Open AccessHighly uniform holographic microtrap arrays for single atom trapping using a feedback optimization of in-trap fluorescence measurements
Author(s) -
Hikaru Tamura,
Tomoyuki Unakami,
Jun He,
Yoko Miyamoto,
K. Nakagawa
Publication year - 2016
Publication title -
optics express
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.394
H-Index - 271
ISSN - 1094-4087
DOI - 10.1364/oe.24.008132
Subject(s) - trapping , trap (plumbing) , optics , holography , atom (system on chip) , fluorescence , physics , spatial light modulator , diffraction , materials science , atomic physics , computer science , ecology , meteorology , biology , embedded system
We report on the novel optimization method to realize highly uniform microtrap arrays for single atom trapping with a spatial light modulator (SLM). This method consists of two iterative feedback loops with the measurements of both diffracted light intensities and in-trap fluorescence intensities from each microtrap. By applying this method to the single 87 Rb atom trapping, we can reduce the variance of trap depths from 20.8% to 1.7% for 4 × 4 square arrays and less than 4% for various arrays with up to 62 sites. The detection error of individual single atoms is also reduced from 1.7% to 0.0054% on average.