Tunable Optical Performances on a Periodic Array of Plasmonic Bowtie Nanoantennas with Hollow Cavities

Chau, Yuan-Fong Chou; Chao, Chung-Ting Chou; Rao, Jhin-Yu; Chiang, Hai‐Pang; Lim, Chee Ming; Lim, Ren Chong; Voo, Nyuk Yoong

doi:10.1186/s11671-016-1636-x

Cited by 49 publications

(12 citation statements)

References 38 publications

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“…These SPP modes are due to the cavity plasmon resonance (CPR) and surface plasmon resonance (SPR) arising from the coupling effect between the six circular cavities and the bus waveguide 60 . The interference of SPR and CPR cause the multichannel SPPs modes between bus waveguides and circular cavities 8 , 61 , 62 , leading to eleven available SPPs modes in the wavelength of 350–700 nm. We found that CPR plays a pivotal role in offering more plasmon resonance in the proposed color filter system.…”

Section: Design Of a Multichannel Plasmonic Color Filtermentioning

confidence: 99%

A multichannel color filter with the functions of optical sensor and switch

Chau

Chao

Huang

et al. 2021

Sci Rep

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This paper reports a multichannel color filter with the functions of optical sensor and switch. The proposed structure comprises a metal–insulator–metal (MIM) bus waveguide side-couples to six circular cavities with different sizes for filtering ultra-violet and visible lights into individual colors in the wavelength range of 350–700 nm. We used the finite element method to analyze the electromagnetic field distributions and transmittance properties by varying the structural parameters in detail. The designed plasmonic filter takes advantage of filtering out different colors since the light-matter resonance and interference between the surface plasmon polaritons (SPPs) modes within the six cavities. Results show that the designed structure can preferentially select the desired colors and confine the SPPS modes in one of the cavities. This designed structure can filter eleven color channels with a small full width at half maximum (FWHM) ~ 2 nm. Furthermore, the maximum values of sensitivity, figure of merit, quality factor, dipping strength, and extinction ratio can achieve of 700 nm/RIU, 350 1/RIU, 349.0, 65.04%, and 174.50 dB, respectively, revealing the excellent functions of sensor performance and optical switch, and offering a chance for designing a beneficial nanophotonic device.

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Section: Design Of a Multichannel Plasmonic Color Filtermentioning

confidence: 99%

A multichannel color filter with the functions of optical sensor and switch

Chau

Chao

Huang

et al. 2021

Sci Rep

Self Cite

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“…The "interaction" concept of binding responses detected by SPR is with wide range of analytes including proteins (ligands, receptors, antibodies), nucleotides, small molecules, nanoparticles and even intact live cells. Therefore, SPR application can be further ex-pended to new drug discovery [27][28][29][30][31][32]. Many advantages of SPR in biomedical applications have been reported, such as label-free assay and real-time detection of nano-scale molecular interactions at very low concentrations (~pM) [33].…”

Section: Introductionmentioning

confidence: 99%

Measurement of Low Concentration of Micro-Plastics by Detection of Bioaffinity-Induced Particle Retention Using Surface Plasmon Resonance Biosensors

et al. 2021

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The issue of micro-plastics is becoming more and more important due to their ubiquity and the harm they cause to the human body. Therefore, evaluating the biological–physical interaction of micro-plastics with health cells has become the focus of many research efforts. This study focuses on the movement mode and low concentration detection development for micro-plastics in surface plasmon resonance (SPR). Firstly, 20-micrometer micro-plastics were prepared by grinding and filtering, and the movement mode was explored; then, the characteristics were investigated by SPR. Chromatographic analysis showed that the surface charge of micro-plastics dominated the elution time, and estrogen receptors (ERs) played a supporting role. A difference of micro-plastics in SPR sensorgram was observed, inferring the micro-plastics’ movement in rolling mode on the ERs. Characteristics analysis indicated that the low particle number of micro-plastics on SPR showed a linear relationship with the response unit (RU). When ERs were immobilized on the biosensor, the force of the binding of micro-plastics to ERs under an ultra-low background was equivalent to the dissociation rate constant shown as follows: PS (0.05 nM) > PVC (0.09 nM) > PE (0.14 nM). The ELISA-like magnetic beads experiment verified the specificity between ERs and micro-plastics. Therefore, by using the SPR technique, a biological-derived over-occupation of PS was found via higher binding force with ERs and longer retention time. In the future, there will be considerable potential for micro-plastics issues, such as identification in natural samples, biomarking, real-time detection in specific environments/regions and human health subject.

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“…Thus, SiO 2 @Au@Ag alloy exhibits a surface-enhanced Raman scattering (SERS) enhancement of 4.2 × 10 6 with high reproducibility. The designing of an NP structure can be critical for SERS enhancement [28][29][30][31][32][33]. The SERS enhancement of the SiO 2 @Au@Ag alloy NPs is due to the enhancement of the cavity plasmon resonance and the variation of the refractive index of nanomaterials, by lead shifting the operation wavelength and enhancing the local electromagnetic fields of the hotspot region [29,30,33].…”

Section: Introductionmentioning

confidence: 99%

Nonenzymatic Hydrogen Peroxide Detection Using Surface-Enhanced Raman Scattering of Gold–Silver Core–Shell-Assembled Silica Nanostructures

et al. 2021

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Hydrogen peroxide (H2O2) plays important roles in cellular signaling and in industry. Thus, the accurate detection of H2O2 is critical for its application. Unfortunately, the direct detection of H2O2 by surface-enhanced Raman spectroscopy (SERS) is not possible because of its low Raman cross section. Therefore, the detection of H2O2 via the presence of an intermediary such as 3,3,5,5-tetramethylbenzidine (TMB) has recently been developed. In this study, the peroxidase-mimicking activity of gold–silver core–shell-assembled silica nanostructures (SiO2@Au@Ag alloy NPs) in the presence of TMB was investigated using SERS for detecting H2O2. In the presence of H2O2, the SiO2@Au@Ag alloy catalyzed the conversion of TMB to oxidized TMB, which was absorbed onto the surface of the SiO2@Au@Ag alloy. The SERS characteristics of the alloy in the TMB–H2O2 mixture were investigated. The evaluation of the SERS band to determine the H2O2 level utilized the SERS intensity of oxidized TMB bands. Moreover, the optimal conditions for H2O2 detection using SiO2@Au@Ag alloy included incubating 20 µg/mL SiO2@Au@Ag alloy NPs with 0.8 mM TMB for 15 min and measuring the Raman signal at 400 µg/mL SiO2@Au@Ag alloy NPs.

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Tunable Optical Performances on a Periodic Array of Plasmonic Bowtie Nanoantennas with Hollow Cavities

Cited by 49 publications

References 38 publications

A multichannel color filter with the functions of optical sensor and switch

A multichannel color filter with the functions of optical sensor and switch

Measurement of Low Concentration of Micro-Plastics by Detection of Bioaffinity-Induced Particle Retention Using Surface Plasmon Resonance Biosensors

Nonenzymatic Hydrogen Peroxide Detection Using Surface-Enhanced Raman Scattering of Gold–Silver Core–Shell-Assembled Silica Nanostructures

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