Triangular Aperture as Near-Field Element for High-Density Storage(Plasmonics and Nanophotonics,<Special Section>Microoptomechatronics)

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概要

• 論文の詳細を見る

• Near-field optics is one of super-resolution techniques for future data storage system. We have already proposed a near-field optical flying head with a circular aperture. For realizing higher performance aperture, we developed a triangular one that has been experimentally evaluated with a scanning near-field optical microscope probe. By controlling the polarization of the incident light to the aperture, we could obtain a 100nm resolution with a 190nm-wide aperture. We also demonstrate the readout performance of this novel aperture mounted on a near-field head by introducing polarization control. To scan over a medium surface under a small-spacing condition, we fabricate a contact-type head having contact pads and a polarization maintaining fiber, because this type of aperture can only effectively function under a condition of both extremely small spacing and with applied polarized light. The head is fabricated mainly by photolithography. By controlling process conditions, we obtain contact pads at nm accuracy. A measurement of surface configuration using an interferometer shows that the aperture and the contact pads are almost on the same plane within 10nm. The medium consists of a glass substrate, a titanium layer, a carbon protective layer, and a lubricant layer in this order. Line-and-space (L & S) patterns whose widths are 40-200nm are formed on the titanium layer. The contact head approaches the medium surface, and then the medium is scanned by a piezo stage. The near-field light generated from the triangular aperture is scattered by the L & S pattern and detected by a photomultiplier tube. Signal readout from the 40nm-wide L & S patterns is demonstrated with a 170nm-wide triangular aperture.

• 社団法人電子情報通信学会の論文
• 2007-01-01

著者

• NAKAJIMA Kunio

  Seiko Instruments Inc.

• Hirata Masakazu

  Seiko Instrumentsu Inc.

• Nakajima Kunio

  Seiko Instrumentsu Inc.

• Ohkubo Toshifumi

  Department Of Mechanical Engineering Faculty Of Engineering And Science Toyo University

• Ohkubo Toshifumi

  Department Of Mechanical Engineering Toyo University

• Ohkubo Toshifumi

  Toyo University

• OUMI Manabu

  Seiko Instruments Inc

• SHIBATA Koichi

  Seiko Instruments Inc.

• Oumi M

  Seiko Instrumentsu Inc.

• Nakajima Kazuo

  Local Spatio-temporal Functions Laboratory Frontier Research System

• Ohkubo Toshifumi

  Graduate School Of Frontier Sciences The University Of Tokyo

• Hirata Masakazu

  Seiko Instruments Inc., 563 Takatsuka-Shinden, Matsudo-shi, Chiba 270-2222, Japan

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• Simulation of Simultaneous Tracking/Data Signal Detection Using Novel Aperture-Mounted Surface Recording Head
• High Spatial Resolution and Throughput Potential of an Optical Head with a Triangular Aperture for Near-Field Optical Data Storage
• Triangular Aperture as Near-Field Element for High-Density Storage(Plasmonics and Nanophotonics,Microoptomechatronics)
• Near-Field Optical Flying Head with Protruding Aperture and Its Fabrication
• Signal Readout Using Small Near-Field Optical Head with Horizontal Light Introduction Through Optical Fiber
• Numerical Simulation on Read-Out Characteristics of the Planar Aperture-Mounted Head with a Minute Scatterer
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• Numerical Simulation on Read-Out Characteristics of the Planar Aperture-Mounted Head with a Minute Scatterer
• Signal Readout Using Small Near-Field Optical Head with Horizontal Light Introduction Through Optical Fiber
• Near-Field Optical Flying Head with Protruding Aperture and Its Fabrication

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