Near-field optical data storage using C-apertures

Leen, J. B.; Hansen, Paul; Cheng, Yao-Te; Gibby, Aaron; Hesselink, Lambertus

doi:10.1063/1.3474801

Cited by 19 publications

(13 citation statements)

References 21 publications

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“…Based on the potential to vary four structure parameters independently, this novel lithography method is promising in fabrication of C-shaped aperture-arrays [13], plasmonic materials for spectral engineering [14] and meta-materials [15].…”

Section: Circular Integrated Interference and Colloid Sphere Lithographymentioning

confidence: 99%

Integrated lithography to prepare arrays of rounded nano-objects

Sipos¹,

Szalai²,

Csete³

2012

Alternative Lithographic Technologies IV

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An integrated lithography method is presented to prepare rounded nano-objects with variable shape, in arrays with arbitrary symmetry and wavelength-scaled periodicity. Finite element method was applied to determine the near-field confinement under monolayers of silver and gold colloid spheres illuminated by circularly polarized beams possessing periodic intensity distribution, and to predict the shape of nano-objects, which can be fabricated on thin noble metal layers on glass substrates. It was shown that illumination by perpendicularly incident homogeneous beam results in hexagonal array of uniform nano-rings, while uniform nano-crescents appear due to single obliquely incident beam. Illumination of colloid sphere monolayers by interfering beams causes development of co-existent nano-rings and nanocrescents. It was demonstrated that the periodicity of complex patterns is determined by the wavelength and angle of incidence; the inter-object distance is controlled by the relative orientation of interference patterns with respect to colloid sphere monolayers; the nano-object size is determined by the wavelength, sphere diameter and material; while the nearfield distribution sensitively depends on the direction of illumination by circularly polarized light. We present complex patterns of various rounded nano-objects that can be uniquely fabricated via Circular Integrated Interference and Colloid sphere Lithography (CIICL), and applied as plasmonic and meta-materials.

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Section: Circular Integrated Interference and Colloid Sphere Lithographymentioning

confidence: 99%

Integrated lithography to prepare arrays of rounded nano-objects

Sipos¹,

Szalai²,

Csete³

2012

Alternative Lithographic Technologies IV

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“…Various apertures, such as bulls-eye type geometries, 2 C-shaped ridge waveguide, [3][4][5][6][7] and bowtie apertures, 8 have been extensively studied and found to yield the highest transmission. These structures, however, are quite complex and difficult to be integrated for practical data storage applications such as heat-assisted magnetic recording.…”

Section: Introductionmentioning

confidence: 99%

Efficient excitation of a monopole optical transducer for near-field recording

Peng

2012

Journal of Applied Physics

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An optical near-field transducer composed of a rectangular patch and a protruded peg has been numerically studied for heat-assisted magnetic recording. This transducer strongly interacts with a planar solid immersion focusing field and efficiently couples optical energy into a recording medium in a region determined by the peg cross-section. The transducer is excited through the electric field predominantly normal to its edges. The optimal size of the rectangular patch is found to be a half-wave optical antenna in height and between half-wave and full-wave in width.

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“…We note from the E-field intensity plot in Figure 1(c) that there is a well-confined hot spot at 5 nm beneath the gold film where the light intensity is enhanced by 365 times at the second resonant wavelength. The simulation results for the near-field spot cross sections in the center of the gap region are plotted in Figure 1(d) where it is evident that the full width at half maximum (FWHM) of both x and y-components is around 18 nm (λ/39.4) Since the FBBA antenna is polarization dependent, cross-polarizations [17] are minimized and the hot-spot size is smaller when compared with those obtained by conventional C-aperture [26] and H-shaped nanoantennas. The well-confined hot spot offered by the FBBA antenna may be exploited for high-density near-field optical data storage [25,26].…”

Section: Simulation Results and Discussionmentioning

confidence: 99%

“…The simulation results for the near-field spot cross sections in the center of the gap region are plotted in Figure 1(d) where it is evident that the full width at half maximum (FWHM) of both x and y-components is around 18 nm (λ/39.4) Since the FBBA antenna is polarization dependent, cross-polarizations [17] are minimized and the hot-spot size is smaller when compared with those obtained by conventional C-aperture [26] and H-shaped nanoantennas. The well-confined hot spot offered by the FBBA antenna may be exploited for high-density near-field optical data storage [25,26]. Moreover, we infer from the E-field intensity distribution along the light incidence direction (red curve in Figure 1(d)) that the E-field intensity is enhanced by more than 1,600-fold inside the FBBA antenna's gap, which is much bigger than modified bowtie antenna with same gap size [27].…”

Section: Simulation Results and Discussionmentioning

confidence: 99%

Finite-Boundary Bowtie Aperture Antenna for Trapping Nanoparticles

Ye¹,

Wang²,

Yeo³

et al. 2013

PIER

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Abstract-We have found that a single finite-boundary bowtie aperture (FBBA) antenna with gap separation of 10 nm between its tips is capable of confining the electric field to a 18 nm × 18 nm region (λ/39.4) at 5 nm beneath the gold film and enhancing its nearfield intensity by 1,800-fold inside the gap. The FBBA antenna is thus able to provide enhanced trapping potential by virtue of such extraordinarily high (but exponentially decaying) optical near-fields. We have been able to show that 12 nm gold nanoparticles can, in principle, be trapped by the FBBA antenna with 20 nm gap separation; stable trapping is assured where the trapping potential is found to be several times higher than Brownian-motion potential in water. In addition to trapping nanoparticles, this simple but efficient FBBA antenna may find application in near-field optical data storage.

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Near-field optical data storage using C-apertures

Cited by 19 publications

References 21 publications

Integrated lithography to prepare arrays of rounded nano-objects

Integrated lithography to prepare arrays of rounded nano-objects

Efficient excitation of a monopole optical transducer for near-field recording

Finite-Boundary Bowtie Aperture Antenna for Trapping Nanoparticles

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