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High-resolution spectroscopy with laser-cooled and trapped calcium atoms

Th. Kisters, K. Zeiske, F. Riehle +1 more

Applied Physics BAug 1, 199484 citations

Spectroscopy of Cold, Trapped Atoms

Tomasz Brzozowski, Maria Brzozowska, Jerzy Zachorowski +1 more

Acta Physica Hungarica A) Heavy Ion PhysicsNov 1, 20063 citations

Photoassociative ionization spectroscopy in ultracold sodium

Paul D. Lett, L. P. Ratliff, Mark E. Wagshul +2 more

Recent advances in laser cooling techniques have made possible a new type of spectroscopy. In the first experiments of this kind alkali atoms are laser cooled to temperatures around 1 mK and trapped, using laser fields, at densities around 1011 cm−3. Atoms colliding under such ultracold conditions can be resonantly photoassociated to bound states of the dimer molecules. These molecules can in turn be photoionized, providing a sensitive detection of the photoassociation spectrum and revealing in extremely high resolution the structure of the dimer molecules. The particular advantages of this technique include high resolution and signal‐to‐noise and the ability to reach extremely long range states of the molecule, accessible only through such slow collisions.Recent advances in laser cooling techniques have made possible a new type of spectroscopy. In the first experiments of this kind alkali atoms are laser cooled to temperatures around 1 mK and trapped, using laser fields, at densities around 1011 cm−3. Atoms colliding under such ultracold conditions can be resonantly photoassociated to bound states of the dimer molecules. These molecules can in turn be photoionized, providing a sensitive detection of the photoassociation spectrum and revealing in extremely high resolution the structure of the dimer molecules. The particular advantages of this technique include high resolution and signal‐to‐noise and the ability to reach extremely long range states of the molecule, accessible only through such slow collisions.

AIP conference proceedingsJan 1, 19951 citation

Optical spectroscopy of trapped neutral atoms

C. Gabbanini

Rivista Del Nuovo CimentoDec 1, 19973 citations

High-resolution coherent population trapping in sodium vapor

Koji Motomura, M. Fuchigami, Masaharu Mitsunaga

Coherent population trapping signals were observed in Na vapor in a simple configuration of a single laser source with a frequency-swept double-pass acousto-optic modulator. This technique enabled high-resolution hyperfine Zeeman spectroscopy of Na atoms.

Conference on Lasers and Electro-Optics Pacific Rim (CLEO-PR)Nov 13, 20020 citations

High Precision Spectroscopy of Strontium in an Optical Lattice: Towards a New Standard for Frequency and Time

Martin M. Boyd

Clocks based on optical transitions in ions and atoms are quickly moving to the forefront of the frequency standards field mainly because of the high spec-tral resolution, and therefore the potential stability and accuracy, which can be achieved. In this thesis a new optical clock based on neutral atoms trapped in an optical lattice is presented, demonstrating spectroscopy of the clock transition free of any lineshape or accuracy degradation due to atomic motion. The system simu-lates a single trapped ion clock, but allows use of thousands of atoms for improved signal to noise ratio, and clock stability. High accuracy can also be achieved as the lattice can be designed to shift the energy of the two atomic clock states equally, such that the transition frequency is unchanged. Strontium is a natural candidate for such a clock as it offers an extremely narrow optical transition (∼1 mHz) based on atomic states which are very insensitive to external fields. The strontium level structure allows efficient laser cooling to 1 µK with diode laser sources, and a con-venient wavelength of 813 nm for the zero-differential Stark shift optical lattice. The strontium lattice clock system has allowed observation of high signal-to-noiseClocks based on optical transitions in ions and atoms are quickly moving to the forefront of the frequency standards field mainly because of the high spec-tral resolution, and therefore the potential stability and accuracy, which can be achieved. In this thesis a new optical clock based on neutral atoms trapped in an optical lattice is presented, demonstrating spectroscopy of the clock transition free of any lineshape or accuracy degradation due to atomic motion. The system simu-lates a single trapped ion clock, but allows use of thousands of atoms for improved signal to noise ratio, and clock stability. High accuracy can also be achieved as the lattice can be designed to shift the energy of the two atomic clock states equally, such that the transition frequency is unchanged. Strontium is a natural candidate for such a clock as it offers an extremely narrow optical transition (∼1 mHz) based on atomic states which are very insensitive to external fields. The strontium level structure allows efficient laser cooling to 1 µK with diode laser sources, and a con-venient wavelength of 813 nm for the zero-differential Stark shift optical lattice. The strontium lattice clock system has allowed observation of high signal-to-noise

Jan 1, 200736 citations

High-resolution spectroscopy on laser-trapped atoms: signal-to-noise analysis

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