Mainz 2026 – wissenschaftliches Programm
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MO: Fachverband Molekülphysik
MO 6: Attosecond physics I (joint session A/MO)
MO 6.4: Vortrag
Montag, 2. März 2026, 18:00–18:15, N 1
Structured light for enhanced attosecond chiral sensing — •Nicola Mayer1, Anne Weber1, Daniele Toffoli2, 3, Margarita Khokhlova1, and Emilio Pisanty1 — 1Attosecond Quantum Physics Group, King's College London, London (United Kingdom) — 2Dipartimento di Scienze Chimiche e Farmaceutiche, Università degli studi di Trieste, Via L. Giorgieri 1, I-34127, Trieste, Italy — 3IOM-CNR, Istituto Officina dei Materiali, 34149, Trieste, Italy
Chirality is an ubiquitous phenomenon in nature, spanning many orders of magnitude in length, from the cosmic scale in spiraling galaxies to the microscopic one in chiral molecules. The interaction of polychromatic synthetic chiral light beams (SCL) with chiral molecules is expected to enhance chiral signals in observables such as HHG or photoelectron yield. Here, we show that by using vector-vortex beams with radial and azimuthal polarization, the chirality of SCL beams carrying a chiral topological charge can be increased by two orders of magnitude, leading to a huge enhancement in chiral signals. We prove theoretically such enhancement by using an ab-initio based strong-field approximation approach to describe HHG in fenchone and camphor, with state-of-art saddle point methods to describe polychromatic three-dimensional quantum orbits in the continuum. Our results bring the goal of experimental proof of these techniques closer to reach, both in chiral molecules as well as in atoms.
Keywords: Chirality; High-Harmonic Generation; Structured Light; Topology; Saddle point methods