T-ray là một kỹ thuật sử dụng sóng terahertz, cái gọi là khoa học terahertz, để nghiên cứu một phân đoạn của sóng z điện có thể "nhìn thấu" rất nhiều. Hơn 100 năm trước, terahertz đã được đề cập trong thiên văn học hồng ngoại, nhưng nó hiếm khi được đề cập trong nghiên cứu khoa học và các vấn đề dân sự. Trong lò vi sóng, ánh sáng nhìn thấy và công nghệ hồng ngoại được sử dụng rộng rãi, lý do chính cho sự phát triển tụt hậu của terahertz nằm trong việc thiếu máy dò và nguồn, cho đến 10 năm gần đây, với việc cải tiến các phương pháp nghiên cứu, mọi người trong nghiên cứu này trường có sự phát triển lớn hơn. Hiện nay, nghiên cứu về terahertz đã phát triển thành một lĩnh vực mới, và nghiên cứu về terahertz đã phát triển từ ba đơn vị 20 năm trước đến hơn 200 đơn vị trên toàn thế giới.

Để hiểu rõ hơn Cục Thông tin khoa học và công nghệ quốc gia xin giới thiệu một số bài nghiên cứu đã được xuất bản chính thức và các bài viết được chấp nhận đăng trên những cơ sở dữ liệu học thuật chính thống.

1. Sciencedirect

1. Graphene-based terahertz optoelectronics Optics & Laser Technology Available online 11 September 2022 In press, corrected proof Article 108558 Qiangguo Zhou, Qinxi Qiu, Zhiming Huang

https://www.sciencedirect.com/science/article/pii/S0030399222007083/pdfft?md5=11969f47635705fbba74344fff3a5e1e&pid=1-s2.0-S0030399222007083-main.pdf

2. Study on a terahertz biosensor based on graphene-metamaterial Spectrochimica Acta Part A: Molecular and Biomolecular Spectroscopy 18 June 2022 Volume 280 (Cover date: 5 November 2022) Article 121527 Jianjun Liu, Lanlan Fan, Fan Ding

https://www.sciencedirect.com/science/article/pii/S138614252200676X/pdfft?md5=626ac2018c258ea0221a06b0f2059ac0&pid=1-s2.0-S138614252200676X-main.pdf
3. Design of tunable dual-band terahertz perfect absorber base on graphene

Results in Physics 29 July 2022 Volume 40 (Cover date: September 2022) Article 105860
Fei Liu, Miao He, Bo Ni

https://www.sciencedirect.com/science/article/pii/S2211379722005046/pdfft?md5=e4bdb50f2bc1964416b4fcf72e5a38a4&pid=1-s2.0-S2211379722005046-main.pdf
4. Design of quad-band polarization insensitive ultra-thin compact metamaterial based absorber for terahertz applications

Results in Optics 3 June 2022 Volume 8 (Cover date: August 2022) Article 100248

Vishal Puri, Hari Shankar Singh

https://www.sciencedirect.com/science/article/pii/S2666950122000384/pdfft?md5=1a1fd4b95597fdd09c5fd9f13dc265b8&pid=1-s2.0-S2666950122000384-main.pdf
5. Independently tunable bifunctional terahertz metasurface based on double-layer graphene

Optical Materials 17 August 2022 Volume 132 (Cover date: October 2022) Article 112793

Yuxin Wang, Rongcao Yang, Jinping Tian

https://www.sciencedirect.com/science/article/pii/S0925346722008278/pdfft?md5=016ceb048b7d03c1eb90524fac8a7ee7&pid=1-s2.0-S0925346722008278-main.pdf
6. Tunable multifunctional terahertz coding metasurfaces based on Dirac semimetals

Micro and Nanostructures 23 August 2022 Volume 170 (Cover date: October 2022) Article 207373

Meng Tian, Meng Liu, Huiyun Zhang

https://www.sciencedirect.com/science/article/pii/S2773012322001868/pdfft?md5=4b5efec7c4b366bfc31c220751821492&pid=1-s2.0-S2773012322001868-main.pdf
7. Study of birefringence inside nanocrystalline Zinc Oxide thin films using terahertz spectroscopy

Optical Materials 20 September 2022 Volume 133 (Cover date: November 2022) Article 112962

