Random phase mask coded multiplexing for high-density and secure holographic memory

2005 ◽  
Author(s):  
Hongbo Liu ◽  
John Y. Fu ◽  
Yuexin Liu ◽  
Bo Wang ◽  
Chuanyong Huang ◽  
...  
Keyword(s):  
Random Phase ◽  
High Density ◽  
Phase Mask ◽  
Holographic Memory

Multilayer Collinear Holographic Memory with Movable Random Phase Mask

2011 ◽  
Vol 50 (9) ◽  
pp. 09ME10 ◽  
Author(s):  
Atsushi Shibukawa ◽  
Atsushi Okamoto ◽  
Akihisa Tomita ◽  
Masanori Takabayashi ◽  
Kunihiro Sato
Keyword(s):  
Random Phase ◽  
Phase Mask ◽  
Holographic Memory

Evaluation of the Performance in Multilayer Collinear Holographic Memory with Movable Random Phase Mask

2011 ◽  
Author(s):  
Atsushi Shibukawa ◽  
Atsushi Okamoto ◽  
Akihisa Tomita ◽  
Masanori Takabayashi ◽  
Kunihiro Sato ◽  
...  
Keyword(s):  
Random Phase ◽  
Phase Mask ◽  
Holographic Memory

scholarly journals Fabrication of Modified Random Phase Masks with Phase Modulation Elements Exhibiting Gaussian Profiles Using Molecular Migration under Photopolymerization

Photonics ◽  
2019 ◽  
Vol 6 (2) ◽  
pp. 62
Author(s):  
Akira Emoto ◽  
Junya Honda ◽  
Kou Suzuki ◽  
Takumi Kimoto ◽  
Takashi Fukuda
Keyword(s):  
Phase Modulation ◽  
Molecular Diffusion ◽  
Fourier Spectrum ◽  
Random Phase ◽  
Memory Systems ◽  
Phase Mask ◽  
Holographic Memory ◽  
High Density Recording ◽  
Frequency Components ◽  
Narrow Area

Random phase masks are important technical elements for realizing holographic memory systems that enable high density recording. However, the broadly distributed Fourier spectrum often presents a problem because wide recording spots result in reduced total storage capacity for a recording medium. In the present study, we propose modified random phase masks with phase modulation elements exhibiting Gaussian profiles to suppress the spread of the recording spot and keep it in a narrow area, based on the reduction of the high-frequency components in a random phase pattern. We confirm the effectiveness of the proposed random phase mask using simulations of a computer-generated binary hologram. However, issues still remain in terms of the fabrication of random phase masks with Gaussian profiles. Therefore, we evaluate the feasibility of fabricating the proposed random phase mask using molecular diffusion under photopolymerization. The results confirm the feasibility of this approach over a relatively wide area for actual fabrication.

Multilayer Collinear Holographic Memory with Movable Random Phase Mask

2011 ◽  
Vol 50 (9S1) ◽  
pp. 09ME10 ◽  
Author(s):  
Atsushi Shibukawa ◽  
Atsushi Okamoto ◽  
Akihisa Tomita ◽  
Masanori Takabayashi ◽  
Kunihiro Sato
Keyword(s):  
Random Phase ◽  
Phase Mask ◽  
Holographic Memory

scholarly journals DENSITY-DEPENDENT PHONORITON STATES IN HIGHLY EXCITED SEMICONDUCTORS

1995 ◽  
Vol 09 (28) ◽  
pp. 3725-3733
Author(s):  
NGUYEN HONG QUANG ◽  
NGUYEN MINH KHUE
Keyword(s):  
Green's Function ◽  
Random Phase Approximation ◽  
Function Method ◽  
Random Phase ◽  
High Density ◽  
Phase Approximation ◽  
Green’S Function Method ◽  
Exciton Density ◽  
Density Dependent ◽  
Exciton Interaction

The dynamical aspects of the phonoriton state in highly-photoexcited semiconductors is studied theoretically. The effect of the exciton–exciton interaction and nonbosonic character of high-density excitons are taken into account. Using Green's function method and within the Random Phase Approximation it is shown that the phonoriton dispersion and damping are very sensitive to the exciton density, characterizing the excitation degree of semiconductors.

Suppression of inter-pixel cross talk and reduction of recording spot size for high-density holographic memory

2018 ◽  
Vol 26 (1) ◽  
pp. 124-130 ◽  
Author(s):  
Shota Takeuchi ◽  
Teruyoshi Nobukawa ◽  
Daisuke Barada ◽  
Takashi Fukuda ◽  
Akira Emoto
Keyword(s):  
Cross Talk ◽  
Spot Size ◽  
High Density ◽  
Holographic Memory

Image Encryption Based on Vector Decomposition and Chaotic Random Phase Mask

2020 ◽  
Vol 57 (4) ◽  
pp. 041002
Author(s):  
陶珊 Tao Shan ◽  
唐晨 Tang Chen ◽  
雷振坤 Lei Zhenkun
Keyword(s):  
Image Encryption ◽  
Random Phase ◽  
Phase Mask ◽  
Vector Decomposition
Sign in / Sign up

Export Citation Format

Share Document