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VERSION:2.0
PRODID:Icfo
X-PUBLISHED-TTL:P1W
BEGIN:VEVENT
UID:69d282193259f
DTSTART:20220225T090000Z
SEQUENCE:0
TRANSP:OPAQUE
LOCATION:ICFO Auditorium and Online (Teams)
SUMMARY:ICFO | LORENA BIANCHET
CLASS:PUBLIC
DESCRIPTION:In this thesis\, a single-atom trap in a &ldquo\;Maltese cross'
 ' geometry (MCG) was designed\, built up and characterized. A MCG atom tra
 p uses four in-vacuum lenses to achieve four-directional high-numerical-ap
 erture optical coupling to single trapped atoms and small atomic arrays.&n
 bsp\;\nHere\, we describe the theoretical background\, the design\, and th
 e optical methods used for trapping and cooling atoms in a MCG geometry op
 timized for high coupling efficiency.&nbsp\; We also characterize the resu
 lting properties of the trap and trapped atoms. For this propose we measur
 e occupancy\, loading rate\, lifetime\, temperature\, fluorescence anti-bu
 nching and trap frequencies using current best practices. We also report a
 nother use of the optical control and coupling offered by the MCG: we use 
 the two on-trap-axis lenses to produce a 1D optical lattice\, the sites of
  which are stochastically filled and emptied by the trap loading process. 
 The two off-trap-axis lenses are used for imaging and single-mode collecti
 on. Correlations of single-mode and imaging fluorescence signals are then 
 used to map the single-mode collection efficiency.\nWe observe trap charac
 teristics comparable to what has been reported for single-atom traps with 
 one- or two-lens optical systems. This shows that four-direction high-NA c
 oupling can be achieved with little reduction in trap performance. Finally
 \, we conclude with the near-future plans of the experiment.\n&nbsp\;\nThe
 sis Director: Prof Dr. Morgan Mitchell\n&nbsp\;
DTSTAMP:20260405T153905Z
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