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Strong coupling between colloidal quantum dots and dielectric film at room temperature

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Abstract

In this study, the angle-resolved photoluminescence and reflection spectra from colloidal quantum dots on materials with low-refractive-index/high-refractive-index structure at room temperature are investigated. The photoluminescence spectra for the materials split into two main spectral peaks at various angles. Different kinds of dielectric materials and different thicknesses are used to verify the PL spectral splitting phenomena. By comparing the PL spectrum and RL spectrum of dielectric materials on substrates with different refractive indexes, the PL spectral splitting is attributed to strong coupling between the quantum dots exciton and asymmetric F–P cavity formed in the low-refractive-index/high-refractive-index material. The loss of the F–P mode decreases due to the destructive interference effect.

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Data underlying the results presented in this paper are not publicly available at this time, but may be obtained from the author upon reasonable request.

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Acknowledgements

The project was supported by the National Natural Science Foundation of China (Grant Nos. 92165202), the Strategic Priority Research Program (A) of Chinese Academy of Sciences (Grant No. XDA18040300), and the Innovation progaram for Quantum Science and Technology (Grant No. 2021ZD0300701).

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Authors and Affiliations

  1. Key Laboratory of Optoelectronic Materials and Devices, Chinese Academy of Sciences, Beijing, 100083, People’s Republic of China

    Xingsheng Xu

  2. College of Materials Science and Optoelectronic Technology, University of Chinese Academy of Sciences, Beijing, 100049, People’s Republic of China

    Xingsheng Xu

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Xu did all the work of the manuscript.

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Correspondence to Xingsheng Xu.

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Xu, X. Strong coupling between colloidal quantum dots and dielectric film at room temperature. Appl. Phys. B 130, 23 (2024). https://doi.org/10.1007/s00340-023-08158-w

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