Non-Dichroic Enantio-Sensitive Chiroptical Spectroscopy
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arXiv
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| Format: | Preprint |
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2025
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| author | Fede, Letizia Rajak, Debobrata Sparling, Chris Ayuso, David Blanchet, Valérie Decleva, Piero Descamps, Dominique Petit, Stéphane Pons, Bernard Mairesse, Yann Ordóñez, Andrés |
| author_facet | Fede, Letizia Rajak, Debobrata Sparling, Chris Ayuso, David Blanchet, Valérie Decleva, Piero Descamps, Dominique Petit, Stéphane Pons, Bernard Mairesse, Yann Ordóñez, Andrés |
| contents | Chiroptical effects using circularly polarized light produce signals that change sign when switching either molecular handedness (enantiosensitivity) or the light helicity (circular dichroism). Here, we break this enantiosensitive-and-dichroic paradigm by measuring a new type of chiroptical signal which is enantiosensitive but not dichroic. We photoionize chiral molecules using a strong laser field and detect the three-dimensional photoelectron momentum distribution. The non-dichroic, enantiosensitive asymmetry is encoded in octupolar and higher multipolar terms in the photoelectron angular distribution, which appear in multiphoton ionization with elliptically polarized fields or cross polarized two-color fields. The robustness of the enantiosensitivity with respect to the relative phase between the vectorial components of the ionizing field represents an example of symmetry protection, and opens unexplored opportunities for imaging ultrafast dynamics in chiral molecules, such as enantiosensitive photoelectron spectroscopy with bright squeezed vacuum states. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2512_19062 |
| institution | arXiv |
| publishDate | 2025 |
| record_format | arxiv |
| spellingShingle | Non-Dichroic Enantio-Sensitive Chiroptical Spectroscopy Fede, Letizia Rajak, Debobrata Sparling, Chris Ayuso, David Blanchet, Valérie Decleva, Piero Descamps, Dominique Petit, Stéphane Pons, Bernard Mairesse, Yann Ordóñez, Andrés Chemical Physics Atomic Physics Chiroptical effects using circularly polarized light produce signals that change sign when switching either molecular handedness (enantiosensitivity) or the light helicity (circular dichroism). Here, we break this enantiosensitive-and-dichroic paradigm by measuring a new type of chiroptical signal which is enantiosensitive but not dichroic. We photoionize chiral molecules using a strong laser field and detect the three-dimensional photoelectron momentum distribution. The non-dichroic, enantiosensitive asymmetry is encoded in octupolar and higher multipolar terms in the photoelectron angular distribution, which appear in multiphoton ionization with elliptically polarized fields or cross polarized two-color fields. The robustness of the enantiosensitivity with respect to the relative phase between the vectorial components of the ionizing field represents an example of symmetry protection, and opens unexplored opportunities for imaging ultrafast dynamics in chiral molecules, such as enantiosensitive photoelectron spectroscopy with bright squeezed vacuum states. |
| title | Non-Dichroic Enantio-Sensitive Chiroptical Spectroscopy |
| topic | Chemical Physics Atomic Physics |
| url | https://arxiv.org/abs/2512.19062 |