Rahul Godiwal, Subhash Nimanpure, Mukesh Jewariya

https://www.sciencedirect.com/science/article/pii/S0925346722009995/pdfft?md5=b181d6cb721f734b8dce19464f2845ae&pid=1-s2.0-S0925346722009995-main.pdf
8. Experimental study of Terahertz superfocusing with super-oscillation phenomenon

Optics Communications 11 March 2022 Volume 515 (Cover date: 15 July 2022) Article 128185

Peng Wu, Xu Sun, Hai-feng Lyu

https://www.sciencedirect.com/science/article/pii/S0030401822001626/pdfft?md5=4f92409eb3b7899f691fccaeae649563&pid=1-s2.0-S0030401822001626-main.pdf
9. Novel infrared-terahertz fusion 3D non-invasive imaging of plant fibre-reinforced polymer composites

Composites Science and Technology 14 May 2022 Volume 226 (Cover date: 28 July 2022) Article 109526

Jue Hu, Hai Zhang, Xavier Maldague

https://www.sciencedirect.com/science/article/pii/S0266353822002688/pdfft?md5=92d4cbd8d7d0c94a1ef1ee8b6b878064&pid=1-s2.0-S0266353822002688-main.pdf
10. Excitation of terahertz surface magnetoplasmons by nonlinear mixing of two lasers on a rippled surface of magnetized n-InSb

Optik 30 May 2022 Volume 264 (Cover date: August 2022) Article 169363

Rohit Kumar Srivastav, A. Panwar

https://www.sciencedirect.com/science/article/pii/S0030402622006854/pdfft?md5=f9f895ee34ed87a9162628e03ed85f42&pid=1-s2.0-S0030402622006854-main.pdf
11. Performance analysis of Ta4C3 MXene based optically transparent patch antenna for terahertz communications

Optik 24 March 2022 Volume 260 (Cover date: June 2022) Article 168959

A. Anisha, D. Sriram Kumar

https://www.sciencedirect.com/science/article/pii/S0030402622003382/pdfft?md5=04bd9c3cf7f64d0697bde5e6f075607a&pid=1-s2.0-S0030402622003382-main.pdf

12. Adaptive compressed sensing algorithm for terahertz spectral image reconstruction based on residual learning

Spectrochimica Acta Part A: Molecular and Biomolecular Spectroscopy 6 July 2022 Volume 281 (Cover date: 15 November 2022) Article 121586

Yuying Jiang, Guangming Li, Yuan Zhang

https://www.sciencedirect.com/science/article/pii/S1386142522007351/pdfft?md5=7b55f13625b48cced4d101c95ea4cc0d&pid=1-s2.0-S1386142522007351-main.pdf
13. From Terahertz Imaging to Terahertz Wireless Communications

Engineering Available online 15 September 2022 In press, journal pre-proof

Yi Huang, Yaochun Shen, Jiayou Wang

https://www.sciencedirect.com/science/article/pii/S2095809922006361/pdfft?md5=8f1a613cdd809bb8a4f12d9dd7b538bb&pid=1-s2.0-S2095809922006361-main.pdf
14. Optimization of terahertz fingerprint and identification capabilities by using PSO algorithm

Optik 28 May 2022 Volume 264 (Cover date: August 2022) Article 169354

Feriel Yasmine Latreche, Mohamed Lazoul, Jean-Louis Coutaz

https://www.sciencedirect.com/science/article/pii/S0030402622006787/pdfft?md5=41eb4c6be890240f2651bebeba410252&pid=1-s2.0-S0030402622006787-main.pdf
15. Polarization insensitive achromatic terahertz metalens based on all-dielectric metasurfaces

Optics Communications 16 February 2022 Volume 512 (Cover date: 1 June 2022) Article 128061

Chong Qin, Wenhui Fan, Xiaoqiang Jiang

https://www.sciencedirect.com/science/article/pii/S0030401822000906/pdfft?md5=177aba674288773210f0bfa82b3d3302&pid=1-s2.0-S0030401822000906-main.pdf
16. Evaluation of moisturizing cream using terahertz time-domain spectroscopy

Current Applied Physics 17 April 2022 Volume 39 (Cover date: July 2022) Pages 84-89

