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    • 6. 发明授权
    • Method and apparatus for recording/reproducing magnetization information
    • 用于记录/再现磁化信息的方法和装置
    • US07042669B2
    • 2006-05-09
    • US10788437
    • 2004-03-01
    • Susumu OgawaKenchi Ito
    • Susumu OgawaKenchi Ito
    • G11B5/02
    • G11B9/1472G11B5/743G11B9/14G11B9/1481G11B2005/0002
    • An information storage device having a hard disk has a metal probe that is brought closely to the surface of a multilayer film that includes a magnetic metal layer, a non-magnetic metal layer, and a magnetic metal layer up to a nano-meter order distance from the surface. The distance between the metal probe and the surface of the multilayer film, as well as the voltage to be applied are changed to change the state of the quantum well generated in the multilayer film, thereby changing the magnetizing direction relatively between the two magnetic metal layers. To read magnetization information from the hard disk, a change of an optically induced tunnel current is used. The change of the tunnel current is caused by a change of a plasmon resonance energy according to a relative change of the magnetizing direction between the magnetic metal layers.
    • 具有硬盘的信息存储装置具有金属探针,该金属探针与包括磁性金属层,非磁性金属层和磁性金属层的多层膜的表面紧密接近,直到达到纳米级的距离 从表面。 改变金属探针与多层膜的表面之间的距离以及施加的电压,以改变在多层膜中产生的量子阱的状态,从而相对地改变两个磁性金属层之间的磁化方向 。 为了从硬盘读取磁化信息,使用光学感应隧道电流的改变。 隧道电流的变化是由等离子体共振能量根据磁性金属层之间的磁化方向的相对变化而改变引起的。
    • 8. 发明授权
    • Optical interferometer and signal synthesizer using the interferometer
    • 光干涉仪和信号合成器采用干涉仪
    • US06587278B1
    • 2003-07-01
    • US09524549
    • 2000-03-13
    • Susumu OgawaHrvoje PetekHisashi NaganoAlbert HeberleTatsuya Tomaru
    • Susumu OgawaHrvoje PetekHisashi NaganoAlbert HeberleTatsuya Tomaru
    • G02B2714
    • H04B10/50G01J9/02
    • An optical signal synthesizer having an optical slab waveguide constructed from three layers in which optical pulses are introduced. A first cut-away portion of the optical slab waveguide has a plano-concave shape serving as a plano-convex lens which collimates the introduced optical pulses, a second cut-away portion of the optical slab waveguide serving as a diffraction grating for parallel light beams in which the optical pulses are separated into every frequency, and a third cut-away portion of the optical slab waveguide has a plano-concave shape serving as a plano-convex lens by which the separated optical pulses are focused on a different spatial position associated with each frequency. A spatial light modulator is fabricated at the focusing position in the optical slab waveguide which allows the optical pulses subjected to optical modulation every frequency to pass therethrough according to an applied electrical signal. A fourth cut-away portion of the optical slab waveguide has a plano-concave shape serving as a plano-convex lens which collimates each modulated optical frequency component individually, and a fifth cut-away portion of the optical slab waveguide serving as a diffraction grating for the modulated optical pulses restores the modulated optical pulses to the parallel light beams.
    • 一种光信号合成器,具有由三层构成的光学平板波导,其中引入了光脉冲。 光学平板波导的第一切除部分具有用作平行引入的光脉冲的平凸透镜的平凹形状,用作平行光的衍射光栅的光学平板波导的第二切除部分 其中光脉冲被分离成每个频率的光束,光学平板波导的第三切除部分具有用作平凸透镜的平凹形状,通过该平面凹形形状,分离的光脉冲聚焦在不同的空间位置 与每个频率相关联。 在光学平板波导中的聚焦位置处制造空间光调制器,其允许每个频率经受光调制的光脉冲根据所施加的电信号通过。 光学平板波导的第四切除部分具有平面凹形形状,用作将每个调制的光频率分量单独准直的平凸透镜,以及用作衍射光栅的光学平板波导的第五切除部分 对于调制的光脉冲,将调制的光脉冲恢复到平行光束。