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DTSTAMP:20260406T173339Z
UID:1734339600@ist.ac.at
DTSTART:20241216T100000
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DESCRIPTION:Speaker: Olga Smirnova\nhosted by Mikhail Lemeshko\nAbstract: A
 bstract: An object is said to be chiral if it cannot be superimposed on it
 s mirror image by any rotation. The two mirror images of the same chiral m
 olecule are called enantiomers and are often referred to as “left”- an
 d “right”-handed. While the physical properties of the two enantiomers
  of the same chiral molecule are nearly identical\, the geometric property
  of chirality leads to vastly different chemical properties of the two ena
 ntiomers. The need for rigorous selection of a specific enantiomer\, a now
  standard requirement in drug design\, is one of the many reasons behind t
 he ever-greater need for improving sensitivity of chiral sensing.Yet\, sta
 ndard optical methods of chiral detection still use the same principles as
  the method discovered by Louis Pasteur in the XIX century: the linear int
 eraction between chiral molecules and light\, which becomes chiral-sensiti
 ve due to the magnetic field component of the light wave.Ultrafast non-lin
 ear spectroscopies promise to increase the enantio-sensitive signal by thr
 ee orders of magnitude [1] by removing the need to rely on the interaction
  with the magnetic field component of light. The second important feature 
 of non-linear light-matter interactions is the opportunity to imprint topo
 logical properties of light on matter\, presenting an opportunity to achie
 ve topologically robust enantio-sensitive observables.I will describe our 
 very recent results [2\,3] on marrying chiral and topological properties i
 n ultrafast electronic response of chiral molecules in the gas phase\, ena
 bling highly efficient and robust chiral observables. I will present three
  vignettes where topological connection appears in optical or electronic c
 hiral response:Chiral topological light: a new concept enabling chiral-sen
 sitive and topologically robust properties of high harmonic emission\, gen
 erated by such light in chiral molecular gases [2]Geometry of temporal chi
 ral structures: a concept encompassing the emergence of geometric fields i
 n electronic response of chiral molecules [3]Enantio-sensitive exceptional
  points: chiral topology in non-Hermitian chiral systems [4] 
LOCATION:Office Building West/Ground Floor/Heinzel Seminar Room\, ISTA
ORGANIZER:
SUMMARY:Olga Smirnova: Ultrafast molecular chirality: a topological connect
 ion | Olga Smirnova ( MBI Berlin) 
URL:https://talks-calendar.ista.ac.at/events/5453
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