High density optical data storage using a medium which has photonic crystal structures

使用具有光子晶体结构的介质进行高密度光学数据存储

• 批准号: 15360028
• 负责人: KAWATA Yoshimasa
• 金额: $ 9.73万
• 依托单位: Shizuoka University
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Scientific Research (B)
• 财政年份: 2003
• 资助国家: 日本
• 起止时间: 2003 至 2004
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/en/grant/KAKENHI-PROJECT-15360028/
• 关键词: multi-photon excitation; high density storage; Photonic crystal; optical microscopy; photopolymer; adhesives; photobleaching; optical control; 高密度光メモリ; 2光子吸収; レーザー走査顕微鏡

Three-dimensional optical memory has been developed by many researchers because it can overcome the density limit determined by the diffraction of light wave. In order to increase the density in the axial direction, we have developed a mltilayered recording medium in which photosensitive thin films and nonphotosensitive transparent films were stacked alternately. Since the photosensitive films were thinner than the depth of focus of the recording beam, the spatial frequency distribution of the recorded bit was extended in the axial direction. We have developed the fabrication of photonic crystal structures in the recording medium to achieve higher resolution and contrast.In the case of recording are arranged in the form of hexagonal arrays, the shape of a recorded bit in a structured medium is determined by the products of squared intensity of the focused beam and the structure of the patterned medium. Its frequency distribution is given by convolution of the frequency distribution of the squared spot intensity and that of the patterned medium. As a result, each individual bit in the patterned media contains higher spatial frequency components. We succeeded in recording bits with a 0.5μm interval in particular plane and 2.0μm interval between successive layers. Thus, storage density of 2.0Tbits/cm3 is achieved.

许多研究人员已经开发了三维光学记忆，因为它可以克服由光波的衍射确定的密度极限。为了增加轴向方向的密度，我们开发了一种MLTilay的记录介质，其中光敏性薄膜和非光敏感透明膜交替地堆叠。由于光敏膜比录制光束的焦点深度薄，因此记录位的空间频率分布在轴向方向扩展。我们已经在记录介质中开发了光子晶体结构的结构，以实现更高的分辨率和对比度。在记录的情况下，以六边形阵列的形式排列，在结构化介质中记录的位的形状由焦点强度的产物确定，并确定焦点的平方强度和模式介质的结构。它的频率分布是由平方点强度和图案介质的频率分布的卷积给出的。结果，图案介质中的每个位都包含较高的空间频率成分。我们成功地记录了特定平面间隔0.5μm的钻头和成功层之间的2.0μm间隔。这是2.0tbits/cm3的存储密度。

项目成果

Multilayerd recording media for three-dimensional optical memories

用于三维光存储器的多层记录介质

• 发表时间: 2004
• 期刊: Trasaction of the Magnetics Society of Japan Vol.28
• 作者: M.Nakano;et al.
• 通讯作者: et al.

N.Takahashi, et al.: "Optical Response of Tin Nitride Thin Films Prepared by Halide Chemical Vapor Deposition under Atmospheric Pressure"J.Electronic Materials. 32. 268-270 (2003)

N.Takahashi 等人：“大气压下卤化物化学气相沉积制备的氮化锡薄膜的光学响应”J.Electronic Materials。

High Tolerance of Off-Axis Aberrations with a Birefringent Lens

双折射透镜对离轴像差具有高容差

• 发表时间: 2004
• 期刊: Opt.Eng. 43
• 作者: S.Sanyal;et al.
• 通讯作者: et al.

N.Kobayashi, et al.: "Optical Storage Media with Dye-Doped Minute Spheres on Polymer Films"Opt.Rev.. 10. 262-266 (2003)

N.Kobayashi 等人：“聚合物薄膜上具有染料掺杂微小球体的光学存储介质”Opt.Rev.. 10. 262-266 (2003)

Multilayered Recording Media for Three-Dimensional Optical Memories

三维光学存储器的多层记录介质

• 发表时间: 2004
• 期刊: Transactions of the Magnetics Society of Japan 28
• 作者: M.Nakano;C.Egami;Y.Kawata
• 通讯作者: Y.Kawata