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UID:6a473e8090114
DTSTART:20260707T130000Z
SEQUENCE:0
TRANSP:OPAQUE
LOCATION:ICFO Auditorium
SUMMARY:ICFO | MARÍA HERNÁNDEZ RUIZ
CLASS:PUBLIC
DESCRIPTION:This thesis presents the development and experimental implement
 ation towards a miniaturized cavity-enhanced atomic magnetometer designed 
 for high sensitivity and high spatial resolution. The proposed technique r
 elies on a cavity-based optical readout of atomic polarization using the P
 ound Drever Hall technique.\nThe magnetometer was experimentally realized 
 and characterized\, including a design compatible with biological measurem
 ents. The magnetometer can operate with one endcap open in a weak shieldin
 g environment (only only layer of mu-metal.) The system was applied to the
  study of magnetotactic bacteria\, whose magnetic response arises from the
  alignment and relaxation dynamics of intracellular magnetosome chains. Ti
 me resolved measurements of the magnetic signal were analyzed assuming exp
 onential relaxation. Furthermore\, the model was expanded using a stochast
 ic model to detect deviations from exponential behavior associated with sa
 mple evaporation.\nThe achieved sensitivity and stability of the magnetome
 ter enabled the reliable detection of magnetic signals on the nanotesla sc
 ale\, with a sensing characteristic length Lat=1.5 mm. These results demon
 strate the potential of cavity-enhanced atomic magnetometry for the invest
 igation of biological magnetic systems. This work establishes a versatile 
 platform for high-sensitivity magnetic measurements and opens promising pe
 rspectives for future applications in biophysics and magnetic microscopy.\
 nThesis Director: Prof. Dr. Morgan Mitchell and Dr. Vito Giovanni Lucivero
DTSTAMP:20260703T044552Z
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