NICE2026 Nonlinear Imaging and Coherent Effects

Session

Multidimensional Spectroscopic

May 21, 2026, 8:45 AM

Latisana, Italy

Description

Chair Giulia Fulvia Mancini, University Pavia

17. Linear and non-linear X-ray studies of chirality in liquid solutions

Majed Chergui (Elettra Sincrotrone Trieste)

5/21/26, 8:45 AM

Invited talk

Molecular chirality is central to biology and chemistry. Identification of enantiomers of chiral molecules is mostly based on optical circular dichroism (CD). It measures the absorption difference of left and right circularly polarised light by the sample. CD signals are intrinsically weak, usually 0.1% of the linear absorption, which makes them challenging to measure. Pushing CD spectroscopy...

46. Amplification of weak spontaneous emission from low-lying doubly excited states in helium gas

Matjaz Zitnik (Jozef Stefan Institute)

5/21/26, 9:20 AM

Invited talk

We have detected self-amplified spontaneous emission (ASE) from 3a $^1P^o$ doubly excited state (DES) in He. In an isolated atom, this autoionizing resonance features a small $5\times 10^{-4}$ branching for fluorescence decay, preferably populating the singlet 1s3s singly excited state. To locate FEL wavelengths resonant with DES, the microfluidic gas cell was modified by adding the two...

19. Attosecond momentum-resolved resonant x-ray scattering of photo-excited molecules: observing charge in motion.

Maksim Radionov (Brandenburg University of Technology)

5/21/26, 9:55 AM

Contributed talk

Improving our understanding of electron dynamics is essential for advancing energy transfer, optoelectronics, light-harvesting systems, and quantum computing. Recent developments in attosecond x-ray sources provide the fundamental possibility of observing these dynamics with atomic-scale spatial resolution. However, connecting a time-resolved signal to the dynamics remains challenging due to...

30. Sum-Frequency Generation Spectro-Microscopy using the FHI-FEL

Dorothee Mader (Fritz-Haber-Institut der Max-Planck-Gesellschaft)

5/21/26, 10:20 AM

Contributed talk

In this talk infrared-visible sum-frequency generation (SFG) spectro-microscopy using the FHI-FEL is introduced. This method combines benefits from second harmonic generation imaging such as local information on structural symmetry and benefits from sum-frequency generation spectroscopy such as details of the atomic structure and bonding via vibrational resonances.

We demonstrate an...