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High speed ultrafast laser anisotropic nanostructuring by energy deposition control via near-field enhancement

High speed ultrafast laser anisotropic nanostructuring by energy deposition control via near-field enhancement
High speed ultrafast laser anisotropic nanostructuring by energy deposition control via near-field enhancement
It is challenging to store the exponentially increasing amount of data in the information age. The multiplexed optical data storage with merits of high data density (hundreds of terabytes/disk), low energy consumption, and long lifetime could open a new era in data storage technology. The recent progress in five-dimensional (5D) optical data storage based on anisotropic nanostructures written by femtosecond (fs) laser pulses in transparent materials reveals its potential for real-world applications, but high writing speed and density remain a major challenge. Here, we propose a method for rapid and energy-efficient writing of highly localized anisotropic nanostructures in silica glass by energy modulated megahertz-rate fs pulses. An isotropic nanovoid is initially generated with pulse energy above the microexplosion threshold and then elongated to an anisotropic nanolamella-like structure via the near-field enhancement effect by lower energy pulses, minimizing the unwanted thermal effects from megahertz-rate fs pulses. The anisotropic nanostructures are exploited for 5D data storage with a rate of 106voxels/s, corresponding to a demonstrated fast information recording of ∼225kB/s and a potentially high-density data storage of ∼500TB/disk.
2334-2536
1365-1371
Lei, Yuhao
347ba758-df03-47b6-baed-3a58285173f7
Sakakura, Masaaki
3bb15bbd-d590-4cba-ab5a-862dc7acd054
Wang, Lei
c58bd3ee-ad0c-4829-9365-ef13fad13361
Yu, Yanhao
35084c9e-86ce-4e64-a0f5-6c1e919da6ad
Wang, Huijun
71d8cb32-58db-496b-8e5d-cf378dda5a53
Shayeganrad, Gholamreza
8ea55a9a-4fe2-49df-a0f4-55fa81596dab
Kazansky, Peter
a5d123ec-8ea8-408c-8963-4a6d921fd76c
Lei, Yuhao
347ba758-df03-47b6-baed-3a58285173f7
Sakakura, Masaaki
3bb15bbd-d590-4cba-ab5a-862dc7acd054
Wang, Lei
c58bd3ee-ad0c-4829-9365-ef13fad13361
Yu, Yanhao
35084c9e-86ce-4e64-a0f5-6c1e919da6ad
Wang, Huijun
71d8cb32-58db-496b-8e5d-cf378dda5a53
Shayeganrad, Gholamreza
8ea55a9a-4fe2-49df-a0f4-55fa81596dab
Kazansky, Peter
a5d123ec-8ea8-408c-8963-4a6d921fd76c

Lei, Yuhao, Sakakura, Masaaki, Wang, Lei, Yu, Yanhao, Wang, Huijun, Shayeganrad, Gholamreza and Kazansky, Peter (2021) High speed ultrafast laser anisotropic nanostructuring by energy deposition control via near-field enhancement. Optica, 8 (11), 1365-1371. (doi:10.1364/OPTICA.433765).

Record type: Article

Abstract

It is challenging to store the exponentially increasing amount of data in the information age. The multiplexed optical data storage with merits of high data density (hundreds of terabytes/disk), low energy consumption, and long lifetime could open a new era in data storage technology. The recent progress in five-dimensional (5D) optical data storage based on anisotropic nanostructures written by femtosecond (fs) laser pulses in transparent materials reveals its potential for real-world applications, but high writing speed and density remain a major challenge. Here, we propose a method for rapid and energy-efficient writing of highly localized anisotropic nanostructures in silica glass by energy modulated megahertz-rate fs pulses. An isotropic nanovoid is initially generated with pulse energy above the microexplosion threshold and then elongated to an anisotropic nanolamella-like structure via the near-field enhancement effect by lower energy pulses, minimizing the unwanted thermal effects from megahertz-rate fs pulses. The anisotropic nanostructures are exploited for 5D data storage with a rate of 106voxels/s, corresponding to a demonstrated fast information recording of ∼225kB/s and a potentially high-density data storage of ∼500TB/disk.

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[13]Lei2021Optica - Version of Record
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Accepted/In Press date: 4 September 2021
Published date: 28 October 2021

Identifiers

Local EPrints ID: 452086
URI: http://eprints.soton.ac.uk/id/eprint/452086
ISSN: 2334-2536
PURE UUID: f85e0054-54d0-48d6-bb2f-62d46b404155

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Date deposited: 11 Nov 2021 17:36
Last modified: 27 Apr 2022 11:50

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Contributors

Author: Yuhao Lei
Author: Masaaki Sakakura
Author: Lei Wang
Author: Yanhao Yu
Author: Huijun Wang
Author: Peter Kazansky

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