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13 March 2024 Single-photon probing of photosynthetic light harvesting
Quanwei Li, Kaydren Orcutt, Robert Cook, Javier Sabines-Chesterking, Ashley Tong, Gabriela Schlau-Cohen, Xiang Zhang, Graham Fleming, K. Birgitta Whaley
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Proceedings Volume PC12863, Quantum Effects and Measurement Techniques in Biology and Biophotonics; PC128630I (2024) https://doi.org/10.1117/12.2691717
Event: SPIE BiOS, 2024, San Francisco, California, United States
Abstract
Using a photon-counting quantum light spectroscopy that probes photosynthetic light harvesting with a single photon at a time, we experimentally demonstrated that photosynthesis begins and proceeds with a single quantum of energy. We report the observation of individual single-photon absorption and emission events in spatially distinct regions in photosynthetic systems. The experiments were carried out on an ensemble of pigment-protein complexes light-harvesting 2 from purple bacteria Rhodobacter sphaeroides under ambient conditions in vitro.
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Quanwei Li, Kaydren Orcutt, Robert Cook, Javier Sabines-Chesterking, Ashley Tong, Gabriela Schlau-Cohen, Xiang Zhang, Graham Fleming, and K. Birgitta Whaley "Single-photon probing of photosynthetic light harvesting", Proc. SPIE PC12863, Quantum Effects and Measurement Techniques in Biology and Biophotonics, PC128630I (13 March 2024); https://doi.org/10.1117/12.2691717
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KEYWORDS
Light harvesting
Photosynthesis
Quantum light
Quantum optics experiments
Quantum systems
Spectroscopy
Complex systems
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