| INTERDISCIPLINARY PHYSICS AND RELATED AREAS OF SCIENCE AND TECHNOLOGY |
Prev
Next
|
|
|
High efficiency and broad bandwidth terahertz vortex beam generation based on ultra-thin transmission Pancharatnam-Berry metasurfaces |
| Wenyu Li(李文宇)1,2, Guozhong Zhao(赵国忠)1,†, Tianhua Meng(孟田华)2, Ran Sun(孙然)1, and Jiaoyan Guo(郭姣艳)1 |
1 Department of Physics, Capital Normal University, Beijing Key Laboratory for THz Spectroscopy and Imaging, Key Laboratory of THz Optoelectronics, Ministry of Education, Beijing 100048, China;
2 Institute of Solid State Physics, Shanxi Datong University, Datong 037009, China |
|
|
|
|
Abstract The terahertz (THz) vortex beam generators are designed and theoretically investigated based on single-layer ultra-thin transmission metasurfaces. Noncontinuous phase changes of metasurfaces are obtained by utilizing Pancharatnam-Berry phase elements, which possess different rotation angles and are arranged on two concentric rings centered on the origin. The circularly polarized incident THz beam could be turned into a cross-polarization transmission wave, and the orbital angular momentum (OAM) varies in value by $l\hbar$. The $l$ values change from $\pm 1$ to $\pm 5$, and the maximal cross-polarization conversion efficiency that could be achieved is 23%, which nearly reaches the theoretical limit of a single-layer structure. The frequency range of the designed vortex generator is from 1.2 THz to 1.9 THz, and the generated THz vortex beam could keep a high fidelity in the operating bandwidth. The propagation behavior of the emerged THz vortex beam is analyzed in detail. Our work offers a novel way of designing ultra-thin and single-layer vortex beam generators, which have low process complexity, high conversion efficiency and broad bandwidth.
|
Received: 20 October 2020
Revised: 02 December 2020
Accepted manuscript online: 30 December 2020
|
|
PACS:
|
81.05.Xj
|
(Metamaterials for chiral, bianisotropic and other complex media)
|
| |
74.25.Uv
|
(Vortex phases (includes vortex lattices, vortex liquids, and vortex glasses))
|
| |
03.65.Vf
|
(Phases: geometric; dynamic or topological)
|
| |
07.05.Tp
|
(Computer modeling and simulation)
|
|
| Fund: Project supported by the National Natural Science Foundation of China (Grant No. 62071312), the Important R&D Projects of Shanxi Province, China (Grant No. 201803D121083), and the Shanxi Scholarship Council (Grant No. 2020-135). |
Corresponding Authors:
Guozhong Zhao
E-mail: guozhong-zhao@cnu.edu.cn
|
Cite this article:
Wenyu Li(李文宇), Guozhong Zhao(赵国忠), Tianhua Meng(孟田华), Ran Sun(孙然), and Jiaoyan Guo(郭姣艳) High efficiency and broad bandwidth terahertz vortex beam generation based on ultra-thin transmission Pancharatnam-Berry metasurfaces 2021 Chin. Phys. B 30 058103
|
[1] O'neil A T, Vicar I M, Allen L and Padgett M J 2002 Phys. Rev. Lett. 88 053601
[2] Simpson N B, Dholakia K, Allen L and Padgett M J 1997 Opt. Lett. 22 52
[3] Bouchard F, Leon I D, Schulz S A, Upham J, Karimi E and Boyd R W 2014 Appl. Phys. Lett. 105 101905
[4] Karimi E, Schulz S A, Leon I D, Qassim H, Upham J and Boyd R W 2014 Light: Sci. Appl. 3 167
