Enhanced sensing ability in a single-layer guided-mode resonant optical biosensor with deep grating

Qian, Linyong; Wang, Kangni; Zhu, Wen; Han, Caiqin; Li, Huaming

doi:10.1016/j.optcom.2019.07.047

Cited by 35 publications

(12 citation statements)

References 24 publications

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“…[35], the opposite situation occurs. This single layer guided-mode resonant sensor in [35] features with a high FoM of 690 RIU −1 . In [36], the performance of the proposed sensor is not outstanding, however, it is insensitive to the incident wave polarization.…”

Section: Performance Comparisonmentioning

confidence: 97%

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Spectrometer-Free Graphene Plasmonics Based Refractive Index Sensor

Zhang

Farhat

Salama

2020

Sensors

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We propose a spectrometer-free refractive index sensor based on a graphene plasmonic structure. The spectrometer-free feature of the device is realized thanks to the dynamic tunability of graphene’s chemical potential, through electrostatic biasing. The proposed sensor exhibits a 1566 nm/RIU sensitivity, a 250.6 RIU−1 figure of merit in the optical mode of operation and a 713.2 meV/RIU sensitivity, a 246.8 RIU−1 figure of merit in the electrical mode of operation. This performance outlines the optimized operation of this spectrometer-free sensor that simplifies its design and can bring terahertz sensing one step closer to its practical realization, with promising applications in biosensing and/or gas sensing.

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Section: Performance Comparisonmentioning

confidence: 97%

“…This sensor can achieve a high sensitivity of 5923 nm/RIU but possesses a relatively low FoM, while in Ref. [35], the opposite situation occurs. This single layer guided-mode resonant sensor in [35] features with a high FoM of 690 RIU −1 .…”

Section: Performance Comparisonmentioning

confidence: 99%

Spectrometer-Free Graphene Plasmonics Based Refractive Index Sensor

Zhang

Farhat

Salama

2020

Sensors

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“…In addition, the penetration depth of the evanescent diffraction field is deeper with f i = 0.2. The distribution of the electric field in the top medium and the deep penetration depth with f i = 0.2 demonstrate that the MADG-based GMR sensor provides more evanescent energy for sensing, which may be responsible for the improvement in the sensitivity with the double grating structure [29]. The larger overlap area between analytes and evanescent diffraction field provided by the MADG structure has the potential to enhance the sensitivity of the techniques taking advantage of evanescent field, such as the plasmon-enhanced fluorescence method for the detection of molecules of various sizes [30,31].…”

Section: Influence Of F I On Madg Based Gmr Sensor Performancementioning

confidence: 99%

High Performance of a Metal Layer-Assisted Guided-Mode Resonance Biosensor Modulated by Double-Grating

Zhang

Zhou

et al. 2021

Biosensors

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Guided-mode resonance (GMR) sensors are widely used as biosensors with the advantages of simple structure, easy detection schemes, high efficiency, and narrow linewidth. However, their applications are limited by their relatively low sensitivity (<200 nm/RIU) and in turn low figure of merit (FOM, <100 1/RIU). Many efforts have been made to enhance the sensitivity or FOM, separately. To enhance the sensitivity and FOM simultaneously for more sensitive sensing, we proposed a metal layer-assisted double-grating (MADG) structure with the evanescent field extending to the sensing region enabled by the metal reflector layer underneath the double-grating. The influence of structural parameters was systematically investigated. Bulk sensitivity of 550.0 nm/RIU and FOM of 1571.4 1/RIU were obtained after numerical optimization. Compared with a single-grating structure, the surface sensitivity of the double-grating structure for protein adsorption increases by a factor of 2.4 times. The as-proposed MADG has a great potential to be a biosensor with high sensitivity and high accuracy.

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“…The sensitivity enhancement is discussed based on the electric field distribution. It is interesting that the enhanced electric field distribution locates in the grating grooves and will directly impinge on analytes, 23 which is beneficial to the interaction between the electric field and the glucose solution. The larger overlap region between the electric field distribution and the analyte will contribute to the higher sensitivity.…”

Section: Principle and Design Of A Dual-channel Glucose Concentration Sensormentioning

confidence: 99%

Dual‐channel glucose concentration sensor based on coupled cross‐stacked gratings

Wang

Gao

et al. 2021

Micro & Optical Tech Letters

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A dual-channel glucose concentration sensor based on coupled cross-stacked gratings is proposed. When the concentration of glucose solution is varied from 30 to 60 g/100 ml, the maximum values of the bulk sensitivity for peaks at longer and shorter resonance wavelength indicate approximately 615.57 and 262.94 nm/ RIU, respectively. Therefore, the sensitivity of channel at longer wavelength is increased by 234.42% compared with that of the shorter wavelength. Advantageously, the dual-channel sensor with different sensitivities can reduce measurement errors and noise effectively such as background noise and the fluctuation of the light source.

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Enhanced sensing ability in a single-layer guided-mode resonant optical biosensor with deep grating

Cited by 35 publications

References 24 publications

Spectrometer-Free Graphene Plasmonics Based Refractive Index Sensor

Spectrometer-Free Graphene Plasmonics Based Refractive Index Sensor

High Performance of a Metal Layer-Assisted Guided-Mode Resonance Biosensor Modulated by Double-Grating

Dual‐channel glucose concentration sensor based on coupled cross‐stacked gratings

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