Simulation of confined and enhanced optical near-fields for an I-shaped aperture in a pyramidal structure on a thick metallic screen

Tanaka, Kazuo; Tanaka, Masahiro

doi:10.1063/1.1650562

Cited by 19 publications

(7 citation statements)

References 21 publications

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“…Recently, strong near-field enhancement and super resolution were reported by some works about C-shaped aperture [5][6][7], H-shaped aperture (or I-shaped) [8][9][10][11][12], and bowtie aperture [13][14][15][16]. These results were very attractive and have been applied in near-field imaging [17,18], nanolithography [19][20][21], and the vertical cavity surface emitting lasers [22,23].…”

Section: Introductionmentioning

confidence: 87%

Near-Field Enhancement Through a Single Subwavelength Aperture with Gaps Inside

Zhou

Yan

et al. 2010

Plasmonics

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Structured subwavelength apertures have been studied widely to enhance the transmission or obtain super resolution, such as bull's eye hole, H-shaped aperture, and bowtie aperture. In this letter, we present another structured aperture with two gaps inside, which can also lead to nearfield enhancement. And the resonance wavelength can be tuned by the geometric parameters of the gaps. The enhancement of this gap-aperture depends strongly on the polarization of the incident wave. Only the polarization perpendicular to the connecting line of the two gaps can realize the enhancement. We attribute the near-field enhancement of this structured aperture to the resonance excitation of the localized surface plasmon. We combine the tooth-aperture and our gap-aperture together and this special aperture can achieve stronger enhancement and super resolution simultaneously.

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Section: Introductionmentioning

confidence: 87%

Near-Field Enhancement Through a Single Subwavelength Aperture with Gaps Inside

Zhou

Yan

et al. 2010

Plasmonics

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“…After the recent discovery of extraordinary transmission of light through nano-size apertures in a metal film, many researchers have explored different aperture designs [3][4][5][6][7][8] in an attempt to enhance the aperture transmission. Since the electromagnetic field around the aperture in the metal film is coupled with the localized surface plasmon excited through the aperture hole, we can improve the optical resolution by using nano-size optical aperture or structure, which produces a near field that makes the optical spot size much smaller than the diffraction limit [9,10].…”

Section: Introductionmentioning

confidence: 99%

Plasmonic data storage medium with metallic nano-aperture array embedded in dielectric material

Park¹,

Hahn²

2009

Opt. Express

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We propose a plasmonic data storage medium with a high-transmission metal aperture array embedded in a dielectric material. Bowtie apertures, having an outline of 80 nm and a ridge gap of 30 nm, are arranged in a two dimensional array with a bit pitch of 100 nm and a track pitch of 280 nm. Using the finite differential time domain (FDTD) method, we calculate the exposure power needed to record optical data, the contrast for readability of recorded data, and cross talk between the main track and adjacent tracks. Compared to a conventional blu-ray disc, the exposure power needed to record optical data in the proposed plasmonic data storage medium is less than a quarter of the conventional threshold power, and the density of the data storage is about 1.8 times larger.

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“…Two main types of nano sources are currently used in near-field optics. One type of source is aperture source, including aperture probe [1,2] and very small aperture laser (VSAL) [3][4][5]. Although a high resolution can be achieved by such aperture sources, the output field is radiating and diverges very quickly, which requires the distance between sources and samples be rigorously controlled below 50nm.…”

Section: Introductionmentioning

confidence: 99%

A nano-confined source based on surface plasmon Bragg reflectors and nanocavity

Wang¹,

Wang²,

Zhang³

2008

Opt. Express

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A type of nano-confined light source based on SPP Bragg reflectors and a nanocavity has been realized. The structures consisting of a nanocavity surrounded by annular grooves are used to obtain a single, localized and non-radiating central peak, which can be used as a nano source. Characterization of the SPP field in the vicinity of the samples with different structural parameters is accomplished by the scanning near-field optical microscope (SNOM), demonstrating the ability of the structures to enhance the peak intensity and to suppress the sidelobes. During 600 nm distance away from the sample surface, the FWHM of the central peak is below 285 nm (0.45 lambda), and the modifications of the structural parameters result in at least 1.27 times enhancement of the central peak intensity together with the sidelobe suppression of no more than 73% of the central peak intensity. Numerical simulations based on FDTD method show a good agreement with the experimental results, and give some clues to understand the physical mechanisms behind these phenomena. This type of SPP-based nano source is promising to be applied in near-field imaging, data storage, optical manipulation and localized spectrum detection.

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Simulation of confined and enhanced optical near-fields for an I-shaped aperture in a pyramidal structure on a thick metallic screen

Abstract: Excitation of dielectric-loaded surface plasmon polariton observed by using near-field optical microscopy Appl. Phys. Lett. 93, 073306 (2008); 10.1063/1.2973355Characterization of long-range surface plasmon-polariton in stripe waveguides using scanning near-field optical microscopy

Cited by 19 publications

References 21 publications

Near-Field Enhancement Through a Single Subwavelength Aperture with Gaps Inside

Near-Field Enhancement Through a Single Subwavelength Aperture with Gaps Inside

Plasmonic data storage medium with metallic nano-aperture array embedded in dielectric material

A nano-confined source based on surface plasmon Bragg reflectors and nanocavity

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Simulation of confined and enhanced optical near-fields for an I-shaped aperture in a pyramidal structure on a thick metallic screen

Abstract: Excitation of dielectric-loaded surface plasmon polariton observed by using near-field optical microscopy Appl. Phys. Lett. 93, 073306 (2008); 10.1063/1.2973355Characterization of long-range surface plasmon-polariton in stripe waveguides using scanning near-field optical microscopy

Cited by 19 publications

References 21 publications

Near-Field Enhancement Through a Single Subwavelength Aperture with Gaps Inside

Near-Field Enhancement Through a Single Subwavelength Aperture with Gaps Inside

Plasmonic data storage medium with metallic nano-aperture array embedded in dielectric material

A nano-confined source based on surface plasmon Bragg reflectors and nanocavity

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Plasmonic data storage medium with metallic nano-aperture array embedded in dielectric material