Effective excitation of bulk plasmon-polaritons in hyperbolic metamaterials for high-sensitivity refractive index sensing

Yan, Ruoqin; Wang, Tao; Wang, Huimin; Yue, Xinzhao; Wang, Lu; Wang, Yuandong; Zhang, Jinyan

doi:10.1039/d1tc06114c

Cited by 14 publications

(8 citation statements)

References 48 publications

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“…The corresponding FOM values were 5417/RIU and 357/RIU. The evanescent field in q = 1 mode was longer than that in q = 2 mode [43]. The q = 1 mode at a wavelength of 1155 nm is much more sensitive than the q = 2 mode at a wavelength of 577 nm in the PWR-HMM structure.…”

Section: Resultsmentioning

confidence: 87%

Coupling plasmon-waveguide resonance and multiple plasma modes in hyperbolic metamaterials for high-performance sensing

Wang¹,

Wang²,

Yan³

et al. 2022

Nanotechnology

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A sensor based on plasmon-waveguide resonance (PWR) exhibits an impressive narrow linewidth and has attracted extensive attention in plasmon label-free sensing. However, the low surface electric field intensity limits the detection ability of biomolecules, where the refractive index changes are restricted at the sensor surface. In this study, we study the coupling of PWR and multiple plasma modes in a hyperbolic metamaterial (HMM), combining narrow line width and electric field enhancement advantages. The PWR-HMM sensor includes a gold film, lossless dielectric layer, and metal/dielectric multilayer HMM array composed of 2-layer Au/Al2O3 stacks. The evanescent field of PWR is used to excite multiple plasma modes in the HMM. The figure of merit of the proposed structure reaches 5417 /RIU owing to the existence of lossless dielectric layer, which is 11.7 times than the conventional gold film structure. The maximum bulk sensitivity of the PWR-HMM sensor was 43,000 nm/RIU. In comparison with PWR, the surface electric field intensity and the surface sensitivity of PWR-HMM increase by four and two times, respectively. Furthermore, comparing the sensing performance of the PWR-HMM sensor and PWR-nanoparticle (NP) sensor (coupling PWR and localized surface plasmon resonance), it was found that PWR-HMM has 20% higher surface sensitivity than the PWR-NP. A sensing mechanism coupling PWR and multiple plasma modes in the HMMs opens a gate to significantly improve the PWR sensors performance, which is expected to be used to resolve urgent issues in biological, medical and clinical applications.

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Section: Resultsmentioning

confidence: 87%

Coupling plasmon-waveguide resonance and multiple plasma modes in hyperbolic metamaterials for high-performance sensing

Wang¹,

Wang²,

Yan³

et al. 2022

Nanotechnology

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“…[41,42] Based upon EMA theory, our Ag NW-Si metamaterial films present the opposite signs between Re(𝜖 eff,x ) (perpendicular to the nanowires) and Re(𝜖 eff,z ) (parallel to the nanowires) over the whole 2-10 μm range, exhibiting a hyperbolic-dispersion characteristic, as shown in Figure S8e, Supporting Information. Based upon the dispersion equation (the relationship between wave vector and dielectric constant), [43] the NW-based hyperbolic metamaterials can support a wave vector in z-direction with a real number in the case of plasmon resonance excitation, suggesting that surface plasmon polariton (SPP) wave can propagate directly along z direction in Ag NW arrays. The back-and-forth SPPs interfere within nanocavity, supporting BPP modes at resonant wavelengths.…”

Section: Modeling and Measuring The Optical Performance Of Ag Nw-base...mentioning

confidence: 99%

Vertically‐Aligned Ag Nanowire Array‐Based Metamaterial with High Refractive Index and Low‐Dispersion in the Infrared Band

Chen,

Gao,

Wang

et al. 2023

Advanced Optical Materials

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To open new vistas for designing nanophotonic systems, exploiting high refractive index (RI) availability is now drawing attention worldwide, especially in the visible‐infrared range. Based upon the nanoscale close‐packed arrangement of metallic nano‐units, few optical‐frequency metamaterials with high RIs have been demonstrated. However, there are still significant challenges in their RI promotion, tuneability, and integrated preparation for practical applications. Herein, a novel Ag nanowire‐based metamaterial scheme is put forward, in which vertically aligned Ag nanowire (NW) array embedded‐Si or ‐Ge composites are made. Thanks to flexible control on microstructure parameters of Ag NWs (meta‐unit) and their dielectric environment, the synergistic effect of enhanced capacitive coupling and weakened diamagnetic response is created, leading to a recorded near‐infrared high‐RI of ≈7.2, low‐dispersion from 2 to 10 µm, and customizable RIs. Further, an air nanohole array‐Si composite layer, acting as an impedance matching layer, is utilized to realize the transmittance increase of the metamaterial film by ≈50% at specific wavelengths, along with the bulk plasmon‐polariton (BPP) modes resonances in the interwire nanocavities. This approach to increasing the infrared refractive index can circumvent physical effect conflict in high RI metamaterials and pave a basis for future scalable and on‐demand photonic applications.

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“…For d c ≥ 300 nm, the multilayer HM exhibits a minimal increase in absorption compared to a compact film of ITO, acting essentially as a pure metal (the bottom dotted gray line in Figure ). Conversely, for thicknesses between 300 and 50 nm, the system displays some enhancement in absorption, resulting from the excitation of so-called bulk plasmon polaritons (BPPs). ,− BPPs are high- k modes consisting of gap plasmons forming a bulk-like plasmonic excitation. Using the notations of eq , BPP modes travel almost exclusively along the metal–dielectric interfaces ( x -direction), with the electric field interacting through ε zz .…”

Section: Introductionmentioning

confidence: 99%

Coupling into Hyperbolic Carbon-Nanotube Films with a Deep-Etched Antenna Grating

Jerome,

Prasad,

Schirato

et al. 2023

ACS Photonics

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Effective excitation of bulk plasmon-polaritons in hyperbolic metamaterials for high-sensitivity refractive index sensing

Abstract: The study of hyperbolic metamaterial (HMM) refractive index sensors is an active field of plasmonics and nanophotonics, and the effective excitation of the bulk plasmon-polariton (BPP) modes in anisotropic HMM...

Cited by 14 publications

References 48 publications

Coupling plasmon-waveguide resonance and multiple plasma modes in hyperbolic metamaterials for high-performance sensing

Coupling plasmon-waveguide resonance and multiple plasma modes in hyperbolic metamaterials for high-performance sensing

Vertically‐Aligned Ag Nanowire Array‐Based Metamaterial with High Refractive Index and Low‐Dispersion in the Infrared Band

Coupling into Hyperbolic Carbon-Nanotube Films with a Deep-Etched Antenna Grating

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