Polarized alkali-metal vapor with minute-long transverse spin-relaxation time

Phys Rev Lett. 2010 Aug 13;105(7):070801. doi: 10.1103/PhysRevLett.105.070801. Epub 2010 Aug 12.

Abstract

We demonstrate lifetimes of Zeeman populations and coherences in excess of 60 sec in alkali-metal vapor cells with inner walls coated with an alkene material. This represents 2 orders of magnitude improvement over the best paraffin coatings. We explore the temperature dependence of cells coated with this material and investigate spin-exchange relaxation-free magnetometry in a room-temperature environment, a regime previously inaccessible with conventional coating materials.