Geunchang Choi, Do-Hee Lee, Young-Mi Bahk

https://www.sciencedirect.com/science/article/pii/S1567173922000906/pdfft?md5=3b6b157075fe431653599c21712918b0&pid=1-s2.0-S1567173922000906-main.pdf
17. A reconfigurable beam sweeping patch antenna utilizing parasitic graphene elements for terahertz applications

Photonics and Nanostructures - Fundamentals and Applications 21 June 2022 Volume 51 (Cover date: September 2022) Article 101044

Raheleh Basiri, Ehsan Zareian-Jahromi, Mahsa Aghazade-Tehrani

https://www.sciencedirect.com/science/article/pii/S1569441022000542/pdfft?md5=de00e5142b9f221bcba3f5a7b9002e0a&pid=1-s2.0-S1569441022000542-main.pdf
18. Metal-graphene hybrid terahertz metasurfaces based on bound states in the continuum (BIC) and quasi-BIC for dynamic near-field imaging

Journal of Alloys and Compounds 15 September 2022 Volume 928 (Cover date: 20 December 2022) Article 167232

Fuyu Li, Yuanxun Li, Qiye Wen

https://www.sciencedirect.com/science/article/pii/S0925838822036234/pdfft?md5=e88ee940a5a58b266cbe6341a14644a1&pid=1-s2.0-S0925838822036234-main.pdf
19. A rapid origin identification method for Panax quinquefolius by terahertz spectroscopy combined with random forest

Optik 22 July 2022 Volume 268 (Cover date: October 2022) Article 169718

Lingyu Liu, Yan Gao, Zhongmin Wang

https://www.sciencedirect.com/science/article/pii/S0030402622009974/pdfft?md5=ee5ff815c73ffd3ddac8dbebaf9cfa2d&pid=1-s2.0-S0030402622009974-main.pdf

20. Photogenerated carrier density dependence of ultrafast carrier dynamics in intrinsic 6H-SiC measured by optical-pump terahertz-probe spectroscopy

Optics Communications 22 January 2022 Volume 511 (Cover date: 15 May 2022) Article 127979

Gaofang Li, Xiaobo Nie, Haoyang Cui

https://www.sciencedirect.com/science/article/pii/S0030401822000414/pdfft?md5=195040e943653b33c38dc98c16c0fcb0&pid=1-s2.0-S0030401822000414-main.pdf

21. Non-destructive imaging of marqueteries based on a new infrared-terahertz fusion technique

Infrared Physics & Technology 25 June 2022...

Jue Hu, Hai Zhang, Xavier Maldague

https://www.sciencedirect.com/science/article/pii/S1350449522002584/pdfft?md5=bbd47d238b523487a2a4d9eed07dbf70&pid=1-s2.0-S1350449522002584-main.pdf

22. High sensitivity of room-temperature terahertz photodetector based on Silicon

iScience Available online 26 September 2022 In press, journal pre-proof Article 105217

Qinxi Qiu, Wanli Ma, Zhiming Huang

https://www.sciencedirect.com/science/article/pii/S2589004222014894/pdfft?md5=db4b085c849bf17b957fc5ca369ebc2b&pid=1-s2.0-S2589004222014894-main.pdf

23. Terahertz beam splitter based on mode coupling of subwavelength waveguides

Optics Communications 11 April 2022 Volume 517 (Cover date: 15 August 2022) Article 128294

Zhao Wang, Zi-Jie Dai, Qian-Qian Ge

https://www.sciencedirect.com/science/article/pii/S0030401822002243/pdfft?md5=8c99b97264cafc96cd90ff96ff3bacfb&pid=1-s2.0-S0030401822002243-main.pdf
24. Terahertz spectral vibrational properties and weak interactions analysis of caffeic acid and ferulic acid

Journal of Molecular Structure 15 August 2022 Volume 1270 (Cover date: 15 December 2022) Article 133960

Tao Chen, Yueting Huang, Xianhua Yin

https://www.sciencedirect.com/science/article/pii/S002228602201612X/pdfft?md5=87921e968887d0907d38fa2417264b9c&pid=1-s2.0-S002228602201612X-main.pdf
25. In-plane symmetry breaking induced tunable spin-dependent responses and polarization states for terahertz wave

Optics & Laser Technology 30 July 2022 Volume 156 (Cover date: December 2022) Article 108518

