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Ultrahigh focal sensitivity in a relaxor ferroelectric crystal-based piezoelectric adaptive lens.
- Source :
- Applied Physics Letters; 8/22/2022, Vol. 121 Issue 8, p1-7, 7p
- Publication Year :
- 2022
-
Abstract
- Traditional piezoelectric adaptive lenses (ALENS) are fabricated by piezoceramics with transparent liquids as the filling media. However, it is challenging to achieve high focal sensitivity and long-time robustness because of the low piezoelectricity of ceramics as well as the evaporation and leakage of the liquids. To overcome the above-mentioned issues, we design a piezoelectric lens based on a radial extension-arching mode by using polydimethylsiloxane films and Pb(In<subscript>1/2</subscript>Nb<subscript>1/2</subscript>)O<subscript>3</subscript>–Pb(Mg<subscript>1/3</subscript>Nb<subscript>2/3</subscript>)O<subscript>3</subscript>–PbTiO<subscript>3</subscript> (PIMNT) relaxor ferroelectric single crystals to replace the transparent liquids and Pb(Zr, Ti)O<subscript>3</subscript> (PZT) ceramics, respectively. Due to the ultrahigh piezoelectric properties (d<subscript>33</subscript> ∼ 1500 pC N<superscript>−1</superscript> and d<subscript>31</subscript> ∼ 730 pC N<superscript>−1</superscript>) of the PIMNT crystals and the optimized radial extension-arching structure, an ultrahigh focal sensitivity (8.5 cm V<superscript>−1</superscript> and a fast response time (∼10<superscript>2</superscript>μs) is achieved, outperforming conventional ALENS based on piezoceramic actuators (∼10<superscript>3</superscript> μs and ∼10<superscript>−1 </superscript>cm V<superscript>−1</superscript>) and dielectric elastomer actuators (∼10<superscript>5</superscript> μs and ∼10<superscript>−2 </superscript>cm V<superscript>−1</superscript>). The largest output displacement of our designed ALENS is up to 53.6 μm at 4.2 kHz under 80 V<subscript>pp</subscript>, and its focus is in the range of 57.44 cm to ∞. Furthermore, its performance remains unchanged after 4 × 10<superscript>7</superscript> vibration cycles, indicating its long-time robustness. This work sheds light on the design of advanced adaptive optical systems, where an ultrahigh focal sensitivity and a fast response are required. [ABSTRACT FROM AUTHOR]
Details
- Language :
- English
- ISSN :
- 00036951
- Volume :
- 121
- Issue :
- 8
- Database :
- Complementary Index
- Journal :
- Applied Physics Letters
- Publication Type :
- Academic Journal
- Accession number :
- 158742313
- Full Text :
- https://doi.org/10.1063/5.0102527