Simulation and optimization of multilayer-coated microsphere in temperature and refractive index sensing

Dong, Yongchao; Wang, Keyi; Jin, Xueying

doi:10.1016/j.optcom.2015.01.050

Cited by 11 publications

(2 citation statements)

References 36 publications

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“…This may be attributed to the existence of the SPR very close to the right PBG edge which increases the spectral sensitivity and quality factors of right edge peak resulting in substantial enhancement of refractive index sensitivity. These sensitivities are better than that previously reported for photonic crystal fiber tip interferometer (11.5 nm/RIU over the RI range of 1.33–1.40) 12 , microfiber device (30.49 nm/RIU over the RI range of 1.334–1.348) 40 , Mach-Zehnder interferometer (15–40 nm/RIU) 41 42 43 , multilayer coated microsphere (maximum, 12.16 nm/RIU) 44 , and fiber grating sensor (below 5 nm/RIU) 45 . However, theoretical studies using finite different time domain (FDTD), COMSOL showed higher sensitivity than that shown here for more complicated proposed structures.…”

Section: Resultsmentioning

confidence: 58%

Tunability and Sensing Properties of Plasmonic/1D Photonic Crystal

Shaban

Ahmed

Abdel‐Rahman

et al. 2017

Sci Rep

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Gold/one-dimensional photonic crystal (Au/1D-PC) is fabricated and applied for sensitive sensing of glucose and different chemical molecules of various refractive indices. The Au layer thickness is optimized to produce surface plasmon resonance (SPR) at the right edge of the photonic band gap (PBG). As the Au deposition time increased to 60 sec, the PBG width is increased from 46 to 86 nm in correlation with the behavior of the SPR. The selectivity of the optimized Au/1D-PC sensor is tested upon the increase of the environmental refractive index of the detected molecules. The resonance wavelength and the PBG edges increased linearly and the transmitted intensity increased nonlinearly as the environment refractive index increased. The SPR splits to two modes during the detection of chloroform molecules based on the localized capacitive coupling of Au particles. Also, this structure shows high sensitivity at different glucose concentrations. The PBG and SPR are shifted to longer wavelengths, and PBG width is decreased linearly with a rate of 16.04 Å/(μg/mm3) as the glucose concentration increased. The proposed structure merits; operation at room temperature, compact size, and easy fabrication; suggest that the proposed structure can be efficiently used for the biomedical and chemical application.

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Section: Resultsmentioning

confidence: 58%

Tunability and Sensing Properties of Plasmonic/1D Photonic Crystal

Shaban

Ahmed

Abdel‐Rahman

et al. 2017

Sci Rep

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“…Due to the advantages of high-quality factor and low mode volume, the whispering gallery mode (WGM) microresonators have great potential for growth in many research and technology fields. In particular, WGM resonators have been extensively investigated and used in sensor fields over the last decade [1][2][3], such as biochemical substances detection [4,5], refractive index sensing [6,7], pressure monitoring [8,9], and displacement sensing [10][11][12][13][14]. In the study of displacement sensing, two conventional mechanisms have attracted widespread interest.…”

Section: Introductionmentioning

confidence: 99%

Simulation and Optimization of SNAP-Taper Coupling System in Displacement Sensing

Chen

Dong

Wang

et al. 2021

Sensors

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Sensing applications based on whispering gallery mode (WGM) microcavities have attracted extensive attention recently, especially in displacement sensing applications. However, the traditional displacement sensing scheme based on shift in a single resonance wavelength, has a lot of drawbacks. Herein, a novel displacement sensing scheme based on the surface nanoscale axial photonics (SNAP) is proposed to achieve a wide range and high-resolution displacement sensor through analyzing the transmittance of multiple axial modes. By analyzing the surface plot of the resonance spectrum with different coupling positions, the ideal coupling parameters and ERV for displacement sensing are obtained. In the following, displacement sensing with high sensitivity and a wide range is theoretically realized through adjusting the sensitivity threshold and the number of modes. Finally, we present our views on the current challenges and the future development of the displacement sensing based on an SNAP resonator. We believe that a comprehensive understanding on this sensing scheme would significantly contribute to the advancement of the SNAP resonator for a broad range of applications.

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