Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
Results
Showing 1 to 20 of 42 for “"Magneto-optical trap"”.
-
Laser cooling of rubidium atoms in a magneto-optical trap
… reference to rubidium atoms confined in a magneto-optical 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 …
-
A chirped, pulsed laser system and magneto-optical trap for rubidium
… the construction and characterisation of a magneto-optical trap (MOT) for 85Rb from the very beginning. It details both the optical and mechanical aspects from laser diode assembly, tuning and stabilisation to the preparation and assembly of the vacuum system. The MOT construction forms the …
-
Experimental Investigation of a Rubidium-Argon Dual Species Magneto-Optical Trap
… opposite sides of the periodic table in a dual magneto optical trap (DMOT) has been accomplished. The alkali-metal <sup>85</sup>Rb and the noble gas <sup>40</sup>Ar* have been simultaneously confined, characterized, and interspecies interaction parameters have been measured. The DMOT confined …
-
Characterization of Magneto-optical Trap For Experiments in Light-Atom Interfacing
… of atomic cloud density and temperature in a magneto-optical trap (MOT). The purpose is to find the method in obtaining the densest and coldest cloud the setup can produce. In steady state trap, the highest atomic density possible is that of a cloud in multiple scattering regime where a …
-
Photoassociative Spectroscopy of Ultracold Argon and Krypton Confined in a Magneto Optical Trap
… cool and confine the atoms and is known as the “trapping transition.” Spectroscopy near the trapping transition in argon was studied previously in our group [1] and specific features were observed in the spectrum. At the time, the features were not definitively identified, but more than one …
-
Characterization of a two-color magneto-optical trap for a spin-squeezed optical lattice clock
We experimentally realize a magneto-optical trap (MOT) for ytterbium that simultaneously scatters light from two atomic transitions, in order to reduce the minimum magnetic field gradient required for trapping atoms. From the experimental data, we propose a model of the MOT where one transition is …
-
Towards a quantum gas microscope for fermionic atoms
… of a laser system capable of cooling and trapping gaseous lithium-6 atoms in a 3D Magneto-Optical Trap. Second, we discuss the realization of a 2D Magneto-Optical Trap which, in our experiment, acts as a high-flux source of cold potassium-40 atoms. These two systems are critical first …
-
Surface trap for ytterbium ions
… an experiment to load a shallow planar ion trap from a cold atom source of Ytterbium using photoionization. The surface trap consisted of a three-rod radio frequency Paul trap fabricated using standard printed circuit board techniques. The cold atom source was an isotope-selective …
-
Loading a planar RF Paul Trap from a cold Yb⁺ source
… planar radio frequency, three-rod Paul Trap, loaded with Yb+ ions that have been photoionized from a source of neutral atoms, which were cooled in a magneto-optical trap. Planar ion traps have only recently been successfully loaded[1], and never from a cold ion source. Additionally, …
-
Trapping cold rubidium in a fiber
… of loading cold ⁸⁷Rb into a red-detuned optical dipole trap within a hollow core photonic fiber. This confines the atoms to 6 microns in two dimensions. We initially cooled the Rubidium in a magneto-optical trap. The great confinement of the Rubidium allows for increased optical depths …
-
Loading rubidium atoms into a hollow core fiber
We demonstrate a procedure for cooling, trapping, and transferring rubidium atoms into a hollow core photonic band gap fiber. The atoms are first collected in a magneto-optical trap (MOT) and then cooled using polarization gradient cooling. Magnetic traps are then used to confine and transfer the …
-
Study of low energy Ytterbium atom-ion charge transfer collisions using a surface-electrode trap
… the 172yb+ ions in the surface-electrode trap and 174Yb atoms in the magneto-optical trap, and measuring ion loss. We confirm that, in the Langevin regime, the charge transfer collisional rate is independent of the collisional energy. The measured Langevin cross section is consistent with …
-
Photoassociative Spectroscopy of Ultracold Metastable Argon and Study of Dual Species Trap Loss in a Rubidium-Metastable Argon MOT
… molecular physics: The study of the dual species trap loss in a rubidium - metastable argon magneto-optical trap and the photoassociative spectroscopy of ultracold metastable argon. The interspecies trap loss rate coefficients have been measured for ultracold collisions between <sup>85</sup>Rb and …
-
Coherent matter waves near surfaces
Neutral atoms can be trapped and manipulated on microscopic scales near surfaces of atom chips. The work covered by this thesis includes the development and test of microscopic atom optical tools. An omni-directional magnetic matter wave guide and novel types of magneto-electric trapping potentials …
-
Optical imaging of Rydberg atoms
… (EIT) in Rydberg atoms in order to observe optical nonlinearities at the single photon level. ⁸⁷Rb atoms are trapped and cooled using a magneto-optical trap (MOT) and a far off resonance dipole trap (FORT). Once the system is prepared, a ladder EIT scheme with Rydberg atoms is used to map …
-
Two-Photon Ionization of the Calcium 4S3D 1D2 Level in an Optical Dipole Trap
This thesis reports an optical dipole trap for atomic calcium. The dipole trap is loaded from a magneto-optical trap (MOT) of calcium atoms cooled near the Doppler limit (~1 mK). The dipole trap is formed by a large-frame argon ion laser focused to 20 microns into the center of the MOT. This laser …
-
Optical manipulation of helium(2(3)S) atoms with a diode laser
… atomic beam of He(2$\sp3$S) metastable atoms by optical pumping on the $\rm 2\sp3S\sb1\rightarrow2\sp3P\sb1$ (D1) transition. The diode laser is an InGaAs/GaAs strained multiquantum well with a distributed Bragg reflector to insure single longitudinal mode operation. The laser has been frequency …
-
Building an apparatus for ultracold lithium-potassium Fermi-Fermi mixtures
… I designed and built laser systems to cool, trap and image lithium-6 and potassium-40 atoms. I also constructed the vacuum system for the experiment and experimentally tested a new method to coat the chamber with a Titanium-Zirconium- Vanadium alloy that acts as a pump. The final apparatus …
-
One-dimensional Bose-Einstein condensates in micro-traps
A novel wire-based magneto-optical trap has been demonstrated which enables to collect up to 3x10^8 cold atoms close to the reflecting surface of an atom chip. These atoms are subsequently transferred to micro-traps generated by wires mounted on the atom chip and Bose-Einstein condensation has been …
-
Micro-fabricated diffractive optics for quantum sensors and atomic clocks
… performance in a cold-atom system. The grating magneto-optical trap (GMOT) demonstrates an atom number and temperature competitive with state-of-the-art experiments, while greatly simplifying the optical footprint. The compact nature of the GMOT facilitates proof-of-principle quantum sensing for …
Page 1 of 3