Chiral topological light for detecting robust enantio-sensitive observables
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arXiv
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| Main Authors: | , , , , , , |
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| Format: | Preprint |
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2023
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| _version_ | 1866914912447496192 |
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| author | Mayer, Nicola Ayuso, David Decleva, Piero Khokhlova, Margarita Pisanty, Emilio Ivanov, Misha Smirnova, Olga |
| author_facet | Mayer, Nicola Ayuso, David Decleva, Piero Khokhlova, Margarita Pisanty, Emilio Ivanov, Misha Smirnova, Olga |
| contents | The topological response of matter to electromagnetic fields is a property in high demand in materials design and metrology due to its robustness against noise and decoherence, stimulating recent advances in ultrafast photonics. Embedding topological properties into the enantio-sensitive optical response of chiral molecules could therefore enhance the efficiency and robustness of chiral optical discrimination. Here we achieve such a topological embedding by introducing the concept of chiral topological light~-- a light beam which displays chirality locally, with an azimuthal distribution of its handedness described globally by a topological charge. The topological charge is mapped onto the azimuthal intensity modulation of the non-linear optical response, where enantio-sensitivity is encoded into its spatial rotation. The spatial rotation is robust against intensity fluctuations and imperfect local polarization states of the driving field. Our theoretical results show that chiral topological light enables detection of percentage-level enantiomeric excesses in randomly oriented mixtures of chiral molecules, opening a way to new, extremely sensitive and robust chiro-optical spectroscopies with attosecond time resolution. |
| format | Preprint |
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arxiv_https___arxiv_org_abs_2303_10932 |
| institution | arXiv |
| publishDate | 2023 |
| record_format | arxiv |
| spellingShingle | Chiral topological light for detecting robust enantio-sensitive observables Mayer, Nicola Ayuso, David Decleva, Piero Khokhlova, Margarita Pisanty, Emilio Ivanov, Misha Smirnova, Olga Optics Atomic Physics Chemical Physics The topological response of matter to electromagnetic fields is a property in high demand in materials design and metrology due to its robustness against noise and decoherence, stimulating recent advances in ultrafast photonics. Embedding topological properties into the enantio-sensitive optical response of chiral molecules could therefore enhance the efficiency and robustness of chiral optical discrimination. Here we achieve such a topological embedding by introducing the concept of chiral topological light~-- a light beam which displays chirality locally, with an azimuthal distribution of its handedness described globally by a topological charge. The topological charge is mapped onto the azimuthal intensity modulation of the non-linear optical response, where enantio-sensitivity is encoded into its spatial rotation. The spatial rotation is robust against intensity fluctuations and imperfect local polarization states of the driving field. Our theoretical results show that chiral topological light enables detection of percentage-level enantiomeric excesses in randomly oriented mixtures of chiral molecules, opening a way to new, extremely sensitive and robust chiro-optical spectroscopies with attosecond time resolution. |
| title | Chiral topological light for detecting robust enantio-sensitive observables |
| topic | Optics Atomic Physics Chemical Physics |
| url | https://arxiv.org/abs/2303.10932 |