Grating-assisted ultra-narrow multispectral plasmonic resonances for sensing application

Li, Yuyin; Liu, Ye; Liu, Zhengqi; Tang, Qian; Shi, Leilei; Chen, Qiqi; Du, Guozhen; Wu, Biao; Liu, Guiqiang; Li, Lei

doi:10.7567/1882-0786/ab24af

Cited by 37 publications

(19 citation statements)

References 30 publications

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“…Also, a gold nano-disk array coupled to gold mirror is able to achieve high refractive index sensitivity of 853 nm/RIU and a FOM of 126 RIU −1 [13]. Sensing devices based on grating -assisted plasmonic resonances achieve a high sensitivity 404 nm/RIU and a moderate FOM of 50.3 RIU −1 [14]. Our objective is to couple incident light to SPR is aim to enhance both sensitivity and spectral resolution of plasmonic sensors and hence the FOM.…”

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confidence: 99%

Plasmonic Sensors Based on Funneling Light Through Nanophotonic Structures

2020

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We present a refractometric sensor realized as a stack of metallic gratings with subwavelength features and embedded within a low-index dielectric medium. Light is strongly confined through funneling mechanisms and excites resonances that sense the analyte medium. Two terminations of the structure are compared. One of them has a dielectric medium in contact with the analyte and exploits the selective spectral transmission of the structure. The other design has a metallic continuous layer that generates surface plasmon resonances at the metal/analyte interface. Both designs respond with narrow spectral features that are sensible to the change in the refractive index of the analyte and can be used for sensing biomedical samples.

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confidence: 99%

Plasmonic Sensors Based on Funneling Light Through Nanophotonic Structures

2020

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“…2a, b). These indicate the GMRs and cavity modes being excited [18,26]. The electric current in the GaAs nanoantennas (Fig.…”

Section: Resultsmentioning

confidence: 92%

“…At 1430 nm, the strong electric field mainly exists in the air slots near the nanoantennas (Fig. 2d) which implies the excited cavity modes [18,26]. In Fig.…”

Section: Resultsmentioning

confidence: 93%

“…Moreover, the absorption ratio to the thermal radiation is always equal to the emissivity under the thermal equilibrium conditions. Noble metallic nanostructures are usually utilized to obtain perfect absorbers, extraordinary light transmission or Fano resonances via strong coupling of light with surface plasmons [22][23][24][25][26][27][28][29][30]. However, the absorbed solar energy would lead to the increase in temperature (i.e., thermal instability), resulting in the damage of noble metallic nanostructures with low melting point [7].…”

Section: Introductionmentioning

confidence: 99%

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Semiconductor-nanoantenna-assisted solar absorber for ultra-broadband light trapping

Liu

Pan

et al. 2020

Nanoscale Res Lett

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Light trapping is an important performance of ultra-thin solar cells because it cannot only increase the optical absorption in the photoactive region but it also allows for the efficient absorption with very little materials. Semiconductor-nanoantenna has the ability to enhance light trapping and raise the transfer efficiency of solar energy. In this work, we present a solar absorber based on the gallium arsenide (GaAs) nanoantennas. Near-perfect light absorption (above 90%) is achieved in the wavelength which ranges from 468 to 2870 nm, showing an ultrabroadband and near-unity light trapping for the sun's radiation. A high short-circuit current density up to 61.947 mA/cm 2 is obtained. Moreover, the solar absorber is with good structural stability and high temperature tolerance. These offer new perspectives for achieving ultra-compact efficient photovoltaic cells and thermal emitters.

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“…This technology can detect minute refractive index (RI) change of analyte [3][4][5]; more importantly, it can identify the vibrational mode of target molecules by combining with Fourier Transform Infrared Spectrometer [2,6], which plays an increasingly important role in chemical detection, food safety, and biosensing [7][8][9]. As a kind of fundamental device for surface-enhanced infrared sensing, plasmonic perfect absorbers based on varying metallic structures have been widely employed, such as Metal-Insulator-Metal (MIM) structure [10][11][12], Vertical-Square-Split Ring (VSSR) structure [13], Semiconductor-Metal-Semiconductor (SMS) structure [14], Hybrid metasurface [15], and so on. However, the resonance spectra of these absorbers possess full width of half maximum (FWHM) far larger than tens even hundreds of nanometers, owing to the inevitable Ohmic loss of metals, especially when the working wavelength is extended to the important infrared fingerprint region [16][17][18].…”

Section: Introductionmentioning

confidence: 99%

Narrowband Perfect Absorber Based on Dielectric-Metal Metasurface for Surface-Enhanced Infrared Sensing

et al. 2020

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We proposed a narrowband perfect absorber that was based on dielectric-metal metasurface for wide-band surface-enhanced infrared sensing. It is found that the narrowband perfect absorber can generate the hybrid guided modes with high quality-factor at infrared frequencies, which make the absorber highly sensitive to the surrounded analyte. Moreover, tuning the incident angle can actively modulate the resonant wavelength of absorber. Such an absorber with excellent features is employed to realize both refractive index sensing and infrared vibrational fingerprint sensing on a single substrate. It is demonstrated that a refractive index sensitivity of 1800 nm/RIU and figure of merit of 62 RIU−1 can be obtained as the refractive index sensor. While, as a surface enhanced infrared absorption spectroscopy substrate, two closed vibrational modes of analyte with nanometer thick layers can be effectively identified and selectively detected with 50-folds enhancement by actively tuning the incident angle without any change in the structural parameters (periodicity, width, height, and refractive index of the grating) of the device after fabricating. Our study offers a promising approach for designing high-performance surface-enhanced infrared optical sensors in the infrared region.

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Grating-assisted ultra-narrow multispectral plasmonic resonances for sensing application

Cited by 37 publications

References 30 publications

Plasmonic Sensors Based on Funneling Light Through Nanophotonic Structures

Plasmonic Sensors Based on Funneling Light Through Nanophotonic Structures

Semiconductor-nanoantenna-assisted solar absorber for ultra-broadband light trapping

Narrowband Perfect Absorber Based on Dielectric-Metal Metasurface for Surface-Enhanced Infrared Sensing

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