laser trap


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laser trap

n.
A device that uses magnetic coils and tunable lasers to slow down atoms or particles and trap them in a confined space. A laser trap is used to form a Bose-Einstein condensate. Also called atom trap.
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"When outside forces act on the condensate, the laser trap keeps them from moving.
The UW team also designed an instrument that uses a laser trap -- akin to a microscopic tractor beam -- to "hold" a single nanocrystal surrounded by liquid in a chamber and illuminate it with the laser.
In contrast, long exposure to the laser trap is reported to have an adverse effect on sperm swimming speed and mitochondrial membrane potential due to laser-induced rise in temperature 24, 25].
To test the device, the IR laser trap holds the nanowire in position while a pattern of gold (Au) ridges (200-nm wide, 50-nm thick with decreasing pitch between each ridge) is scanned.
What is more interesting is that one can solve for the new location of the laser trap (center of the potential field) such that it would influence the particle to move in a certain direction within a specific time lapse.
When a single cell was found, the laser trap was activated and the cell was moved away from the bulk of the cells into a channel of the chamber that did not contain any cells.
The researchers measured changes in the spacing of beryllium ions confined in a laser trap at millikelvin temperatures.
The ad said the device would give drivers an extra pair of eyes and help them see speed cameras and laser trap ambushes before they got to them.
Then, with the laser trap switched off, they turned on a magnetic trap that allowed the warmer atoms to escape, taking their excess energy with them.