Observation of an excitonic quantum coherence in CdSe nanocrystals
Recent observations of excitonic coherences within photosynthetic complexes suggest that quantum coherences could enhance biological light harvesting efficiencies. Here, we employ optical pump–probe spectroscopy with few-femtosecond pulses to observe an excitonic quantum coherence in CdSe nanocrysta...
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sg-ntu-dr.10356-807752023-02-28T19:30:51Z Observation of an excitonic quantum coherence in CdSe nanocrystals Dong, Shuo Trivedi, Dhara Chakrabortty, Sabyasachi Kobayashi, Takayoshi Chan, Yinthai Prezhdo, Oleg V. Loh, Zhi-Heng School of Physical and Mathematical Sciences DRNTU::Science::Chemistry Recent observations of excitonic coherences within photosynthetic complexes suggest that quantum coherences could enhance biological light harvesting efficiencies. Here, we employ optical pump–probe spectroscopy with few-femtosecond pulses to observe an excitonic quantum coherence in CdSe nanocrystals, a prototypical artificial light harvesting system. This coherence, which encodes the high-speed migration of charge over nanometer length scales, is also found to markedly alter the displacement amplitudes of phonons, signaling dynamics in the non-Born–Oppenheimer regime. NRF (Natl Research Foundation, S’pore) Accepted version 2015-10-12T04:02:07Z 2019-12-06T13:58:39Z 2015-10-12T04:02:07Z 2019-12-06T13:58:39Z 2015 2015 Journal Article Dong, S., Trivedi, D., Chakrabortty, S., Kobayashi, T., Chan, Y., Prezhdo, O. V., et al. (2015). Observation of an excitonic quantum coherence in CdSe nanocrystals. Nano Letters, 15(10), 6875-6882. 1530-6984 https://hdl.handle.net/10356/80775 http://hdl.handle.net/10220/38792 10.1021/acs.nanolett.5b02786 en Nano Letters © 2015 American Chemical Society. This is the author created version of a work that has been peer reviewed and accepted for publication by Nano Letters, American Chemical Society. It incorporates referee’s comments but changes resulting from the publishing process, such as copyediting, structural formatting, may not be reflected in this document. The published version is available at: [http://dx.doi.org/10.1021/acs.nanolett.5b02786]. 8p. application/pdf |
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DRNTU::Science::Chemistry Dong, Shuo Trivedi, Dhara Chakrabortty, Sabyasachi Kobayashi, Takayoshi Chan, Yinthai Prezhdo, Oleg V. Loh, Zhi-Heng Observation of an excitonic quantum coherence in CdSe nanocrystals |
| description |
Recent observations of excitonic coherences within photosynthetic complexes suggest that quantum coherences could enhance biological light harvesting efficiencies. Here, we employ optical pump–probe spectroscopy with few-femtosecond pulses to observe an excitonic quantum coherence in CdSe nanocrystals, a prototypical artificial light harvesting system. This coherence, which encodes the high-speed migration of charge over nanometer length scales, is also found to markedly alter the displacement amplitudes of phonons, signaling dynamics in the non-Born–Oppenheimer regime. |
| author2 |
School of Physical and Mathematical Sciences |
| author_facet |
School of Physical and Mathematical Sciences Dong, Shuo Trivedi, Dhara Chakrabortty, Sabyasachi Kobayashi, Takayoshi Chan, Yinthai Prezhdo, Oleg V. Loh, Zhi-Heng |
| format |
Article |
| author |
Dong, Shuo Trivedi, Dhara Chakrabortty, Sabyasachi Kobayashi, Takayoshi Chan, Yinthai Prezhdo, Oleg V. Loh, Zhi-Heng |
| author_sort |
Dong, Shuo |
| title |
Observation of an excitonic quantum coherence in CdSe nanocrystals |
| title_short |
Observation of an excitonic quantum coherence in CdSe nanocrystals |
| title_full |
Observation of an excitonic quantum coherence in CdSe nanocrystals |
| title_fullStr |
Observation of an excitonic quantum coherence in CdSe nanocrystals |
| title_full_unstemmed |
Observation of an excitonic quantum coherence in CdSe nanocrystals |
| title_sort |
observation of an excitonic quantum coherence in cdse nanocrystals |
| publishDate |
2015 |
| url |
https://hdl.handle.net/10356/80775 http://hdl.handle.net/10220/38792 |
| _version_ |
1759855989015707648 |