Coherent excitation transfer <italic style="font-style: italic">via</italic> the dark-state channel in a bionic system

Hui Dong; Da-Zhi Xu; Jin-Feng Huang; Chang-Pu Sun

doi:10.1038/lsa.2012.2

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Coherent excitation transfer via the dark-state channel in a bionic system

Original Article

- Coherent excitation transfer via the dark-state channel in a bionic system
- Light: Science & Applications Vol. 1, Issue 1, (2012)
- Affiliations：
  
  State Key Laboratory of Theoretical Physics, Institute of Theoretical Physics, Chinese Academy of Sciences, Beijing 100190, China
- Author bio：
  
  Professor CP Sun, State Key Laboratory of Theoretical Physics, Institute of Theoretical Physics, Chinese Academy of Sciences, Beijing 100190, China. E-mail: suncp@itp.ac.cn
- Funds：
- DOI：10.1038/lsa.2012.2
  CLC：
- Published：2012-03，
  
  Published Online：29 March 2012，
  
  Received：17 January 2012，
  
  Revised：13 February 2012，
  
  Accepted：17 February 2012
- Accepted：
Scan QR Code
Dong, H. et al. Coherent excitation transfer via the dark-state channel in a bionic system. Light: Science & Applications, 1, e2 (2012).
DOI：

Dong, H. et al. Coherent excitation transfer via the dark-state channel in a bionic system. Light: Science & Applications, 1, e2 (2012). DOI： 10.1038/lsa.2012.2.

摘要

Abstract

Light absorption and energy transfer were studied in a bionic system with donors and an acceptor. In the optimal case of uniform couplings

this seemingly complicated system was reduced to a three-level Λ-type system. With this observation

we showed that the efficiency of energy transfer through a dark-state channel

which is free of the spontaneous decay of the donors

was dramatically improved. After the overall average transfer time was evaluated

it was revealed that the time required for transfer through this channel was not optimal. To find the optimal parameters for the present system

we defined a new quantity

output power

which characterizes the average mean output of the whole transfer process. We estimated the optimal parameters of the system to achieve the maximum output power. The splitting behaviour of the maximum power may be used to explain the phenomenon of photosynthetic systems primarily absorbing two colours of light.

关键词

Keywords

dark stateexcitation transferlight harvestingquantum coherence

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Coherent excitation transfer via the dark-state channel in a bionic system

DOI：10.1038/lsa.2012.2

摘要

Abstract

关键词

Keywords

references