2016/10/31 by S. E. Thomas, S E Thomas, J. H. D. Munns +17
Physics and Astronomy · #Alkali metal #Bandwidth (computing) #Caesium #Cold Atom Physics and Bose-Einstein Condensates #Mechanical and Optical Resonators #Quantum efficiency #Quantum optics and atomic interactions #Quenching (fluorescence) #Raman spectroscopy #Trapping #Vapours #physics.atom-ph #quant-ph
paper · pdf · doi:10.1088/1367-2630/aa7534
11 pages, 6 figures
arxiv created 2017/02/01 · openalex publication_date 2017/05/26 · openalex created_date 2017/06/05 · arxiv updated 2017/08/02 · openalex updated_date 2026/08/05
Raman interactions in alkali vapours are used in applications such as atomic clocks, optical signal processing, generation of squeezed light and Raman quantum memories for temporal multiplexing. To achieve a strong interaction the alkali ensemble needs both a large optical depth and a high level of spin-polarisation. We implement a technique known as quenching using a molecular buffer gas which allows near-perfect spin-polarisation of over in caesium vapour at high optical depths of up to a factor of 4 higher than can be achieved without quenching. We use this system to explore efficient light storage with high gain in a GHz bandwidth Raman memory.