Donghai Han, Xiangdong Fang, Xuefeng Chen

https://www.sciencedirect.com/science/article/pii/S0030399222006703/pdfft?md5=d2158ce6876938d3df69585e07a7b8b5&pid=1-s2.0-S0030399222006703-main.pdf
26. PtTe2-based terahertz photodetector integrated with an interdigital antenna

Infrared Physics & Technology 5 April 2022 Volume 123 (Cover date: June 2022) Article 104168

Kaixuan Zhang, Huaizhong Xing, Lin Wang

https://www.sciencedirect.com/science/article/pii/S1350449522001499/pdfft?md5=1664278d7b8fa19cf145489cfa910a0c&pid=1-s2.0-S1350449522001499-main.pdf
27. Manipulating resonances and absorptions of terahertz ferrite ceramics

Ceramics International 9 June 2022 Volume 48, Issue 19, Part A (Cover date: 1 October 2022) Pages 27615-27621

Xinxi Zeng, Fanzhao Zhang, Ji Zhou

https://www.sciencedirect.com/science/article/pii/S0272884222020508/pdfft?md5=dc6bbbcd8eb7ae0f2391dc9827644bae&pid=1-s2.0-S0272884222020508-main.pdf
28. Study on the enhancement mechanism of terahertz molecular fingerprint sensing

Results in Physics 30 June 2022 Volume 39 (Cover date: August 2022) Article 105766

Dan Meng, Jing Liu, Yu-Shan Chen

https://www.sciencedirect.com/science/article/pii/S2211379722004363/pdfft?md5=92c851bd852a4303ca8d1ffaec957880&pid=1-s2.0-S2211379722004363-main.pdf
29. Beam-distortion enhanced terahertz radiation generation in air

Results in Physics 14 September 2022 Volume 42 (Cover date: November 2022) Article 105985

V. Vaičaitis, V. Tamulienė

https://www.sciencedirect.com/science/article/pii/S221137972200599X/pdfft?md5=c86f20a28a821229194f9374178ba021&pid=1-s2.0-S221137972200599X-main.pdf
30. Two new broadband and tunable terahertz pyramid patch/disk absorbers based on graphene metasurface

Photonics and Nanostructures - Fundamentals and Applications 8 August 2022 Volume 52

(Cover date: December 2022) Article 101048

Bahareh Amini, Zahra Atlasbaf

https://www.sciencedirect.com/science/article/pii/S156944102200058X/pdfft?md5=6167498efd27d5d35ded8a30364a0dfe&pid=1-s2.0-S156944102200058X-main.pdf
31. Polarization-insensitive and absorption-tunable ultra-broadband terahertz metamaterial

absorbers based on multiple resonant rings

Results in Physics 6 July 2022 Volume 39 (Cover date: August 2022) Article 105786

Zian Li, Hui Xia, Wenke Xie

https://www.sciencedirect.com/science/article/pii/S221137972200451X/pdfft?md5=828b7fdebc0e0578609df1c550311674&pid=1-s2.0-S221137972200451X-main.pdf
32. Thermally and magnetically controlled dual-band terahertz metamaterial absorber based on InSb

Optical Materials 24 May 2022 Volume 129 (Cover date: July 2022) Article 112311

Huihui Jing, Yiqing Wei, Binzhen Zhang

https://www.sciencedirect.com/science/article/pii/S0925346722003457/pdfft?md5=cbacacf84aa7e03c89fd91d6a11388da&pid=1-s2.0-S0925346722003457-main.pdf
33. Dielectric property and tunability of multilayer BST-BTO thin film in the terahertz range

Optics & Laser Technology 14 June 2022 Volume 155 (Cover date: November 2022) Article 108366

Xi Zhang, Ming Liu, Liang Wu

https://www.sciencedirect.com/science/article/pii/S0030399222005230/pdfft?md5=289ab3a797294002e365c48bdd655abe&pid=1-s2.0-S0030399222005230-main.pdf
34. Nonlinear modulation of terahertz waves based on a MAPbI3/Gold/Si Hybrid Plasmon-Induced Transparency (PIT) metasurface

Optical Materials 2 June 2022 Volume 129 (Cover date: July 2022) Article 112554

Ming-Zhe Chong, Jin Zhao, Pu-Kun Liu

https://www.sciencedirect.com/science/article/pii/S0925346722005882/pdfft?md5=2f65e16069bfff64c9f1f15e89c02793&pid=1-s2.0-S0925346722005882-main.pdf
35. Towards a fast and generalized microplastic quantification method in soil using terahertz spectroscopy

