100-layer error-free 5D optical data storage by ultrafast laser nanostructuring in glass
100-layer error-free 5D optical data storage by ultrafast laser nanostructuring in glass
The demand for energy efficient data storage technologies with high capacity and long life span is increasingly growing due to the explosion of digital information in modern society. Here, a 5D optical data storage with high capacity and ultralong lifetime is realized by femtosecond-laser-induced anisotropic nanopore structures (type X modification) in silica glass. The ultrahigh transmission of this birefringent modification, >99% in the visible range, allows recording and retrieving thousands of layers of multibit digital data practically. Type X formation is associated with moderate free carrier density produced close to the energy threshold of avalanche ionization. Higher retardance with increased repetition rate at low pulse energy is attributed to accumulation of defects (nonbridging oxygen hole centers), enabling rapid imprinting of voxels by megahertz-rate pulses. Data recording of 7 bits per voxel, i.e., 25 azimuth angles and 22 retardance levels is experimentally demonstrated with readout error as small as 0.6%. Furthermore, “The Hitchhiker's Guide to the Galaxy” by Douglas Adams is optically recorded with a data writing speed of 8 kB s−1 in 100 layers of voxels and the proven data readout accuracy of 100%.
nanostructuring, optical data storage, silica glass, ultrafast lasers
Wang, Huijun
71d8cb32-58db-496b-8e5d-cf378dda5a53
Lei, Yuhao
347ba758-df03-47b6-baed-3a58285173f7
Wang, Lei
c58bd3ee-ad0c-4829-9365-ef13fad13361
Sakakura, Masaaki
3bb15bbd-d590-4cba-ab5a-862dc7acd054
Yu, Yanhao
35084c9e-86ce-4e64-a0f5-6c1e919da6ad
Shayeganrad, Gholamreza
8ea55a9a-4fe2-49df-a0f4-55fa81596dab
Kazansky, Peter
a5d123ec-8ea8-408c-8963-4a6d921fd76c
23 January 2022
Wang, Huijun
71d8cb32-58db-496b-8e5d-cf378dda5a53
Lei, Yuhao
347ba758-df03-47b6-baed-3a58285173f7
Wang, Lei
c58bd3ee-ad0c-4829-9365-ef13fad13361
Sakakura, Masaaki
3bb15bbd-d590-4cba-ab5a-862dc7acd054
Yu, Yanhao
35084c9e-86ce-4e64-a0f5-6c1e919da6ad
Shayeganrad, Gholamreza
8ea55a9a-4fe2-49df-a0f4-55fa81596dab
Kazansky, Peter
a5d123ec-8ea8-408c-8963-4a6d921fd76c
Wang, Huijun, Lei, Yuhao, Wang, Lei, Sakakura, Masaaki, Yu, Yanhao, Shayeganrad, Gholamreza and Kazansky, Peter
(2022)
100-layer error-free 5D optical data storage by ultrafast laser nanostructuring in glass.
Laser & Photonics Reviews, 16 (4), [2100563].
(doi:10.1002/lpor.202100563).
Abstract
The demand for energy efficient data storage technologies with high capacity and long life span is increasingly growing due to the explosion of digital information in modern society. Here, a 5D optical data storage with high capacity and ultralong lifetime is realized by femtosecond-laser-induced anisotropic nanopore structures (type X modification) in silica glass. The ultrahigh transmission of this birefringent modification, >99% in the visible range, allows recording and retrieving thousands of layers of multibit digital data practically. Type X formation is associated with moderate free carrier density produced close to the energy threshold of avalanche ionization. Higher retardance with increased repetition rate at low pulse energy is attributed to accumulation of defects (nonbridging oxygen hole centers), enabling rapid imprinting of voxels by megahertz-rate pulses. Data recording of 7 bits per voxel, i.e., 25 azimuth angles and 22 retardance levels is experimentally demonstrated with readout error as small as 0.6%. Furthermore, “The Hitchhiker's Guide to the Galaxy” by Douglas Adams is optically recorded with a data writing speed of 8 kB s−1 in 100 layers of voxels and the proven data readout accuracy of 100%.
Text
Laser Photonics Reviews - 2022 - Wang - 100‐Layer Error‐Free 5D Optical Data Storage by Ultrafast Laser Nanostructuring
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e-pub ahead of print date: 23 January 2022
Published date: 23 January 2022
Additional Information:
Funding Information:
The study was supported by the European Research Council (ENIGMA, Grant No. 789116) and Microsoft (Project Silica).
Keywords:
nanostructuring, optical data storage, silica glass, ultrafast lasers
Identifiers
Local EPrints ID: 454852
URI: http://eprints.soton.ac.uk/id/eprint/454852
ISSN: 1863-8880
PURE UUID: 1424c7e8-ab5b-4aeb-959a-0b0f07debdd8
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Date deposited: 25 Feb 2022 18:02
Last modified: 18 Jun 2024 01:57
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Contributors
Author:
Huijun Wang
Author:
Yuhao Lei
Author:
Lei Wang
Author:
Masaaki Sakakura
Author:
Yanhao Yu
Author:
Gholamreza Shayeganrad
Author:
Peter Kazansky
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