Metasurface generated polarization insensitive Fano resonance for high-performance refractive index sensing

Liu, Huigang; Zheng, Li; Ma, Pingzhun; Zhong, Ying; Liu, Bo; Chen, Xianzhong; Liu, Haitao

doi:10.1364/oe.27.013252

Cited by 44 publications

(13 citation statements)

References 45 publications

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“…As shown in Figure 1a, we propose a metal and dielectric hybrid metasurface. The metal and dielectric are chosen to be Au and TiO 2 , respectively, and the substrate is glass, the permittivity of Au, TiO 2 , and glass reference to the related articles [35,55]. Figure 1b,c show the x-z plane view and x-y plane view of the proposed hybrid metasurface.…”

Section: Structure and Theory Modelmentioning

confidence: 99%

“…Tang et al investigated sensing applications based on high-Q Fano resonances in graphene coupled systems [52]. Liu et al reported high performance of refractive index sensing in the TiO 2 metasurface generated by the polarization insensitive Fano resonance [55]. Due to the strong optical fields binding characteristics of SPs, the metal and dielectric hybrid metasurface will enhance the sensitivity of the sensor based on Fano resonances.…”

Section: Introductionmentioning

confidence: 99%

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Tunable Fano Resonance and Enhanced Sensing in a Simple Au/TiO2 Hybrid Metasurface

Xue

Cui

et al. 2020

Nanomaterials

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We investigate Fano resonances and sensing enhancements in a simple Au/TiO2 hybrid metasurface through the finite-different time-domain (FDTD) simulation and coupled mode theory (CMT) analysis. The results show that the Fano resonance in the proposed simple metasurface is caused by the destructive interaction between the surface plasmon polaritons (SPPs) and the local surface plasmon resonances (LSPRs), the quality factor and dephasing time for the Fano resonance can be effectively tuned by the thickness of Au and TiO2 structures, the length of each unit in x and y directions, as well as the structural defect. In particular, single Fano resonance splits into multiple Fano resonances caused by a stub-shaped defect, and multiple Fano resonances can be tuned by the size and position of the stub-shaped defect. Moreover, we also find that the sensitivity in the Au/TiO2 hybrid metasurface with the stub-shaped defect can reach up to 330 nm/RIU and 535 nm/RIU at the Fano resonance 1 and Fano resonance 2, which is more than three times as sensitive in the Au/TiO2 hybrid metasurface without the stub-shaped defect, and also higher than that in the TiO2 metasurface reported before. These results may provide further understanding of Fano resonances and guidance for designing ultra-high sensitive refractive index sensors.

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Section: Structure and Theory Modelmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Tunable Fano Resonance and Enhanced Sensing in a Simple Au/TiO2 Hybrid Metasurface

Xue

Cui

et al. 2020

Nanomaterials

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“…Therefore, the presented bilayer grating structure can maintain the function of polarization-selective bidirectional absorption within an incident angle up to 30°. The excited Fano-like resonance mode of the absorber at oblique incidence is conducive to the optical sensing application [ 29 , 30 , 31 , 32 , 33 , 34 ].…”

Section: Discussionmentioning

confidence: 99%

Polarization-Selective Bidirectional Absorption Based on a Bilayer Plasmonic Metasurface

Chen

et al. 2020

Materials

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We propose an alignment-free and polarization-selective bidirectional absorber composed of a one-dimensional bilayer Au grating array buried in a silicon nitride spacer. The absorptivity of the designed structure is more than 95% (77%) under normal forward (backward) TM-polarized light incidence, and is more than 80% (70%) within a forward (backward) incident angle up to 30°. The great bidirectional absorption performance is illustrated by the resonance coupling of the surface plasmon polaritons (SPPs) resonance, the propagating surface plasmon (PSP) resonance and the localized surface plasmon (LSP) resonance under TM-polarized wave illumination. Moreover, the excitation of the Fano-like resonance mode of the proposed metasurface can produce two significantly different peaks in the absorption spectrum under the oblique TM-polarized incidence, which is beneficial for the plasmon-sensing application. Therefore, the proposed bidirectional metasurface absorber can be a candidate in the application of optical camouflage, thermal radiation, solar cells and optical sensing.

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“…This method provides a new way to measure the phase difference between two orthogonally polarized light, which may bring out more compact polarization measurement devices. Optical sensors based on metamaterials or metasurfaces are widely used in detecting low concentration molecules [285][286][287][288][289][290][291] and small refractive index changes of surrounding mediums [292][293][294][295][296] . Most of these optical sensors are based on the strong resonance and local field enhancement of nanostructures, which can improve the sensitivity of optical responses to the changes of the surroundings.…”

Section: Applications In Wave Field Manipulations Applications In Em mentioning

confidence: 99%

Multidimensional manipulation of wave fields based on artificial microstructures

Zhang¹,

Liu²,

Cheng³

et al. 2020

Opto-Electronic Advances

114

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Artificial microstructures, which allow us to control and change the properties of wave fields through changing the geometrical parameters and the arrangements of microstructures, have attracted plenty of attentions in the past few decades. Some artificial microstructure based research areas, such as metamaterials, metasurfaces and phononic topological insulators, have seen numerous novel applications and phenomena. The manipulation of different dimensions (phase, amplitude, frequency or polarization) of wave fields, particularly, can be easily achieved at subwavelength scales by metasurfaces. In this review, we focus on the recent developments of wave field manipulations based on artificial microstructures and classify some important applications from the viewpoint of different dimensional manipulations of wave fields. The development tendency of wave field manipulation from single-dimension to multidimensions provides a useful guide for researchers to realize miniaturized and integrated optical and acoustic devices.

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Metasurface generated polarization insensitive Fano resonance for high-performance refractive index sensing

Cited by 44 publications

References 45 publications

Tunable Fano Resonance and Enhanced Sensing in a Simple Au/TiO2 Hybrid Metasurface

Tunable Fano Resonance and Enhanced Sensing in a Simple Au/TiO2 Hybrid Metasurface

Polarization-Selective Bidirectional Absorption Based on a Bilayer Plasmonic Metasurface

Multidimensional manipulation of wave fields based on artificial microstructures

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