[5] Guo Y H, Yan L S, Pan W and Luo B 2016 Plasmonics 11 337
[6] Ran Y Z, Liang J G, Cai T and Li H P 2018 Opt. Commun. 427 101
[7] Jin J J, Luo J, Zhang X H, Gao H, Pu M B, Gao P, Zhao Z Y and Luo X G 2016 Sci. Rep. 6 24286
[8] Ding F, Chen Y T and Bozhevolnyi S I 2020 Nanophotonics 9 371
[9] Chen M L, Jiang L J and Sha W 2018 Appl. Sci. 8 362
[10] Chen M L, Jiang L J and Sha W 2017 IEEE T Antenn. Propag. 65 396
[11] Yi A L, Yan L S, Pan Y, Jiang L, Chen Z Y, Pan W and Luo B 2018 Opt. Commun. 408 42
[12] Li X K, Li Y, Zeng X N and Han Y H 2018 J. Opt. 20 125604
[13] Li M M, Yan S H, Yao B L, Liang Y S and Zhang P 2016 Opt. Express 24 20604
[14] Liu K, Cheng Y Q, Yang Z C, Wang H Q, Qin Y L and Li X 2015 IEEE Antennas and Wireless Propagation Letters 14 711
[15] Beijersbergen M W, Coerwinkel R P C, Kristensen M and Woerdman J P 1994 Opt. Commun. 112 321
[16] Li Y M, Kim J W and Escuti M J 2012 Appl. Opt. 51 8236
[17] Cheng L, Hong W and Hao Z C 2014 Sci. Rep. 4 4814
[18] Zhou L, Zhao G Z and Li X N 2019 Acta. Phys. Sin. 68 108701 (in Chinese)
[19] Wang W, Li Y, Guo Z Y, Li R Z, Zhang J R, Zhang A J and Qu S L 2015 J. Opt. 17 045102
[20] Yu N F, Genevet P, Kats M A, Aieta F, Tetienne J P, Capasso F and Gaburro Z 2011 Science 334 333
[21] Wang W, Guo Z Y, Sun Y X, Shen F, Li Y, Liu Y, Wang X S and Qu S L 2015 Opt. Commun. 355 321
[22] He J W, Wang X K, Hu D, Ye J S, Feng S F, Kan Q and Zhang Y 2013 Opt. Express 21 020230
[23] Niv A, Gorodetski Y, Kleiner V and Hasman E 2008 Opt. Lett. 33 2910
[24] Tang S W, Li X K, Pan W K, Zhou J, Jiang T and Ding F 2019 Opt. Express 27 4281
[25] Akram M R, Mehmood M Q, Bai X D, Jin R H, Premaratne M and Zhu W R 2019 Adv. Optical Mater. 7 1801628
[26] Luo W J, Sun S L, Xu H X, He Q and Zhou L 2017 Phys. Rev. Applied 7 044033
[27] Li X N, Zhou L and Zhao G Z 2019 Acta. Phys. Sin. 68 238101 (in Chinese)
[28] Xu Y H, Li Q, Zhang X Q, Wei M G, Xu Q, Wang Q, Zhang H F, Zhang W T, Hu C, Zhang Z W, Zhang C L, Zhang X X, Han J G and Zhang W L 2019 ACS Photon. 6 2933
[29] Chaudhuri K, Shaltout A, Deesha S, Guler U, Dutta A, Shalaev V M and Boltasseva A 2019 ACS Photon. 6 99
[30] Yuan Y Y, Zhang K, Ratni B, Song Q H, Ding X M, Wu Q, Burokur S N and Genevet P 2020 Nat. Commun. 11 4186
[31] Ding X M, Monticone F, Zhang K, Zhang L, Gao D L, Burokur S N, Lustrac A D, Wu Q, Qiu C W and Alu A 2015 Adv. Mater. 27 1195 |
| No Suggested Reading articles found! |
|
|
Viewed |
|
|
|
Full text
|
|
|
|
|
Abstract
|
|
|
|
|
Cited |
|
|
|
|
Altmetric
|
|
blogs
Facebook pages
Wikipedia page
Google+ users
|
Online attention
Altmetric calculates a score based on the online attention an article receives. Each coloured thread in the circle represents a different type of online attention. The number in the centre is the Altmetric score. Social media and mainstream news media are the main sources that calculate the score. Reference managers such as Mendeley are also tracked but do not contribute to the score. Older articles often score higher because they have had more time to get noticed. To account for this, Altmetric has included the context data for other articles of a similar age.
View more on Altmetrics
|
|
|
