Single Ion Trapped in a Semiconductor Chip

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Single Ion Trapped in a Semiconductor Chip
Micrograph of 28-electrode ion trap structure
(above), with closeup of cantilevered electrodes
having 4 mm vertical gap (below)
1 cm2 chip carrier with GaAs chip attached
Image of single Cd ion confined in GaAs
microtrap. Laser light scattering off electrodes
visible