Effects of thickness &amp; shape on localized surface plasmon resonance of sexfoil nanoparticles

Yan, Chuanwei; Liu, Xianchao; Chen, Weidong; Xie, Zhengwei; Huang, Yuerong; Ling, Li

doi:10.1088/1674-1056/26/1/017807

Cited by 4 publications

(2 citation statements)

References 46 publications

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“…Surface plasmon polaritons play a crucial role in tailoring the optical force acting on a nearby nanoparticle, which means that the optical trapping force can be tailored by changing the structure of the gold film under different conditions. This in turn enabled us to study the new aspects of specific applications [21][22][23] and investigate the interaction between surface plasmon polaritons and complex structure. Over the past few years, considerable research effort has focused on the optical trapping properties of particle in the vicinity of an optical surface.…”

Section: Introductionmentioning

confidence: 99%

Numerical study of optical trapping properties of nanoparticle on metallic film with periodic structure

Chen

Bai

et al. 2019

Chinese Phys. B

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Based on the three-dimensional dispersive finite difference time domain method and Maxwell stress tensor equation, the optical trapping properties of nanoparticle placed on the gold film with periodic circular holes are investigated numerically. Surface plasmon polaritons are excited on the metal-dielectric interface, with particular emphasis on the crucial role in tailoring the optical force acting on a nearby nanoparticle. Utilizing a first order corrected electromagnetic field components for a fundamental Gaussian beam, the incident beam is added into the calculation model of the proposed method. To obtain the detailed trapping properties of nanoparticle, the selected calculations on the effects of beam waist radius, sizes of nanoparticle and circular holes, distance between incident Gaussian beam and gold film, material of nanoparticle and polarization angles of incident wave are analyzed in detail to demonstrate that the optical-trapping force can be explained as a virtual spring which has a restoring force to perform positive and negative forces as a nanoparticle moves closer to or away from the centers of circular holes. The results of optical trapping properties of nanoparticle in the vicinity of the gold film could provide guidelines for further research on the optical system design and manipulation of arbitrary composite nanoparticles.

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Section: Introductionmentioning

confidence: 99%

Numerical study of optical trapping properties of nanoparticle on metallic film with periodic structure

Chen

Bai

et al. 2019

Chinese Phys. B

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“…Recently, some heavily doped semiconductors, such as Sn-doped In 2 O 3 , WO 3−x , Cu 2−x S, and MoO 3−x , have been demonstrated to show the localized surface plasmon resonance (LSPR) phenomena. [20][21][22][23][24] Among them, the blue WO 3−x , a kind of nonstoichiometric tungsten oxide, exhibits an intense LSPR absorption in both the visible region and the near infrared (NIR) region. [21,25] In this paper, we report a flower-like W 18 O 49 prepared by the hydrothermal method.…”

Section: Introductionmentioning

confidence: 99%

Selective enhancement of green upconversion luminescence of Er–Yb: NaYF ₄ by surface plasmon resonance of W ₁₈ O ₄₉ nanoflowers and applications in temperature sensing

et al. 2018

Chinese Phys. B

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The W 18 O 49 nanoflowers with a diameter of 500 nm are prepared by a facile hydrothermal method. The Er-Yb: NaYF 4 nanoparticles are adsorbed on the petals (the position of the strongest local electric field on W 18 O 49 nanoflowers). With a 976 nm laser diode (LD) as an excitation source, the selectively green upconversion luminescence (UCL) is observed to be enhanced by two orders of magnitude in Er-Yb: NaYF 4 /W 18 O 49 nanoflowers heterostructures. It suggests that the near infrared (NIR)-excited localized surface plasmon resonance (LSPR) of W 18 O 49 is primarily responsible for the enhanced UCL, which could be partly reabsorbed by the W 18 O 49 , thus leading to the selective enhancement of green UCL for the Er-Yb: NaYF 4 . The fluorescence intensity ratio is investigated as a function of temperature based on the intense green UCL, which indicates that Er-Yb: NaYF 4 /W 18 O 49 nanoflower heterostructures have good potential for developing into temperature sensors.

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Optical Properties and Sensing Performance of Au/SiO2 Triangles Arrays on Reflection Au Layer

et al. 2018

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In order to enhance the refractive index sensing performance of simple particle arrays, a structure, consisting of Au/SiO2 triangle arrays layers and reflection Au substrate, with increasing size and lengthening tips of triangles, is studied. The triangle arrays are modeled after an experimentally realizable “imprint” of microsphere lithography. Numerical calculation was carried out to study its optical properties and spectral sensitivity. The calculation results show that a large local enhancement of electric field (61 times) and simultaneously high absorption is due to combination of the resonance absorption of Au triangle disks, plasmonic couplings between the Au triangle disks and the Au film, and the high-density packing of triangle disks. The absorption peaks were not detuned when the gap between neighboring tips of the triangles varied from 10 to 50 nm. When the thickness of SiO2 layer increased from 10 to 50 nm, the absorption peak shifted to longer wavelengths and the amplitude rises quickly signaling the dominance of the gap mode resonance between the two Au layers. As the thickness of the top Au layer varies from 10 to 50 nm, the absorption peak is also red shifted and the peak amplitude increases. The full width at half maximum of the peaks for high absorption (> 90%) is about 5 nm. When fixing the gap, the thicknesses of Au/SiO2 triangle layer, and increasing the surrounding refractive index from 1.33 to 1.36, the absorption peaks shifted quickly, with a refractive index sensitivity and figure of merit as high as 660 nm per refractive index unit and 132, respectively. Such arrays can be easily fabricated by using microsphere array as projection masks and find application in refractive index monitoring of liquid and identification of gas and liquid phases.

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Effects of thickness & shape on localized surface plasmon resonance of sexfoil nanoparticles

Cited by 4 publications

References 46 publications

Numerical study of optical trapping properties of nanoparticle on metallic film with periodic structure

Numerical study of optical trapping properties of nanoparticle on metallic film with periodic structure

Selective enhancement of green upconversion luminescence of Er–Yb: NaYF ₄ by surface plasmon resonance of W ₁₈ O ₄₉ nanoflowers and applications in temperature sensing

Optical Properties and Sensing Performance of Au/SiO2 Triangles Arrays on Reflection Au Layer

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Effects of thickness & shape on localized surface plasmon resonance of sexfoil nanoparticles

Cited by 4 publications

References 46 publications

Numerical study of optical trapping properties of nanoparticle on metallic film with periodic structure

Numerical study of optical trapping properties of nanoparticle on metallic film with periodic structure

Selective enhancement of green upconversion luminescence of Er–Yb: NaYF 4 by surface plasmon resonance of W 18 O 49 nanoflowers and applications in temperature sensing

Optical Properties and Sensing Performance of Au/SiO2 Triangles Arrays on Reflection Au Layer

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Selective enhancement of green upconversion luminescence of Er–Yb: NaYF ₄ by surface plasmon resonance of W ₁₈ O ₄₉ nanoflowers and applications in temperature sensing