BEGIN:VCALENDAR
VERSION:2.0
PRODID:Icfo
X-PUBLISHED-TTL:P1W
BEGIN:VEVENT
UID:69d8d2420c6cc
DTSTART:20220725T090000Z
SEQUENCE:0
TRANSP:OPAQUE
LOCATION:Auditorium and Online (Teams)
SUMMARY:ICFO | AURELIEN SANCHEZ
CLASS:PUBLIC
DESCRIPTION:Since discovering wave-particle duality\, science has changed o
 ur perception of light and matter\, especially at the subatomic level. Tha
 nks to such discoveries\, we have been able to develop and expand our scie
 ntific knowledge over the past two centuries\, crossing those limits. For 
 instance\, let us take the famous double-slit experiment from T. Young (18
 01). This experiment has been extended after the twentieth-century quantum
  revolution\, revealing electron and neutron diffraction used nowadays to 
 measure the nuclei separation from complex structures. Similarly\, the exp
 eriment of Michelson and Morley (1887)\, which follows T. Young foundation
 s\, got a fair success in astronomy\, enabling high-resolution imaging of 
 stars in the universe. In this thesis\, we use light to generate electrons
  and produce interferences similar to the double-slit experiment\, which i
 s analyzed further to study the atomic properties.\nOn the dynamics of an 
 atom\, that is\, attoscience\, we use ultrafast laser pulses to trigger mo
 tions on a femtoseconds time-scale.\nTogether with the use of strong inten
 se laser fields in the Mid-IR regime\, the electron is ionized with zero-k
 inetic energy and subsequently accelerated by the laser ponderomotive ener
 gy.\nStrong field dynamics offer rich structures that are encoded in the p
 hotoelectron momentum distribution. Since we use two-color combined laser 
 fields\, we can gate and control those dynamics further down on the sub-cy
 cle scale. More precisely\, we show that with the help of a Reaction Micro
 scope\, we can extract both electron information and nuclear dynamics with
 in extraordinary sub-cycle temporal resolution.\nFinally\, the strong-fiel
 d recollision model is investigated with molecules through the previously 
 developed laser-induced electron diffraction (LIED) method. We show that b
 ackscattered electron interferences\, issued from strong field at low impa
 ct parameters\, embedded a particular molecular orientation that can be re
 produced when the molecule is considered aligned with the laser field pola
 rization. Those findings seem to encode a more profound property about wav
 e diffraction in molecules until recently unexplored due to the imposed co
 nditions given in conventional electron diffraction (CED).\n&nbsp\;\nThesi
 s Director: Prof Dr. Jens Biegert
DTSTAMP:20260410T103442Z
END:VEVENT
END:VCALENDAR