Super-resolution and frequency-dependent efficiency of near-field optical disks with silver nanoparticles

Ng, Ming Yaw; Liu, Wei Chih

doi:10.1364/opex.13.009422

Cited by 18 publications

(9 citation statements)

References 28 publications

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“…As the results in Figure 3 a,b are compared, in fact the bandwidth of the extinction spectra is inversely proportional to the radius r of the particle for sizes smaller than about 20 nm. For simple hybrid Au–Ag nanoparticles, strong light absorbing and scattering occur at plasmon resonance frequency and high local fields are excited around the nano-particles [ 35 ]. However, in a system consisting of uniformly distributed hybrid Au–Ag PNAs, the resonant condition is modified for particle-particle interaction.…”

Section: Model Construction and Simulationmentioning

confidence: 99%

Generation of Localized Surface Plasmon Resonance Using Hybrid Au–Ag Nanoparticle Arrays as a Sensor of Polychlorinated Biphenyls Detection

Liu

Cai

Chen

et al. 2016

Sensors

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In this study, the hybrid Au–Ag hexagonal lattice of triangular and square lattice of quadrate periodic nanoparticle arrays (PNAs) were designed to investigate their extinction spectra of the localized surface plasmon resonances (LSPRs). First, their simulating extinction spectra were calculated by discrete dipole approximation (DDA) numerical method by changing the media refractive index. Simulation results showed that as the media refractive index was changed from 1.0 to 1.2, the maximum peak intensity of LSPRs spectra had no apparent change and the wavelength to reveal the maximum peak intensity of LSPRs spectra was shifted lower value. Polystyrene (PS) nanospheres with two differently arranged structures were used as the templates to deposit the hybrid Au–Ag hexagonal lattice of triangular and square lattice of quadrate periodic PNAs by evaporation method. The hybrid Au–Ag hexagonal lattice of triangular and square lattice of quadrate PNAs were grown on single crystal silicon (c-Si) substrates, and their measured extinction spectra were compared with the calculated results. Finally, the fabricated hexagonal lattices of triangular PNAs were investigated as a sensor of polychlorinated biphenyl solution (PCB-77) by observing the wavelength to reveal the maximum extinction efficiency (λmax). We show that the adhesion of β-cyclodextrins (SH-β-CD) on the hybrid Au–Ag hexagonal lattice of triangular PNAs could be used to increase the variation of λmax. We also demonstrate that the adhesion of SH-β-CD increases the sensitivity and detection effect of PCB-77 in hexagonal lattice of triangular PNAs.

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Section: Model Construction and Simulationmentioning

confidence: 99%

Generation of Localized Surface Plasmon Resonance Using Hybrid Au–Ag Nanoparticle Arrays as a Sensor of Polychlorinated Biphenyls Detection

Liu

Cai

Chen

et al. 2016

Sensors

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“…A few years ago, a superresolution near-field structure (super-RENS) disk, which can overcome the optical diffraction limit, was successfully developed [1]. Its practicality and rapid progress have attracted much attention in the field of high-density storage [2][3][4][5][6][7][8][9][10][11][12], and its commercialization is being carried out. A short time ago, TDK declared a PtO x super-RENS disk to have a carrier-to-noise-ratio (CNR) suitable for practical use, namely, more than 40 dB for a 60 nm mark train [13].…”

Section: Introductionmentioning

confidence: 99%

Study on readout durability of super-RENS disk

et al. 2008

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Characteristics essential for the readout durability of a superresolution near-field structure (super-RENS) disk are studied experimentally by using a home-built optical measuring setup and atomic force microscope, based on a simplified PtOx super-RENS disk. The experimental results show that for a super-RENS disk with constant structure and materials, readout signals including transmittance and reflectance vary with changes in bubble shape and size, indicating that the readout durability of the disk has a strong dependence on bubble stability, which is closely related to the thickness of the cover layer, the recording power and readout power, and the mechanical properties of the dielectric layer. Based on our experimental results, the main direction for improving readout durability is also proposed.

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“…The 15 nm AgO x thin films are considered to be nonlinear optical layers which control the near-field optical aperture. Recently, several studies have explored this nonlinear near-field optical property; [6][7][8][9] however, the influence of the deformed Super-RENS structure does not seem to be appropriately considered. The active layer (AgO x film) of the AgO x -type Super-RENS structure is deformed after a writing process, as observed in experimental work [10,11].…”

Section: Introductionmentioning

confidence: 99%

The optical properties between an incident wave and the active layer of a bubble-pit AgOx-type super-resolution near-field structure

Chau¹,

Sun²,

Tsai

et al. 2007

Appl. Phys. A

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The deformation and plasmon effects of collective localized surface plasmons between incident light and bubblepit AgO x -type super-RENS structure have been studied using finite-difference time-domain (FDTD) method. We find that the polarization, wavelength of incident light, and particle sizes of Ag nanoparticles are sensitive to the plasma resonance. The Ag nanoparticles inside the bubble-pit AgO x -type super-RENS structure give the additional outer boundaries to the motion of the Ag nanoparticles, and excite more evanescent field which located in the far edge of the bubble from the optical axis of the incident beam. The optical properties between active layer and incident light with polarization direction, different wavelengths, and varied particle sizes of Ag nanoparticles exhibits nonlinear optical behavior in the near field. The far-field signals of different wavelength of incident light confirm the relation between highly localized near-field distributions and enhanced resolution of far-field signals. The subwavelength recording marks smaller than the diffraction limit were distinguishable since the Ag nanoparticles with high localized fields transferred evanescent waves to detectable signals in the far field.

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Super-resolution and frequency-dependent efficiency of near-field optical disks with silver nanoparticles

Cited by 18 publications

References 28 publications

Generation of Localized Surface Plasmon Resonance Using Hybrid Au–Ag Nanoparticle Arrays as a Sensor of Polychlorinated Biphenyls Detection

Generation of Localized Surface Plasmon Resonance Using Hybrid Au–Ag Nanoparticle Arrays as a Sensor of Polychlorinated Biphenyls Detection

Study on readout durability of super-RENS disk

The optical properties between an incident wave and the active layer of a bubble-pit AgOx-type super-resolution near-field structure

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