02-07T20:36:09Z Reason: Author requested U of Illinois access only (OA after 2yrs) in Vireo ETD system
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Laser cooling and spectroscopy of magnetically trapped atoms
Thesis (Ph. D.)--Massachusetts Institute of Technology, Dept. of Physics, 1991.
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Laser (Cooling) Refrigeration in Erbium Based Solid State Materials
… of erbium based solid state materials for laser refrigeration in bulk material. A great deal of work in the field has been focused on the use of ytterbium based ZBLAN glass. Some experiments have also reported cooling in thulium based solid state materials but with considerably less …
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Cryogenic optical refrigeration: Laser cooling of solids below 123 K
… recent achievements in optical refrigeration, cooling a 10% wt. Ytterbium doped Yttrium Lithium Fluoride (Yb+3:YLF) crystal via anti-Stokes fluorescence to a record low temperature ~114(+\\-1)K (below NIST-defined cryogenic 123 K) from room temperature (ΔT ~185 K) in a single stage with a …
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Laser cooling of rubidium atoms in a magneto-optical trap
… trap. After a short history of the field of laser cooling, a review of the semiclassical theory of mechanical interactions between two-level atoms and electromagnetic radiation is given. Different formulations of the semiclassical theory are discussed, including a new formulation in terms of …
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A narrow linewidth diode laser system for strontium laser cooling applications
The diode laser system for laser cooling on the 1S 0 → 3P1 intercombination line of strontium discussed in this thesis allows us to cool and trap an atomic strontium sample to 15 muK. Samples in this temperature range are useful for the development of the next generation of atomic frequency …
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Precise Characterization and Investigation of Laser Cooling in III-V Compound Semiconductors
… physics and engineering issues associated with laser cooling of III-V compound semiconductors, in particular GaAs double heterostructures (DHS), are theoretically and experimentally investigated. This research addresses the key concepts of external quantum efficiency (EQE) and parasitic …
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Laser cooling of fast stored ion beams to extreme phase-space densities
… thesis presents experiments on efficient laser cooling of fast stored 9Be+ ions to extreme phase-space densities. The dynamics of bunched cooling in different potentials and the important role of intra beam Coulomb scattering have been investigated on the basis of systematic measurements …
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Trapping and Laser Cooling an Ensemble of Ytterbium-171 Atoms for use in an Atomic Clock
… ensure homogeneous interactions with the clock laser. We demonstrate loading and laser cooling of an ensemble of ytterbium-171 atoms in a 2D optical dipole trap created by an optical cavity. Our loading method ensures that all atoms are located in the intersection of 2 perpendicular dipole traps …
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Characterisation of grating properties for MOTs at multiple wavelengths and laser cooling Rb on the 5S1/2 - 6P3/2 transition at 420nm
… diffraction grating, a 780nm and a 420nm laser. Taking advantage of the narrower line width of the 6P3/2 state, 420nm lasers can theoretically make a factor of 10 colder MOT than those using 780nm ones based on the Doppler limit. However, considering the low capture rate caused by this …
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Progress Towards a Spinor Bose-Einstein Condensate Machine
Laser cooling and trapping of neutral particles has become a major area of research in atomic physics with the discovery of the first Bose-Einstein condensates (BECs) in 1995. These ultracold atomic vapors allow for study of fundamental quantum electromagnetic properties of atoms that are otherwise …
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Optical cooling using the dipole force
The term 'laser cooling' is applied to the use of optical means to cool the motional energies of either atoms and molecules, or micromirrors. In the literature, these two strands are kept largely separate; both, however suffer from severe limitations. Laser cooling of atoms and molecules largely …
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Synthesis and evaluation of rare-earth doped glasses and crystals for optical refrigeration
… rare-earth doped, solid-state materials for laser cooling. In particular, the work targeted the optimization of the laser-cooling efficiency in Yb3+ and Tm3+ doped fluorides. The first instance of laser-induced cooling in a Tm3+-doped crystal, BaY2F8 was reported. Cooling by 3 degrees Kelvin …
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Simultaneous cooling and trapping of 6Li and 85/87Rb
This thesis provides a summary of the laser system constructed in the Quantum Degenerate Gases Laboratory for laser cooling and trapping of 85/87Rband 6Li as well as of experiments that have been pursued in our lab to date. The first chapter provides an overview of the experimental focus of the QDG …
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Bose-Fermi mixtures of ultracold gases of dysprosium
Laser cooling and trapping of the most magnetic fermionic atom, dysprosium (Dy), may provide a framework to explore quantum liquid crystal (QLC) theory (Chapter 1). This thesis presents details of the Dy laser cooling and trapping apparatus including the laser systems at 421, 741, and 1064 nm, the …
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High-power deep-UV laser for improved and novel experiments on hydrogen
… of a novel, high-power coherent 243.1 nm laser system, and through simulations, its ability to trap hydrogen in a magic wavelength optical trap. This wavelength of light is necessary to address the 1S–2S two-photon transition in hydrogen, and the primary motivation behind development of …
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Atomic beam techniques in a rubidium vapour cell
… velocity class travelling between two separated laser beams. This represents a new spectroscopic technique, the usefulness of which has been demonstrated through its applications. In the present work, the vapour cell atomic beam has been used to measure Larmor precession of polarised atoms in a …
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461nm laser for studies in ultracold neutral strontium
A 461 nm laser was constructed for the purposes of studying ultracold neutral strontium. The dipole-allowed 1 S0 → 1P1 transition at 460.862 nm can be used in laser cooling and trapping; optical imaging, Zeeman slowing, and photoassociative spectroscopy. We produce light at this wavelength by …
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