| ELECTROMAGNETISM, OPTICS, ACOUSTICS, HEAT TRANSFER, CLASSICAL MECHANICS, AND FLUID DYNAMICS |
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High-efficiency asymmetric diffraction based on PT-antisymmetry in quantum dot molecules |
| Guangling Cheng(程广玲)1, Yongsheng Hu(胡永升)1, Wenxue Zhong(钟文学)1, and Aixi Chen(陈爱喜)2,† |
1 Department of Applied Physics, East China Jiaotong University, Nanchang 330013, China;
2 Department of Physics, Zhejiang Sci-Tech University, Hangzhou 310018, China |
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Abstract We present preparation of asymmetric grating with higher diffraction efficiency in quantum dot molecules by combining the tunneling effect and parity-time antisymmetry. In the presence of tunneling between two quantum dots, the system exhibits the striking PT antisymmetry via spatially modulating the driving field and the detuning with respect to the driven transition. For this reason, the asymmetric grating could be achieved. The results show that the diffraction efficiency can be adjustable via changing the driving intensity, detuning, tunneling strength, and interaction length, and then the high-order diffraction can be reached. The scheme provides a feasible way to obtain the direction-controlled diffraction grating, which can be helpful for optical information processing and realization of controllable optical self-image.
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Received: 28 April 2021
Revised: 18 May 2021
Accepted manuscript online: 24 May 2021
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PACS:
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42.50.Gy
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(Effects of atomic coherence on propagation, absorption, and Amplification of light; electromagnetically induced transparency and Absorption)
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32.80.Qk
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(Coherent control of atomic interactions with photons)
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| Fund: This work is supported by the National Natural Science Foundation of China (Grant Nos. 11905064, 11775190 and 11565013) and the Scientific Research Foundation of Jiangxi Provincial Education Department, China (Grant No. GJJ200624). |
Corresponding Authors:
Aixi Chen
E-mail: aixichen@zstu.edu.cn
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Cite this article:
Guangling Cheng(程广玲), Yongsheng Hu(胡永升), Wenxue Zhong(钟文学), and Aixi Chen(陈爱喜) High-efficiency asymmetric diffraction based on PT-antisymmetry in quantum dot molecules 2022 Chin. Phys. B 31 014202
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