Volume 15 Issue 1
Jan.  2022
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CAO Wen-jing, SUN Li-ze-tong, GUO Fu-zhou, SONG Jian-tong, LIU Xiao, CHEN Zhi-hui, YANG Yi-biao, SUN Fei. Enhancing the fluorescence emission by flexible metal-dielectric-metal structures[J]. Chinese Optics, 2022, 15(1): 144-160. doi: 10.37188/CO.2021-0084
Citation: CAO Wen-jing, SUN Li-ze-tong, GUO Fu-zhou, SONG Jian-tong, LIU Xiao, CHEN Zhi-hui, YANG Yi-biao, SUN Fei. Enhancing the fluorescence emission by flexible metal-dielectric-metal structures[J]. Chinese Optics, 2022, 15(1): 144-160. doi: 10.37188/CO.2021-0084

Enhancing the fluorescence emission by flexible metal-dielectric-metal structures

doi: 10.37188/CO.2021-0084
Funds:  Supported by National Natural Science Foundation of China (No. 62175178, No. 11674239); the Central Guidance on Local Science and Technology Development Fund of Shanxi Province (No. YDZJSX2021A013); Program for the Top Young Talents of Shanxi Province; Program for the Sanjin Outstanding Talents of China
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  • Author Bio:

    Cao Wen-jing (1994—), female, born in Linfen, Shanxi Province, Master student. Received the bachelor degree from Taiyuan Normal University in 2018; Currently studying at Ministry of Education of New Sensor and Intelligent Control, Taiyuan University of Technology/Shanxi Key Laboratory, major in Condensed Matter Physics, mainly engaged in the research of micro-nano photonics.E-mail: cwjskr@126.com

    Chen Zhi-hui (1984—), male, born in Taiyuan, Shanxi Province. Doctor, professor and doctoral supervisor; Received the bachelor degree from Beijing University of Posts and Telecommunications in 2006 and the doctor degree from the Royal Swedish Institute of technology in 2012. Currently working in the Ministry of Education of New Sensor and Intelligent Control, Taiyuan University of Technology/Shanxi Key Laboratory, mainly engaged in research on micro nano photonics.E-mail: huixu@126.com

  • Corresponding author: huixu@126.com
  • Received Date: 19 Apr 2021
  • Accepted Date: 11 Aug 2021
  • Rev Recd Date: 11 May 2021
  • Available Online: 11 Aug 2021
  • Publish Date: 19 Jan 2022
  • The technology of enhancing fluorescence emission can increase the sensitivity of fluorescence detection and the brightness of Light Emitting Diodes (LEDs), and is of great significance in improving the performance of light-emitting devices. Since the metal structure has a good effect in enhancing the local field and fluorescence emission, and the flexible dielectric material has flexible bendability characteristics, on the basis of above, we propose a flexible structure composed of Metal-Dielectric-Metal (MDM) to enhance the fluorescence emission. The influence of the structure on the directional emission enhancement of quantum dots is systematically studied by using the finite difference time domain method. Theoretical calculations show that the local undulations and arcs of the flexible MDM structure can promote fluorescence enhancement and increase the quantum efficiency of the quantum dots located at the center of the structure by about 7 times. They can alao change the refractive index and thickness of the dielectric to achieve the tunability of the target wavelength. At the same time, the experimental results shows that the flexible MDM structure does have a positive effect on the fluorescence enhancement. This discovery is valuable for future display technologies and flexible light-emitting devices. It is of certain guiding significance for the development and application of high-efficiency flexible devices.

     

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