Optical Fano resonance sensing of bilayer asymmetric photonic crystal slabs as biosensors

Ge, Daohan; Shi, Jianpei; Rezk, Ahmed; Zhang, Yuan; Wei, Jinxiu; Zhang, Liqiang; Zhu, Shining

doi:10.1364/ao.58.003187

Cited by 15 publications

(8 citation statements)

References 29 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Lossless materials (i.e., those with zero values for extinction coefficients κ) are assumed in most numerical simulations [24, 25, 30]. Sinibaldi et al [36] studied the influence of material losses on the performance of the BSW sensors to find that the extinction coefficient of high index layers κ H only slightly affects the resonance characteristics; they introduced an extinction κ L = 10 −4 to the low index layers calculated via transfer matrix method (TMM).…”

Section: Resultsmentioning

confidence: 99%

See 1 more Smart Citation

Two-Dimensional Hole-Array Grating-Coupling-Based Excitation of Bloch Surface Waves for Highly Sensitive Biosensing

Shi

Rezk

et al. 2019

Nanoscale Res Lett

Self Cite

View full text Add to dashboard Cite

In this study, a surface diffraction two-dimensional (2D) grating structure was placed on the topmost layer of distributed Bragg reflectors (DBRs) for biosensing. Bloch surface wave (BSW) resonance was realized by coupling a 2D subwavelength hole-array grating and could be excited at different locations: the surface of 2D-grating layer or the inter-face between the DBR and bio-solution. Material losses in the multilayer dielectric were measured to test the robustness of this scheme. Both the surface diffraction-grating BSW (DG-BSW) and the alternative guided grating-coupled BSW (GC-BSW) configuration showed markedly enhanced angular sensitivity compared to conventional prism-coupled schematics. Exciting these modes using a grating-coupling technique appears to yield different extreme sensitivity modes with a maximum of 1190°/RIU for DG-BSW and 2255°/RIU for GC-BSW. Refractive index sensors with a high figure of merit may be realized via such compact configurations.

show abstract

Section: Resultsmentioning

confidence: 99%

“…Two-dimensional (2D) grating devices [28–30] have attractive potential as miniature RI sensors due to their large sensing areas and relative ease of fabrication. This paper proposes an alternative excitation scheme based on the 2D grating-coupling mechanism.…”

Section: Introductionmentioning

confidence: 99%

Two-Dimensional Hole-Array Grating-Coupling-Based Excitation of Bloch Surface Waves for Highly Sensitive Biosensing

Shi

Rezk

et al. 2019

Nanoscale Res Lett

Self Cite

View full text Add to dashboard Cite

show abstract

“…20 The structure of BSW sensors primarily falls into two categories: distributed Bragg reflectors (DBRs) constructed by alternating high and low refractive index materials 21 and photonic crystal slabs with various hole patterns. 22 Literature suggests that introducing a top dielectric defect layer into the BSW sensor structure can enhance the sensor's performance. For instance, Goyal et al reported a high-sensitivity refractive index sensor utilizing a TiO 2 and SiO 2 composite material as a defect layer for detecting hemoglobin concentration.…”

Section: Introductionmentioning

confidence: 99%

Design and optimization of Bloch surface wave sensor with high sensitivity and quality factor using LiNbO3

Wei,

Shi,

Liu

et al. 2024

J. Nanophoton.

View full text Add to dashboard Cite

This work presents a refractive index sensor based on Bloch surface waves (BSW) with high sensitivity and quality factor (Q). The sensor utilizes a one-dimensional photonic crystal TiO 2 ∕MgF 2 as a distributed Bragg reflector and employs a LiNbO 3 thin film as the top defect layer to excite BSW through a Kretschmann prism. Numerical simulations using the rigorous coupled wave analysis method are conducted to explore various prism configurations, revealing that low refractive index prisms yield superior performance for BSW sensors. The designed sensor achieves a sensitivity of 1600 nm/RIU (or 938 °/RIU) and is analyzed for its full-width at halfmaximum and quality factor (Q), with the sensor's Q value reaching 8000 /RIU (or 13595 /RIU). Through manufacturing error analysis, it was found that the designed sensor has good mechanical robustness, is easy to manufacture, and is also easy to integrate. The results show that the LiNbO 3 nonlinear tunable material has great application prospects in the field of refractive index sensors.

show abstract

“…As BSW does not use the precious metals, the resulting reflection spectrum curve is sharper, [20,21] quality factor higher and can be used for biosensing, [22] gassensing [23] and enhanced fluorescence emission. [24] The photonic crystal plate [25] and distributed Bragg reflector (DBR) structure are widely used in present photonic crystal sensor designs. The DBR is a multilayer structure formed by alternating low and high refractive index (RI) media.…”

Section: Introductionmentioning

confidence: 99%

High-sensitivity Bloch surface wave sensor with Fano resonance in grating-coupled multilayer structures

Ge¹,

Zhou²,

Lv³

et al. 2022

Chinese Phys. B

Self Cite

View full text Add to dashboard Cite

A new type of device consisting of a lithium niobate film coupled with a distributed Bragg reflector (DBR) was theoretically proposed to explore and release Bloch surface waves for applications in sensing and detection. The film and grating made of lithium niobate (LiNbO3) were placed on both sides of the DBR and a concentrated electromagnetic field was formed at the film layer. By adjusting the spatial incidence angle of the incident light, two detection and analysis modes were obtained, including surface diffraction detection and guided Bloch detection. Surface diffraction detection was used to detect the gas molecule concentrations, while guided Bloch detection was applied for the concentration detection of biomolecule-modulated biological solutions. According to the drift of the Fano curve, the average sensor sensitivities from the analysis of the two modes were 1560 °/RIU and 1161 °/RIU, and the maximum detection sensitivity reached 2320 °/RIU and 2200 °/RIU, respectively. This study revealed the potential application of LiNbO3 as a tunable material when combined with DBR to construct a new type of biosensor, which offered broad application prospects in Bloch surface wave biosensors.

show abstract

Optical Fano resonance sensing of bilayer asymmetric photonic crystal slabs as biosensors

Cited by 15 publications

References 29 publications

Two-Dimensional Hole-Array Grating-Coupling-Based Excitation of Bloch Surface Waves for Highly Sensitive Biosensing

Two-Dimensional Hole-Array Grating-Coupling-Based Excitation of Bloch Surface Waves for Highly Sensitive Biosensing

Design and optimization of Bloch surface wave sensor with high sensitivity and quality factor using LiNbO3

High-sensitivity Bloch surface wave sensor with Fano resonance in grating-coupled multilayer structures

Contact Info

Product

Resources

About