Homogenized Fourier transform holographic data storage using phase spatial light modulators and methods for recovery of data from the phase image

2006 ◽  
Vol 45 (25) ◽  
pp. 6374 ◽  
Author(s):  
Joby Joseph ◽  
David A. Waldman
Keyword(s):  
Fourier Transform ◽  
Data Storage ◽  
Spatial Light Modulators ◽  
Phase Image ◽  
Holographic Data Storage ◽  
Light Modulators

Spatial light modulators with integrated phase masks for holographic data storage

2007 ◽  
Author(s):  
Michael J. O'Callaghan ◽  
John R. McNeil ◽  
Chris Walker ◽  
Mark A. Handschy
Keyword(s):  
Data Storage ◽  
Spatial Light Modulators ◽  
Holographic Data Storage ◽  
Light Modulators

Phase-image-based content-addressable holographic data storage

2004 ◽  
Vol 232 (1-6) ◽  
pp. 99-106 ◽  
Author(s):  
Renu John ◽  
Joby Joseph ◽  
Kehar Singh
Keyword(s):  
Data Storage ◽  
Phase Image ◽  
Holographic Data Storage

scholarly journals Generation of high-uniformity and high-resolution Bessel beam arrays through all-dielectric metasurfaces

Nanophotonics ◽  
2022 ◽  
Vol 0 (0) ◽  
Author(s):  
Lei Chen ◽  
Saima Kanwal ◽  
Binbin Yu ◽  
Jijun Feng ◽  
Chunxian Tao ◽  
...  
Keyword(s):  
High Resolution ◽  
Data Storage ◽  
Bessel Beam ◽  
Numerical Aperture ◽  
Transverse Dimension ◽  
Sampling Theorem ◽  
Spatial Light Modulators ◽  
Imaging Data ◽  
Light Modulators ◽  
High Uniformity

Abstract Bessel beam arrays are progressively attracting attention in recent years due to their remarkable non-diffracting nature and parallel manipulation capabilities in diverse applications. However, the poor phase discretization of conventional approaches such as spatial light modulators leads to low numerical aperture (NA) beam arrays due to the limitation imposed by the Nyquist sampling theorem and poor uniformity of the beam intensity. The key contribution of this study is to experimentally demonstrate the generation of high-uniformity and high-resolution Bessel beam arrays by utilizing all-dielectric metasurfaces. This is attained by optimizing the design of the supercell of a Dammann grating, particularly decreasing each supercell of the grating to a proper size. We demonstrate a 4 × 4 array of Bessel beams with a subwavelength transverse dimension (570 nm, ∼0.9λ) and a large NA of 0.4 for each beam in the array, while maintaining a relatively high uniformity intensity (52.40%) for the array. Additionally, the Bessel beam arrays are generated in a broadband range through the proposed all-dielectric metasurfaces. Our results are of great significance and particularly useful for applications of metasurface-based Bessel beam arrays in multidisciplinary fields such as laser fabrication, biomedical imaging, data storage, and multi-particle trapping.

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