Enhancement of Photoluminescence by Ag Localized Surface Plasmon Resonance for Ultraviolet Detection

Yanlei Lyu; Jun Ruan; Mingwei Zhao; Ruijin Hong; Dawei Zhang; Chunxian Tao

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자료유형: 학술저널

저자정보: Yanlei Lyu (University of Shanghai for Science and Technology) Jun Ruan (University of Shanghai for Science and Technology) Mingwei Zhao (University of Shanghai for Science and Technology) Ruijin Hong (University of Shanghai for Science and Technology) Dawei Zhang (University of Shanghai for Science and Technology) Chunxian Tao (University of Shanghai for Science and Technology)

저널정보: 한국광학회 Current Optics and Photonics Current Optics and Photonics Vol.5 No.1

발행연도: 2021.2

수록면: 1 - 7 (7page)

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For higher sensitivity in ultraviolet (UV) and even vacuum ultraviolet (VUV) detection of silicon-based sensors, a sandwich-structured film sensor based on Ag Localized Surface Plasmon Resonance (LSPR) was designed and fabricated. This film sensor was composed of a Ag nanoparticles (NPs) layer, SiO₂ buffer and fluorescence layer by physical vapour deposition and thermal annealing. By tuning the annealing temperature and adding the SiO₂ layer, the resonance absorption wavelength of Ag NPs matched with the emission wavelength of the fluorescence layer. Due to the strong plasmon resonance coupling and electromagnetic field formed on the surface of Ag NPs, the radiative recombination rate of the luminescent materials and the number of fluorescent molecules in the excited state increased. Therefore, the fluorescent emission intensity of the sandwich-structured film sensor was 1.10–1.58 times at 120–200 nm and 2.17–2.93 times at 240–360 nm that of the single-layer film sensor. A feasible method is provided for improving the detection performance of UV and VUV detectors.

#Sandwich-structured films #Localized surface plasmon resonance #Ultraviolet excitation #Fluorescence enhancement

참고문헌 (23)

참고문헌 신청

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