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Poster Session

Poster Session II

4:00 pm – 6:00 pm, Wednesday June 18 Session H00 Oregon Convention Center, Exhibit Hall E
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Cooling And Imaging A Single Trapped Cs Atom With A Quadrupole Transition

Poster 130
Presenter: Raymond Chen (Purdue University)
Authors: Saumitra Sudhir Phatak (Purdue University), Karl Blodgett (Purdue University), Jonathan Hood (Purdue University)
Collaboration: Jonathan Hood's Group

We present three key advances in optical tweezer experiments: 1) Imaging lithium-6 atoms with near-ground state cooling using Λ-enhanced gray molasses, setting a new benchmark for low-loss imaging in neutral atoms. 2) A theoretical framework for various cooling mechanisms in optical tweezers, including gray molasses, sideband cooling, and polarization gradient cooling. 3) Cooling and imaging a single trapped Cs atom using the 685 nm 6S1/2–5D5/2 quadrupole transition, achieving 10 μK with background-free imaging. By shaping the excitation beam into a vortex mode, we transfer two units of angular momentum, enhancing quadrupole interactions and minimizing off-resonant scattering.

Looking ahead, we aim to create a 10-atom tweezer array with Cs and lithium (Li) atoms, exploring Feshbach resonances and magneto-association to form LiCs Feshbach molecules. We will also employ Stimulated Raman Adiabatic Passage (STIRAP) to achieve stable ground-state LiCs molecules, advancing ultracold chemistry and quantum control.

Funding acknowledgement

NSF Career Award (<strong _mstmutation="1">Award Abstract # 2239961)

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