A high sensitivity lossy mode resonance refractive index sensor based on SBS structure

Zhang, Yizhuo; Zhang, Pengyu; Zhao, Maolin; Xu, Danping; Wang, Junxian; Li, Zhiqi; Tang, Tingting; Shen, Jian; Li, Chaoyang

doi:10.1016/j.rinp.2022.105454

Cited by 7 publications

(10 citation statements)

References 51 publications

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“…This incident light traverses free space to reach a BK7 prism hemisphere (n p = 1.5195) under angular interrogation [37]. In the context of biosensing applications, the refractive index of the sensing medium is approximately 1.38 [13,38,39]. In order to optimize the sensing performance to its fullest potential, the refractive index of the matching layer is ideally matched to the refractive index of the sensing medium, which is 1.38.…”

Section: Methodsmentioning

confidence: 99%

“…As the Kretschmann configuration is based on the principle of attenuated total reflection (ATR), the refractive index of the matching layer film should be lower than the refractive index of the prism. The LMR can be strongly excited when light penetrates the matching layer and is trapped by the lossy layer under a specific matching condition [13,14]. And the lossy layer serves as the LMR excitation medium.…”

Section: Introductionmentioning

confidence: 99%

“…Specifically, the real part ϵ r2 of the refractive index of the lossy layer is positive and is large enough (larger than the real part ϵ r3 of the refractive index of the sensing layer), and the imaginary part ϵ i2 is small enough [15]. However, a majority of existing LMR sensors struggle to excite both TM and TE waves with high sensitivity within a singular structure [13].…”

Section: Introductionmentioning

confidence: 99%

“…In 2022, Zhang et al introduced an LMR structure similar to the SPR Otto configuration, employing FLBP as the lossy layer. By leveraging the sensing material as the matching layer, this sensor's performance was significantly augmented, achieving resonant angular sensitivities between 83-420 • RIU −1 under TE light and an FOM of 9.9 × 10 5 RIU −1 for TM light [13].…”

Section: Introductionmentioning

confidence: 99%

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Lossy Mode Resonance Sensors Based on Anisotropic Few-Layer Black Phosphorus

Shen,

Zhu,

Chen

et al. 2024

Nanomaterials

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Lossy mode resonance (LMR) sensors offer a promising avenue to surpass the constraints of conventional surface plasmon resonance (SPR) sensors by delivering enhanced label-free detection capabilities. A notable edge of LMR over SPR is its excitation potential by both transverse electric (TE) and transverse magnetic (TM) polarized light. Yet this merit remains underexplored due to challenges to achieving high sensing performance under both TM and TE polarization within a singular LMR model. This study introduces a theoretical model for an LMR prism refractive index sensor based on a MgF2-few layer black phosphorus-MgF2 configuration, which can achieve angular sensitivity nearing 90∘ refractive index unit−1 (RIU−1) for both polarizations. Leveraging the distinct anisotropic nature of black phosphorus, the figure of merit (FOM) values along its two principal crystal axes (zigzag and armchair) show great difference, achieving an impressive FOM of 1.178 × 106 RIU−1 along the zigzag direction under TE polarized light and 1.231 × 104 RIU−1 along the armchair direction under TM polarized light. We also provide an analysis of the electric field distribution for each configuration at its respective resonant conditions. The proposed structure paves the way for innovative applications of anisotropic-material-based LMR sensors in various applications.

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Section: Methodsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Lossy Mode Resonance Sensors Based on Anisotropic Few-Layer Black Phosphorus

Shen,

Zhu,

Chen

et al. 2024

Nanomaterials

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“…[ 10 ] The excitation method used can be carried out with p‐ and s‐polarized light in a system coupled with optical fiber [ 11 ] or with a prism. [ 12 ] However, from our observations, the LMR sensors that have been developed to date have low sensitivity with a short dynamic range of detection. Therefore, through a computational approach, we investigate LMR‐based metal‐free sensor constructed from MoS 2 as a lossy layer and Cytop as a matching layer.…”

Section: Introductionmentioning

confidence: 92%

Molybdenum Disulfide‐based Lossy Mode Resonance Sensors: Uncovering Wider Dynamic Range and High Sensitivity Through Computational Approaches

Nurrohman,

Chiu

2024

Advcd Theory and Sims

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Until now, Surface Plasmon Resonance (SPR) biosensors still rely on gold as their transducer element, and this makes cheap analytical devices difficult to achieve. On the other hand, lossy mode resonance (LMR) sensors offer transducers with more alternative materials due to their flexibility, which can be excited in p‐ and s‐polarized light. In this research it is carried out a numerical investigation using the transfer matrix method on LMR sensor composed of molybdenum disulfide (MoS2) as lossy layer and Cytop as matching layer. The reflectance curves for different thicknesses of MoS2 and Cytop are numerically investigated. The results obtained show that the chip consisting of 250 nm Cytop and 4 layers of MoS2 has a penetration depth 3 times higher than conventional SPR chips. If sensors with two types of polarization are compared, sensors with s‐polarized light have shown higher sensitivity reaching 72.13°/RIU with a wider dynamic range starting from a refractive index of 1.331 to 1.401. In this refractive index range, this sensor has displayed good signal stability where the reduction in resonance dip depth is only ≈6%. These computational results make the proposed structure very promising to be applied in the quantification of biological materials.

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