Science of The Total Environment 10 June 2022 Volume 841 (Cover date: 1 October 2022) Article 156624

Shutao ZhaoYahui Zhang, Yuzhong Zhang

https://www.sciencedirect.com/science/article/pii/S0048969722037214/pdfft?md5=4d8a283e507705237c73f7d30450941c&pid=1-s2.0-S0048969722037214-main.pdf
36. Doubling and tripling the absorption peaks of a multi-band graphene terahertz absorber

Diamond and Related Materials 23 July 2022 Volume 128 (Cover date: October 2022) Article 109260

Rong Cheng, Yuxiu Zhou, Xiaoming Pan

https://www.sciencedirect.com/science/article/pii/S0925963522004423/pdfft?md5=387293182d467a9669fd0b02bd26d3c6&pid=1-s2.0-S0925963522004423-main.pdf
37. The physics of terahertz negative photoconductivity in low-dimensional materials

Materials Today Physics 14 February 2022 Volume 23 (Cover date: March 2022) Article 100631

S. Kar, J. Lake, H. J. Joyce

https://www.sciencedirect.com/science/article/pii/S2542529322000293/pdfft?md5=3e4d18a5e20ed2bc5d6521ec12c4b73c&pid=1-s2.0-S2542529322000293-main.pdf
38. Terahertz spectral identification and low-frequency vibrational analysis of dinitrotoluene isomers

Spectrochimica Acta Part A: Molecular and Biomolecular Spectroscopy 6 August 2022 Volume 283 (Cover date: 15 December 2022) Article 121722

Liu Quancheng, Deng Hu, Shang Liping

https://www.sciencedirect.com/science/article/pii/S138614252200871X/pdfft?md5=d4e60c8f35353464d79688966034bf3e&pid=1-s2.0-S138614252200871X-main.pdf
39. Simultaneous and independent control of phase and polarization in terahertz band for functional integration of multiple devices

Optics & Laser Technology 11 March 2022 Volume 151 (Cover date: July 2022) Article 108064

Jiayu Fan, Lei Zhang, Huawei Liang

https://www.sciencedirect.com/science/article/pii/S0030399222002213/pdfft?md5=2a457667e3de863560c57a7c2aeeb126&pid=1-s2.0-S0030399222002213-main.pdf
40. A tunable dual-band asymmetric transmission metasurface with strong circular dichroism in the terahertz communication band

Optics & Laser Technology 12 February 2022 Volume 150 (Cover date: June 2022) Article 107932

Xiang Tao, Limei Qi, Chuwen Lan

https://www.sciencedirect.com/science/article/pii/S0030399222000895/pdfft?md5=af35b724e60441118543316213cdd163&pid=1-s2.0-S0030399222000895-main.pdf
41. Broadband and tunable terahertz polarization converter based on graphene composite metasurface

Optics Communications 8 June 2022 Volume 521 (Cover date: 15 October 2022) Article 128581

Nianchao Li, Jinshuo Mei, Yuanchao Shi

https://www.sciencedirect.com/science/article/pii/S0030401822003893/pdfft?md5=f7733d61ce32d16938c8d8f7972665ea&pid=1-s2.0-S0030401822003893-main.pdf
42. A multi-band terahertz plasmonic absorber based on fan-like metasurface

Optik 21 July 2022 Volume 267 (Cover date: October 2022) Article 169701

Xinyue Chen, Wei Su, Hong Wu

https://www.sciencedirect.com/science/article/pii/S0030402622009834/pdfft?md5=888c87468cab83942cb60c8c3deccee1&pid=1-s2.0-S0030402622009834-main.pdf
43. Highly enhanced trace amount terahertz fingerprint spectroscopy by multiplexing surface spoof plasmon metasurfaces in a single layer

Optics Communications 19 July 2022 Volume 525 (Cover date: 15 December 2022) Article 128777

Xiang-Jun Li, Ji Yang, Wei-Dong Zhou

https://www.sciencedirect.com/science/article/pii/S0030401822004977/pdfft?md5=4c749b9c71c6a6eed25833cce6f7d930&pid=1-s2.0-S0030401822004977-main.pdf
44. Structured surface wetting of a PTFE flow-cell for terahertz spectroscopy of proteins

