Effects of Coherent Interactions on the Sensing Characteristics of Near-Infrared Gold Nanorings

Jiang, Hao; Sabarinathan, Jayshri

doi:10.1021/jp1003598

Cited by 49 publications

(57 citation statements)

References 38 publications

(124 reference statements)

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“…This number is similar to previously reported wavelength-shift sensitivity for many nanoplasmonic structures reported thus far [25] (e.g. 400 nm/RIU (@1600 nm) for nanopatterns [26], 637 nm/RIU (@300-1800 nm) for nanoparticles [27], 300∼560 nm/RIU (@600-900 nm) for nanoslit arrays [28], 600 nm/RIU (@1460 nm) for disk resonator [29], ∼1500 nm/RIU (@1550 nm) for nanohole arrays [24], [30], etc.). However, it should be noted that the FWHM of the launched SPP mode under this coupling mechanism is relatively sharp [e.g.…”

Section: Numerical Simulation Of Optical Sensingsupporting

confidence: 91%

Dielectric-Grating-Coupled Surface Plasmon Resonance From the Back Side of the Metal Film for Ultrasensitive Sensing

Zeng

Zhang

et al. 2016

IEEE Photonics J.

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We propose a dielectric grating that can launch surface plasmon resonance (SPR) modes efficiently on the other side of flat metal films, which is similar to the conventional prism coupling mechanism. Importantly, this structure can excite SPR under the normal incident light, which is particularly suitable for the integration with optical fiber tips. By launching the SPR mode near the wavelength of 1.55 m with a very narrow resonance line width (∼4 nm), this structure is promising for the development of highperformance portable, flexible, and real-time refractometric sensing applications.

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Section: Numerical Simulation Of Optical Sensingsupporting

confidence: 91%

Dielectric-Grating-Coupled Surface Plasmon Resonance From the Back Side of the Metal Film for Ultrasensitive Sensing

Zeng

Zhang

et al. 2016

IEEE Photonics J.

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“…5(g-h)], which agrees with the results of the evanescent mode in Ref. 28; the ∆ FWHM under transverse polarization is always smaller than that under longitudinal polarization, which coincides with the results in Ref. 20.…”

Section: Calculation Resultssupporting

confidence: 91%

The local surface plasmon resonance property and refractive index sensitivity of metal elliptical nano-ring arrays

Lin

Wang

et al. 2014

AIP Advances

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In this paper, we systematically investigate the optical property and refractive index sensitivity (RIS) of metal elliptical nano-ring (MENR) arranged in rectangle lattice by finite-difference time-domain method. Eight kinds of considered MENRs are divided into three classes, namely fixed at the same outer size, at the same inner size, and at the same middle size. All MENR arrays show a bonding mode local surface plasmon resonance (LSPR) peak in the near-infrared region under longitudinal and transverse polarizations, and lattice diffraction enhanced LSPR peaks emerge, when the LSPR peak wavelength (LSPRPW) matches the effective lattice constant of the array. The LSPRPW is determined by the charge moving path length, the parallel and cross interactions induced by the stable distributed charges, and the moving charges inter-attraction. High RIS can be achieved by small particle distance arrays composed of MENRs with big inner size and small ring-width. On the other hand, for a MENR array, the comprehensive RIS (including RIS and figure of merit) under transverse polarization is superior to that under longitudinal polarization. Furthermore, on condition that compared arrays are fixed at the same lattice constant, the phenomenon that the RIS of big ring-width MENR arrays may be higher than that of small ring-width MENR arrays only appears in the case of compared arrays with relatively small lattice constant and composed of MENRs fixed at the same inner size simultaneously. Meanwhile, the LSPRPW of the former MENR arrays is also larger than that of the latter MENR arrays. Our systematic results may help experimentalists work with this type of systems.

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“…In addition, array types can offer extra spectral tunability and sensitivity enhancement. Therefore, the gold NR arrays with the obtained sensitivity up to 691 nm per RIU can be further improved by optimizing the NR array geometry 29 and reducing the substrate effect. 30 In summary, in this report, we demonstrate a plasmonic index sensor based on square lattice slablike gold NR array.…”

mentioning

confidence: 99%

High sensitivity plasmonic index sensor using slablike gold nanoring arrays

Tsai¹,

Lu²,

Lin³

et al. 2011

Applied Physics Letters

123

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We investigate the index sensing characteristics of plasmonic arrays based on square lattice slablike gold nanorings ͑NRs͒ with different ring widths. The gold NR arrays exhibit two extinction peaks in the visible and near-infrared corresponding to antibonding and bonding modes. Redshift and blueshift in antibonding and bonding modes when broadening the average ring width are observed. We experimentally demonstrate the sensitivity of bonding mode can be tuned by varying the average ring width. However, the sensing performance is limited because the enhanced fields concentrate inside the shell-like structures. The nanoring ͑NR͒ structure surmounts this limitation due to the extension of inside field to the environment. This leads to significant increase in the detection sensitivity. 20 The NR plasmonic properties can be seen as the electromagnetic interaction between the nanodisc and the nanohole plasmons. [21][22][23] This results in the splitting of the plasmon mode into two resonance modes, which are the low energy "bonding" mode and the high energy "antibonding" mode. The resonance frequencies of both resonance modes can be easily tuned in the visible ͑VIS͒ and NIR range by adjusting the geometry of NR, which is useful for various optical sensing applications.In this letter, we report our experimental investigation of bonding and antibonding modes in plasmonic arrays based on square lattice slablike gold NRs with different ring widths. The refractive index sensing experiments of such structures are performed by immersing the samples in index matching liquids. We show that the sensitivities of NR arrays exhibit a linear relationship with ring widths for the bonding mode in the NIR regime. These results are crucial in designing LSP resonance ͑LSPR͒ sensors based on periodic metallic nanostructures.The scheme of square lattice gold NR array with ring thickness t, periodicity p, diameter d, and average width w is shown in Fig. 1͑a͒. The periodicity, diameter, and thickness are fixed at 1 m, 500 nm, and 50 nm. In fabrication, the ITO glass is utilized as the substrate to avoid the charge accumulation effect during electron beam lithography ͑EBL͒. First, the ITO glass was spin-coated a 150 nm polymethylmethacrylate ͑PMMA͒ layer. The NR patterns with area of 300ϫ 300 m 2 and different ring widths were defined on the PMMA layer by EBL. After the development process, a gold thin film with thickness of 50 nm was deposited by thermal evaporation. Then the liftoff process is applied by rinsing the sample in acetone for a few hours. The periodicity p of array is 1 m, the ring diameter is 500 nm, and the ring thickness t is 50 nm.APPLIED PHYSICS LETTERS 98, 153108 ͑2011͒

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Effects of Coherent Interactions on the Sensing Characteristics of Near-Infrared Gold Nanorings

Cited by 49 publications

References 38 publications

Dielectric-Grating-Coupled Surface Plasmon Resonance From the Back Side of the Metal Film for Ultrasensitive Sensing

Dielectric-Grating-Coupled Surface Plasmon Resonance From the Back Side of the Metal Film for Ultrasensitive Sensing

The local surface plasmon resonance property and refractive index sensitivity of metal elliptical nano-ring arrays

High sensitivity plasmonic index sensor using slablike gold nanoring arrays

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