Research PaperNo Access

Influence of thickness on the focusing of terahertz metasurface

Xufeng Wang

School of Computer Science, Harbin University of Science and Technology, Heilongjiang 150080, P. R. China

Search for more papers by this author

Zhenhua Wang

https://orcid.org/0000-0002-5597-4289

College of Science, Harbin University of Science and Technology, Heilongjiang 150080, P. R. China

E-mail Address: wzhua@hrbust.edu.cn

Corresponding author.

Search for more papers by this author

Hongyuan Liu

School of Computer Science, Harbin University of Science and Technology, Heilongjiang 150080, P. R. China

Search for more papers by this author

Jiuxing Jiang

College of Science, Harbin University of Science and Technology, Heilongjiang 150080, P. R. China

Search for more papers by this author

, and

Xunjun He

School of Electrical and Electronic Engineering, Harbin University of Science and Technology, Heilongjiang 150080, P. R. China

E-mail Address: hexunjun@hrbust.edu.cn

Search for more papers by this author

https://doi.org/10.1142/S0217979222500515Cited by:0 (Source: Crossref)

Abstract

Terahertz (THz) focusing metasurface plays a key role in micro-focusing and micro-imaging. Most of the existing focus sets only show the number and deflection of focuses. However, few researches are concerned about the adjustment of focus intensity. Herein we designed a complementary metasurface based on a C-ring and cross-shaped composite slot structures, and the effect of structural thickness on focusing intensity and focal length were studied. We find that the angle of anomalously transmitted beam can be scanned from $17 . 5^{\circ}$ $17 . 5^{\circ}$ to $26 . 5^{\circ}$ $26 . 5^{\circ}$ when the frequency changes from 1.2 THz to 1.8 THz, while the focal length of the focusing metasurface can be linearly changed from 1000 $μ m$ $μ m$ to 1650 $μ m$ $μ m$ . With increase in the thickness of the C-ring area, more interestingly, the focus intensity decreased linearly from 8.0 dB (V/m) to 4.5 dB (V/m). However, the focus intensity showed no obvious change when the thickness of the cross-shaped area was increased from 0.2 $μ m$ $μ m$ to 5 $μ m$ $μ m$ . Therefore, our work would enhance the application of THz in high-resolution imaging, new THz device, and flat lens with adjustable focus intensity.

Keywords:

PACS: 42.79.Bh, 42.60.da, 42.25.Bs, 78.20.−e, 81.15.Cd

You currently do not have access to the full text article.
Recommend the journal to your library today!

References

1. F. Lu, B. Liu and S. Shen , Adv. Opt. Mater. 2, 794 (2015). Crossref, Web of Science, Google Scholar
2. Y. Wei et al., IEEE Photonics J. 10, 1 (2018). Google Scholar
3. Z. Liu and B. F. Bai , Opt. Exp. 25, 8584 (2017). Crossref, Web of Science, Google Scholar
4. T. P. Steinbusch et al., Opt. Express 22, 26559 (2014). Crossref, Web of Science, ADS, Google Scholar
5. R. S. Kshetrimayum , IEEE Potentials 23, 44 (2005). Crossref, Google Scholar
6. D. Headland et al., ACS Photonics 3, 1019 (2016). Crossref, Web of Science, Google Scholar
7. X. J. Ni et al., Science 335, 427 (2012). Crossref, Web of Science, ADS, Google Scholar
8. L. Huang et al., Nano Lett. 12, 5750 (2012). Crossref, Web of Science, ADS, Google Scholar
9. M. Khorasaninejad et al., Science 352, 1190 (2016). Crossref, Web of Science, ADS, Google Scholar
10. D. Y. Lu et al., Opt. Exp. 26, 34956 (2018). Crossref, Web of Science, Google Scholar
11. D. Hakobyan et al., Adv. Opt. Mater. 4, 306 (2016). Crossref, Web of Science, Google Scholar
12. T. Roy et al., APLP 3 (2018). Google Scholar
13. M. Kang et al., Opt. Exp. 20, 15882 (2012). Crossref, Web of Science, ADS, Google Scholar
14. H. Wang, F. Ling and B. Zhang , Opt. Exp. 28, 36316 (2020). Crossref, Web of Science, Google Scholar
15. H. Shi et al., Opt. Exp. 13, 6815 (2005). Crossref, Web of Science, ADS, Google Scholar
16. W. L. Barnes, A. Dereux and T. W. Ebbesen , Nature 424, 824 (2003). Crossref, Web of Science, ADS, Google Scholar
17. R. Fan et al., Adv. Mater. 27, 1201 (2015). Crossref, Web of Science, Google Scholar
18. S. Chen et al., Adv. Opt. Mater. 6, 1800104 (2018). Crossref, Web of Science, Google Scholar
19. Y. Fan et al., ACS Photonics 2, 151 (2015). Crossref, Web of Science, Google Scholar
20. L. Tang et al., Opt. Exp. 26, 6214 (2018). Crossref, Web of Science, Google Scholar
21. T. T. Kim et al., Adv. Opt. Mater. 6, 700507 (2018). Google Scholar
22. J. Li and J. Yao , Opt. Commun. 460, 124986 (2019). Crossref, Web of Science, Google Scholar
23. J. He et al., Plasmonics 11, 1285 (2016). Crossref, Web of Science, Google Scholar
24. T. Jostmeier et al., Appl. Phys. Lett. 105, 34 (2014). Crossref, Web of Science, Google Scholar
25. T. V. Son et al., Appl. Phys. Lett. 105, 2469 (2014). Google Scholar
26. X. H. Yin et al., Light: Sci. Appl. 6, 17016 (2017). Crossref, Web of Science, Google Scholar
27. Y. W. Huang et al., Nano Lett. 16, e5319 (2015). Crossref, Web of Science, ADS, Google Scholar
28. X. Su et al., Opt. Exp. 23, 27152 (2015). Crossref, Web of Science, Google Scholar
29. Y. Yang et al., Nat. Photonics 11, 390 (2017). Crossref, Web of Science, ADS, Google Scholar
30. P. Prasad et al., ACS Photonics 2, 1077 (2015). Crossref, Web of Science, Google Scholar
31. R. Drevinskas et al., Adv. Opt. Mater. 5, 1600575 (2017). Crossref, Web of Science, Google Scholar
32. Y. Zhang et al., Sci. Rep. 7, 14147 (2017). Crossref, Web of Science, ADS, Google Scholar
33. J. Tie et al., Opt. Sci. Appl. 3, 9 (2014). Google Scholar
34. H. Chen et al., Acta Phys. 66, 108 (2017). Google Scholar
35. X. Ni et al., Light: Sci. Appl. 2, e72 (2013). Crossref, Web of Science, Google Scholar
36. D. Chen et al., Carbon 154, 350 (2019). Crossref, Web of Science, Google Scholar
37. L. Cong et al., Light: Sci. Appl. 7, 28 (2018). Crossref, Web of Science, Google Scholar