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Quantum Engineering

LDRD
LDRD Program

 

Microfabricated Ion Traps

Integration of Fluorescence Collection Optics with a Microfabricated Surface Electrode Ion Trap

Completed ion trap with optics integrated
Completed ion trap with optics integrated.

Detail of fiber/chip assembly in chamber.
Detail of fiber/chip assembly in chamber.

 

The efficient collection of fluorescence photons from a single ion is an essential ingredient for trapped ion-based quantum information processing.

We have successfully demonstrated an integrated optical system for collecting the fluorescence from a trapped ion.  The system, consisting of an array of transmissive, dielectric micro-optics and an optical fiber array, has been intimately incorporated into the ion trapping chip without negatively impacting trapping performance. 

Considerations such as our choice of epoxies, vacuum feedthrough, and optical component materials did not degrade the vacuum environment, and we have demonstrated light detection as well as ion trapping and shuttling behavior similar to trapping chips without integrated optics, with no modification to the control voltages of the trapping chip.

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Image fluorescing ion to fiber core


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