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Search Publications by: Jabez J McClelland (Fed)

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Displaying 101 - 125 of 276

Laser Cooling Transitions in Atomic Erbium

April 18, 2005
Author(s)
H Ban, M Jacka, James L. Hanssen, Joseph Reader, Jabez J. McClelland
We discuss laser cooling opportunities in atomic erbium, identifying five J rarr} J + 1 transitions from the 4f 126s 2 3H 6 ground state that are accessible to common visible and near-infrared continuous-wave tunable lasers. We present lifetime

Nanotechnology with Atom Optics

November 1, 2004
Author(s)
Jabez J. McClelland, Shannon B. Hill, M Pichler, Robert Celotta
A brief review of atom optics is presented, with emphasis on how it can be applied in the field of nanotechnology. Two specific examples are discussed: laser-focused atomic deposition and deterministic production of single atoms. Results are summarized for

A chromium surface magneto-optical trap for magnetic microtrap studies

May 1, 2004
Author(s)
M Pichler, S Hill, Jabez J. McClelland
A surface magneto-optical trap for chromium atoms is demonstrated as a first step toward loading atoms into microscopic magnetic traps. Characteristics of the trap and transfer to microscopic magnetic traps will be discussed.

A Fast, Deterministic Source of Single Cr Atoms

June 1, 2003
Author(s)
Jabez J. McClelland, Shannon B. Hill
We produce single Cr atoms on demand by feedback control of loading and loss from a magneto-optical trap. We observe single-atom occupation probabilities of over 98% and efficient ejection at rates up to 10 Hz.

Atoms on Demand: Fast, Deterministic Production of Single Cr Atoms

May 5, 2003
Author(s)
S Hill, Jabez J. McClelland
We have realized a method for producing single Cr atoms on demand by suppressing the stochastic nature of the loading and loss processes of a magneto-optic trap. We observe single-atom trap occupation probabilities as high as (98.7 plus or minus} 0.1)% and

Accuracy of Nanoscale Pitch Standards Fabricated by Laser-Focused Atomic Deposition

March 1, 2003
Author(s)
Jabez J. McClelland, W Anderson, C Bradley, M Walkiewicz, R Deslattes, E Jurdik, Robert Celotta
The pitch accuracy of a grating formed by laser-focused atomic deposition is evaluated from the point of view of fabricating nanoscale pitch standard artifacts. The average pitch obtained by the process, nominally half the laser wavelength, is simply

Laser-Focused Nanofabrication: Beating of Two Atomic Resonances

June 10, 2002
Author(s)
E Jurdik, K van, J Hohlfeld, T Rasing, Jabez J. McClelland
We deposit a laser-collimated chromium beam onto a substrate through a laser standing-wave (SW) tuned above the atomic resonance at either of the two 52Cr transitions 7S 3rarr} 7P° 3 at 427.600 nm or 7S 3rarr} 7P° 4 at 425.553 nm. In both these cases the

Laser-Focused Atomic Deposition - Nanofabrication via Atom Optics

May 15, 2000
Author(s)
Jabez J. McClelland, Robert Celotta
In conventional molecular-beam epitaxy, atoms from a diffuse source randomly impinge upon a surface, accumulating in atomic layers or islands. We have recently demonstrated an enhancement of this process, in which the trajectories of the atoms are

Magneto-Optical Trapping of Chromium Atoms

May 1, 2000
Author(s)
C Bradley, Jabez J. McClelland, W Anderson, Robert Celotta
We have constructed a magneto-optical trap for chromium atoms. Using trapping light at 425 nm and two repumping lasers tuned to intercombination transitions, over 10 6 atoms were trapped and average densities of over 10 16 m -3 were obtained. Non

Nanofabrication via Atom Optics

January 1, 2000
Author(s)
Jabez J. McClelland
A review is given of the field of nanofabrication via atom optics. Discussion is presented of the fundamentals of atom manipulation and atom optics, with emphasis on the aspects that are, or might be, useful for nanofabrication. The current status of

Surface Growth in Laser-Focused Atomic Deposition

July 15, 1999
Author(s)
E Jurdik, T Rasing, K van, C Bradley, Jabez J. McClelland
We present calculations of surface growth in laser-focused nanostructure fabrication. We show that theoretical predictions of the structure profile s shape depend sensitively on the model used to describe the growth, and also on the parameters chosen