Publications

Papers, preprints, and what they contributed.

These publications form the backbone of my thesis work: high-survival lithium imaging, a unified cooling theory, and cesium quadrupole cooling/background-free imaging.

PhD Thesis 2026

Cooling Lithium and Cesium Single Atoms in Optical Tweezers

Saumitra S. Phatak, Purdue University, Hood Lab

Dissertation covering laser cooling theory for trapped spinful atoms, high-survival lithium imaging, and narrow-line cesium cooling and imaging in optical tweezers.

PRA 2025 · co-first

Narrow-Line Electric Quadrupole Cooling And Background-Free Imaging Of A Single Cs Atom With Spatially Structured Light

Karl N. Blodgett*, Saumitra S. Phatak*, Meng Raymond Chen, David Peana, Claire Pritts, Jonathan D. Hood

Demonstrates 685 nm quadrupole excitation of a single Cs atom in a tweezer using spatially structured light, enabling background-free 852 nm cascade imaging and narrow-line cooling.

PRA 2024 · theory

Generalized theory for optical cooling of a trapped atom with spin

Saumitra S. Phatak, Karl N. Blodgett, David Peana, Meng Raymond Chen, Jonathan D. Hood

Develops a master-equation framework that connects sideband, polarization-gradient, gray-molasses, Λ-GM, EIT-like, and Raman cooling mechanisms for bound atoms with spin.

PRL 2023

Imaging a 6Li Atom In An Optical Tweezer 2000 Times with Λ-Enhanced Gray Molasses

Karl N. Blodgett, David Peana, Saumitra S. Phatak, Lane M. Terry, Maria Paula Montes, Jonathan D. Hood

Reports high-fidelity fluorescence imaging of a single lithium atom in an optical tweezer, achieving 2000 consecutive images with 99.950% per-image survival.