Traps: (Micro) Fabrication

Trap platform with DC and RF electrodes, atom loading port, and multiple optical access ports (design: Prof. W. Capbell, UCLA) Trap platform with DC and RF electrodes, atom loading port, and multiple optical access ports (design: Prof. W. Capbell, UCLA) The design and microfabrication of a trap is divided between the trap platform (i.e. the structural body), and the electrodes generating the trapping field.

Trap Platform

We think of the basic structure as the “Trap Platform”. Numerous functionalities can be inserted at the trap platform level. First and foremost the trap platform supports the trapping electrodes (more on this below). Often this is its only apparent function, but the trap platform can also provide much other essential functionality, such as off-chip electrical access, sample loading conduct, optical interfacing, mechanical interfacing, etc.

These various functionalities should be taken into consideration when designing/specifying a trap platform..

Trapping Electrodes

Electrodes are of course an essential element of all atom and ion traps. They are used to confine particles and to precisely control their position. Occasionally, they are used for gating, acting as voltage-controlled valves. Electrodes can also act as a sensing element, monitoring, for example, the presence and/or the motion of trapped particles. Frequently, they are used to cover dielectric surfaces and prevent unwanted charge build-up. There are several important considerations that need to be taken into consideration when designing/specifying electrodes. It should be recognized that a trap’s ability to perform its trapping function is defined primarily by the electrode design, and ultimately, by the electrode fabrication processes (with their associated limitations). Material properties should of course also be taken into consideration.

You can learn more about the design and fabrication of trap platforms and electrode by following the links below.

An Introduction to 3D Micro-Electrode Fabrication
An Introduction to 3D Micro-Electrode Fabrication Fabrication of three-dimensional electrodes with critical dimensions at the millimeter or smaller scales enhances the operating capability of ion-traps, atom-traps, and other micro optical electrical mechanical systems (MOEMS) and sensors.
More
Ion Trap Electrodes: Material Selection
Ion Trap Electrodes: Material Selection In this article, we look specifically at the materials that are used to form the electrodes in micro-traps.
More
Ion Trap Electrodes: Metal Deposition
Ion Trap Electrodes: Metal Deposition Several processes are commonly used to form metal electrodes on ion- or atom-trap platforms.
More
Ion Trap Platform: Material Selection
Our microtrap platform fabrication is based on processes developed over the last decade at Translume. Using a combination of material patterning with femtosecond laser pulses and wet etching we precision machine microtrap bodies (i.e. microtrap platforms) from fused silica glass wafers or plates. Fused silica is used as the foundation material as it has highly desirable characteristics for micro-trap platforms.…
Step-by-Step Microfabrication of 3D Ion Trap Chips
Step-by-Step Microfabrication of 3D Ion Trap Chips As part of a program funded by the Air Force Office of Scientific Research (AFOSR), we have developed processes to microfabricate ion trap chips. We exemplify this capability here, describing the steps required to fabricate a three-dimensional microtrap chip. The same procedure can be used to fabricate surface trap platforms.
More