Biomedical subjects

M Saffman

Publications and source records attributed to M Saffman.

9 recordsLinked to original sources

PubMed2006

Fast ground state manipulation of neutral atoms in microscopic optical traps.

We demonstrate Rabi flopping at MHz rates between ground hyperfine states of neutral 87Rb atoms that are trapped in two micron sized optical traps. Using tightly focused laser beams we demonstrate high fidelity, site specific Rabi rotations with cross talk on neighboring sites separated by 8 microm at the level of 10(-3). Ramsey spectroscopy is used to measure a dephasing time of 870 micros, which is approximately 5000 longer than the time for a pi/2 pulse.

Journal Article↗

PubMed2003

Observation of spatial modulation instability in intracavity second-harmonic generation.

We report the observation of spatial instabilities in singly resonant intracavity second-harmonic generation. Self-focusing as well as spatially ordered near- and far-field structures are observed. Experimental results are compared with mean-field analysis as well as three-dimensional numerical simulations.

Journal Article↗

PubMed2000

Spiral intensity patterns in the internally pumped optical parametric oscillator

We describe a nonlinear optical system that supports spiral pattern solutions in the field intensity. This new spatial structure is found to bifurcate above a secondary instability in the internally pumped optical parametric oscillator. The analytical predictions of threshold and spatial scale for the instability are supplemented by detailed numerical investigations of the formation of spiral patterns.

Journal Article↗

PubMed2000

Collapse in a forced three-dimensional nonlinear Schrodinger equation

We derive sufficient conditions for the occurrence of collapse in a forced three-dimensional nonlinear Schrodinger equation without dissipation. Numerical studies continue the results to the case of finite dissipation.

Journal Article↗

PubMed1996