Gan Fuxi, Wang Yang's Data storage at the nanoscale : advances and applications PDF

By Gan Fuxi, Wang Yang

In the large facts period, information garage is without doubt one of the cores within the entire info chain, inclusive of creation, move, sharing, and eventually processing. through the years, the expansion of information quantity has been explosive. at the present time, a number of garage providers desire stories with greater density and means. furthermore, info garage within the monstrous information functions may be eco-friendly, secure, and lengthy lifestyles. The garage density of thoughts used to be mostly more suitable lately end result of the speedy improvement of nanotechnology. The minimal characteristic dimension of optical, magnetic, and electric thoughts is already on the nanometer scale. additionally, the interdisciplinary cooperation of nanotechnology can facilitate the improvement of information garage expertise to accomplish better operation velocity, decrease energy intake, and elevated retention time. This booklet compiles the state-of-the-art examine growth of nanometer-scale facts garage. the most subject matters coated comprise optical reminiscence, random entry reminiscence, magnetic reminiscence, and hybrid reminiscence. The textual content emphasizes more effective tools for info garage improvement and purposes.

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46, 065201. 2. , and Gan, F. (2002). Phase-shifting apodizer for increasing the focal depth, Appl. , 41, 5263–5266. 3. , and Gan, F. (2001). High focal depth with pure-phase apodizer, Appl. , 40, 5658–5662. 4. , and Chong, T. (2006). Subwavelength and super-resolution nondiffraction beam, Appl. Phys. , 89, 171102. 5. , and Chong, T. (2008). Creation of a needle of longitudinal polarized light in vacuum using binary optics, Nat. , 2, 501–505. 6. , and Zhou, C. (2004). Comparison of superresolution effects with annular phase and amplitude filters, Appl.

One of the most remarkable developments in super-resolution microscopy is the STED microscopy [8]. , © 2015 by Taylor & Francis Group, LLC Far-Field Modulation for Super-Resolution Focal Spot structured illumination microscopy (SIMS) [9], stochastic optical reconstruction microscopy (STORM) [10], photo-activated localization microscopy (PALM) [11], the resolution beyond the diffraction limit is achieved by the creation of a super-resolved fluorescence spot, while other techniques rely on the post data processing [9–11].

390 Qinghe Road, Jiading District, Shanghai 201800, China cSchool of Information Science and Technology, Fudan University, No. cn This chapter focuses on the design of binary optics for obtaining super-resolution and long depth of focus (DOF) in an optical data storage system. The extended DOF is critical for near-field recording using a solid immersion lens (SIL), typically with less than 100 nm working distance and extremely fast beam divergence after the SIL exit surface, with the long DOF, the divergence of the beam will be reduced, which makes the beam size less sensitive to the variation of the gap between the optical head and the disk, and therefore, it eases the near-field tracking and serving.

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