Neutral atom arrays

Our experiment features a multi-section chamber, atoms are first in a 3D MOT in the octagon chamber. A blue detuned push beam is turned on for ~0.2ms to impart momentum to atoms in the 3D MOT initiating transport to the science chamber. After ~20ms time-of-flight a 3DMOT is loaded in the science chamber. Here an array of optical tweezers are overlapped with cooled MOT to trap single atoms.



Name Group status
Bryce Gadway PI
Tao Chen Postdoc — 2021-Present
Chenxi Huang Graduate student — 2021-Present
Ivan Velkosky Graduate student — 2021-Present
Cheeranjeev Purmessur Graduate student — 2021-Present
Eric Meier Postdoc — 2019-2021
Jackson Ang’ong’a Graduate student — 2015-2021



Vacuum chamber after assembly and baking

Glimpse of the D2 Laser preparation set up

Chamber ca 2020


Rapid transport (from the Octagon chamber to the science chamber) between two 3D MOTs
A CCD camera captures the formation of the MOT in the science chamber


Single atom preparation


NA=0.5 objectives for single atom trapping

Mounted objective before setting up next to glass cell

Objectives mounted in the set up. The objective to the left delivers optical microtraps at 780nm. Fluorescence from the atoms (767nm) are collected by the objective to the right and imaged at an EMCCD camera. Also visible are coil holders for B field MOT gradient coils and field cancellation coils

Single atom trapping in optical microtraps

Imaging an optical dipole trap for alignment with MOT.  A near-resonant beam (in combination with D2 repump beam from MOT beams) is superimposed to the optical microtrap path  for alignment

Loading and imaging a single potassium atom into a 780nm microtrap



Atom array


Rydberg excitation

Optical transitions for Rydberg excitation.

PDH set up for stabilizing 973 nm and 405 nm lasers.