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Fast photostriction in ferroelectrics
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Liew, Weng Heng, Chen, Yunjie, Alexe, Marin and Yao, Kui (2022) Fast photostriction in ferroelectrics. Small, 18 (7). 2270033. doi:10.1002/smll.202270033 ISSN 1613-6829.
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Official URL: https://doi.org/10.1002/smll.202106275
Abstract
Light-induced nonthermal strain, known as the photostrictive effect, offers a potential way to excite mechanical strain and acoustic wave remotely. The anisotropic photostrictive effect induced by the combination of bulk photovoltaic effect (BPVE) and converse piezoelectric effect in ferroelectric materials is known as too small and slow for the applications requiring a high strain rate, such as ultrasound generation and high-speed signal transmission. Here, a strategy to achieve high rate dynamic photostrictive strain by utilizing local fast responses under modulating continuous light excitation in the resonance condition is reported. A strain rate of 8.06 × 10−3 s−1 is demonstrated under continuous light excitation, which is at least one order of magnitude higher than previous studies on bulk samples as seen in the literature. The significant photostrictive response exists even in depoled ferroelectric material without overall polarization. The theoretical analyses show that fast ferroelectric photostriction can be obtained through the combinational interaction mechanism of local BPVE and local converse piezoelectric effect existing only in the microscopic scale, thus circumventing the slow and low efficient BPVE charging up process across the macroscopic electrical terminals. The achieved fast photostriction and new understandings will open new opportunities to realize future wireless signal transmission and light-acoustic devices.
Item Type: | Journal Article | ||||||||
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Divisions: | Faculty of Science, Engineering and Medicine > Science > Physics | ||||||||
SWORD Depositor: | Library Publications Router | ||||||||
Journal or Publication Title: | Small | ||||||||
Publisher: | Wiley | ||||||||
ISSN: | 1613-6829 | ||||||||
Official Date: | 17 February 2022 | ||||||||
Dates: |
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Volume: | 18 | ||||||||
Number: | 7 | ||||||||
Article Number: | 2270033 | ||||||||
DOI: | 10.1002/smll.202270033 | ||||||||
Status: | Peer Reviewed | ||||||||
Publication Status: | Published | ||||||||
Reuse Statement (publisher, data, author rights): | ** Article version: VoR ** From Crossref journal articles via Jisc Publications Router ** History: epub 17-02-2022. ** Licence for VoR version of this article starting on 17-02-2022: http://onlinelibrary.wiley.com/termsAndConditions#vor | ||||||||
Access rights to Published version: | Restricted or Subscription Access | ||||||||
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