Improving the sensitivity of guided-mode resonance sensors under oblique incidence condition

Qian, Linyong; Wang, Kangni; Bykov, Dmitry A.; Xu, Yafang; Zhu, Lin; Li, Huaming

doi:10.1364/oe.27.030563

Cited by 19 publications

(8 citation statements)

References 21 publications

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“…The larger overlap region between the electric field distribution and the analyte will contribute to the higher sensitivity. 24 As can be seen in Figure 2(B-D), two periods are illustrated by the black structural outlines. It is found that most of the resonance energy is extended to the grating ridges at 1530.87 nm, which has weaker interaction with the analyte while the other two are both concentrated in grating grooves.…”

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

confidence: 95%

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

confidence: 95%

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

Wang

Gao

et al. 2021

Micro & Optical Tech Letters

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“…In Figure 8b, the slope of the curve via linear fitting shows that the sensitivity of Si-based PCS with graphene reaches 604 nm/RIU, and its FoM can be obtained as 151. In the NIR wavelength region, the sensitivity and FoM of the Si-based PCS with graphene are larger than many nanostructured absorbers such as Si bar-ring resonator [56], Si nanoblocks [57], plasmonic nanoslit-microcavity [58], and guided-mode resonance grating [59]. Additionally, the sensing performances of the Si-based PCS with graphene are comparable with the plasmonic gold mushroom, whose FoM is comparable to the theoretical upper limit for standard propagating surface plasmon resonance sensors [60].…”

Section: Performance Analysis and Sensing Applicationmentioning

confidence: 99%

Highly Efficient Light Absorption of Monolayer Graphene by Quasi-Bound State in the Continuum

et al. 2021

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Graphene is an ideal ultrathin material for various optoelectronic devices, but poor light–graphene interaction limits its further applications particularly in the visible (Vis) to near-infrared (NIR) region. Despite tremendous efforts to improve light absorption in graphene, achieving highly efficient light absorption of monolayer graphene within a comparatively simple architecture is still urgently needed. Here, we demonstrate the interesting attribute of bound state in the continuum (BIC) for highly efficient light absorption of graphene by using a simple Si-based photonic crystal slab (PCS) with a slit. Near-perfect absorption of monolayer graphene can be realized due to high confinement of light and near-field enhancement in the Si-based PCS, where BIC turns into quasi-BIC due to the symmetry-breaking of the structure. Theoretical analysis based on the coupled mode theory (CMT) is proposed to evaluate the absorption performances of monolayer graphene integrated with the symmetry-broken PCS, which indicates that high absorption of graphene is feasible at critical coupling based on the destructive interference of transmission light. Moreover, the absorption spectra of the monolayer graphene are stable to the variations of the structural parameters, and the angular tolerances of classical incidence can be effectively improved via full conical incidence. By using the full conical incidence, the angular bandwidths for the peak absorptivity and for the central wavelength of graphene absorption can be enhanced more than five times and 2.92 times, respectively. When the Si-based PCS with graphene is used in refractive index sensors, excellent sensing performances with sensitivity of 604 nm/RIU and figure of merit (FoM) of 151 can be achieved.

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“…This slab waveguide mode is called 'leaky' as it quickly loses energy as the wave propagates. These re-radiated waves interfere with the incident waves leading to a peak in the reflection spectrum or a dip in the transmission spectrum [21,32]. A guided mode can be excited if the following inequality Equation ( 6) is satisfied [10]:…”

Section: General Theory Of Guided Mode Resonance Structuresmentioning

confidence: 99%

“…The nature of the GMR leaky modes makes them very easy to interface: The GMR grating is illuminated with a collimated beam in free space and the reflected/transmitted GMR grating signal is captured with a detector. Previous studies have demonstrated the potential of GMR gratings for use as optical modulators, filters [17], lithography [18] and biosensors [19][20][21]. Data on the use of GMR grating sensors for mechanical measurements, on the contrary, is limited.…”

Section: Introductionmentioning

confidence: 99%

Imprinted Polymer-Based Guided Mode Resonance Grating Strain Sensors

Mattelin

Missinne

Coensel

et al. 2020

Sensors

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Optical sensors based on guided mode resonance (GMR) realized in polymers are promising candidates for sensitive and cost effective strain sensors. The benefit of GMR grating sensors is the non-contact, easy optical read-out with large working distance, avoiding costly alignment and packaging procedures. The GMR gratings with resonance around 850–900 nm are fabricated using electron beam lithography and replicated using a soft stamp based imprinting technique on 175 μ m-thick foils to make them suitable for optical strain sensing. For the strain measurements, foils are realized with both GMR gratings and waveguides with Bragg gratings. The latter are used as reference sensors and allow extracting the absolute strain sensitivity of the GMR sensor foils. Following this method, it is shown that GMR gratings have an absolute strain sensitivity of 1.02 ± 0.05 pm / μ ε at 870 nm.

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Improving the sensitivity of guided-mode resonance sensors under oblique incidence condition

Cited by 19 publications

References 21 publications

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

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

Highly Efficient Light Absorption of Monolayer Graphene by Quasi-Bound State in the Continuum

Imprinted Polymer-Based Guided Mode Resonance Grating Strain Sensors

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