Sensors and Actuators B: Chemical 27 October 2021 Volume 352, Part 2 (Cover date: 1 February 2022) Article 131003

Nicholas T. Klokkou, David J. Rowe, Vasilis Apostolopoulos

https://www.sciencedirect.com/science/article/pii/S0925400521015719/pdfft?md5=720e0d06c223563f243204428293f5db&pid=1-s2.0-S0925400521015719-main.pdf
45. Observation of magnetoconductivity with terahertz probes for ferromagnetic Fe films

Current Applied Physics 26 June 2022 Volume 41 (Cover date: September 2022) Pages 81-85

Lin Huang, Yunxiu Zhao, Dong-Hyun Kim

https://www.sciencedirect.com/science/article/pii/S1567173922001614/pdfft?md5=d2784561357aad1ef90743c2edb54a17&pid=1-s2.0-S1567173922001614-main.pdf
46. Active modulation of metamaterial transport properties in the terahertz range

Optical Materials 28 March 2022 Volume 127 (Cover date: May 2022) Article 112283

Han Jing, Zhong Min

https://www.sciencedirect.com/science/article/pii/S0925346722003172/pdfft?md5=b94766a9eaa6b39a19353e89aeb5c17f&pid=1-s2.0-S0925346722003172-main.pdf
47. Resonance-trapped bound states in the continuum via all-silicon terahertz metasurface

Optics Communications 7 April 2022 Volume 516 (Cover date: 1 August 2022) Article 128274

Zhen Yue, Jitao Li, Jianquan Yao

https://www.sciencedirect.com/science/article/pii/S0030401822002140/pdfft?md5=315e31d27ce471a3022ef3ac948fd7c8&pid=1-s2.0-S0030401822002140-main.pdf
48. Design and optimization of multiarray antenna operating in terahertz (THz) band for in-vivo nanonetworks

Optik 13 June 2022 Volume 265 (Cover date: September 2022) Article 169475

Karan Chopra, Shivang Misra, Asmita Rajawat

https://www.sciencedirect.com/science/article/pii/S0030402622007902/pdfft?md5=d2b4d337d9fa578081bdedc4dcb38860&pid=1-s2.0-S0030402622007902-main.pdf
49. Dual-broadband terahertz absorber based on phase transition characteristics of VO2

Results in Physics 28 January 2022 Volume 34 (Cover date: March 2022) Article 105270

Hao Luo, Hai Liu, Yu Jia Qiao

https://www.sciencedirect.com/science/article/pii/S2211379722000699/pdfft?md5=348dda193ae93a0d3a236ab0f14af912&pid=1-s2.0-S2211379722000699-main.pdf

50. Multi-functional high-efficient reflective polarization converter based on all-metal stereostructured anisotropic metamaterials at terahertz frequency

Optics Communications 4 May 2022 Volume 519 (Cover date: 15 September 2022) Article 128403

Hao Luo, Xi Wang, Hang Qian

https://www.sciencedirect.com/science/article/pii/S0030401822002875/pdfft?md5=0e7eb8962054816fb53ff2e495d038f1&pid=1-s2.0-S0030401822002875-main.pdf

51. Quantitative analysis of textile delusterant based on terahertz spectral and data fusion strategies

Infrared Physics & Technology 23 July 2022 Volume 125 (Cover date: September 2022) Article 104293

Xianhua Yin, Huicong Chen, Wei Mo

https://www.sciencedirect.com/science/article/pii/S1350449522002742/pdfft?md5=d5f7aa1266b76fef1b115793320ca94c&pid=1-s2.0-S1350449522002742-main.pdf
52. Terahertz spectroscopy of temperature-induced transformation between glutamic acid, pyroglutamic acid and racemic pyroglutamic acid

Spectrochimica Acta Part A: Molecular and Biomolecular Spectroscopy 15 March 2022 Volume 275 (Cover date: 5 July 2022) Article 121150

Zhenqi Zhu, Yujing Bian, Bin Yang

https://www.sciencedirect.com/science/article/pii/S1386142522002992/pdfft?md5=98317568e5862f29832cff1489773eee&pid=1-s2.0-S1386142522002992-main.pdf

Theo Cục Thông tin khoa học và công nghệ quốc gia, 30/9/2022