Pseudo-magnetic field-induced slow carrier dynamics in periodically strained graphene
The creation of pseudo-magnetic fields in strained graphene has emerged as a promising route to investigate intriguing physical phenomena that would be unattainable with labora- tory superconducting magnets. The giant pseudo-magnetic fields observed in highly deformed graphene can substantially alte...
| Main Authors: | , , , , , , , , , , , , , , , |
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| Other Authors: | |
| Format: | Journal Article |
| Language: | English |
| Published: |
2022
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| Subjects: | |
| Online Access: | https://hdl.handle.net/10356/156415 |
| _version_ | 1811682990648983552 |
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| author | Kang, Dong-Ho Sun, Hao Luo, Manlin Lu, Kunze Chen, Melvina Kim, Youngmin Jung, Yongduck Gao, Xuejiao Parluhutan, Samuel Jior Ge, Junyu Koh, See Wee Giovanni, David Sum, Tze Chien Wang, Qi Jie Li, Hong Nam, Donguk |
| author2 | School of Electrical and Electronic Engineering |
| author_facet | School of Electrical and Electronic Engineering Kang, Dong-Ho Sun, Hao Luo, Manlin Lu, Kunze Chen, Melvina Kim, Youngmin Jung, Yongduck Gao, Xuejiao Parluhutan, Samuel Jior Ge, Junyu Koh, See Wee Giovanni, David Sum, Tze Chien Wang, Qi Jie Li, Hong Nam, Donguk |
| author_sort | Kang, Dong-Ho |
| collection | NTU |
| description | The creation of pseudo-magnetic fields in strained graphene has emerged as a promising route to investigate intriguing physical phenomena that would be unattainable with labora- tory superconducting magnets. The giant pseudo-magnetic fields observed in highly deformed graphene can substantially alter the optical properties of graphene beyond a level that can be feasible with an external magnetic field, but the experimental signatures of the influence of such pseudo-magnetic fields have yet to be unveiled. Here, using time-resolved infrared pump-probe spectroscopy, we provide unambiguous evidence for slow carrier dynamics enabled by the pseudo-magnetic fields in periodically strained graphene. Strong pseudo-magnetic fields of ~100 T created by non-uniform strain in graphene on nanopillars are found to significantly decelerate the relaxation processes of hot carriers by more than an order of magnitude. Our findings offer alternative opportunities to harness the properties of graphene enabled by pseudo-magnetic fields for optoelectronics and condensed matter physics. |
| first_indexed | 2024-10-01T04:05:37Z |
| format | Journal Article |
| id | ntu-10356/156415 |
| institution | Nanyang Technological University |
| language | English |
| last_indexed | 2024-10-01T04:05:37Z |
| publishDate | 2022 |
| record_format | dspace |
| spelling | ntu-10356/1564152023-02-28T20:06:39Z Pseudo-magnetic field-induced slow carrier dynamics in periodically strained graphene Kang, Dong-Ho Sun, Hao Luo, Manlin Lu, Kunze Chen, Melvina Kim, Youngmin Jung, Yongduck Gao, Xuejiao Parluhutan, Samuel Jior Ge, Junyu Koh, See Wee Giovanni, David Sum, Tze Chien Wang, Qi Jie Li, Hong Nam, Donguk School of Electrical and Electronic Engineering School of Physical and Mathematical Sciences School of Mechanical and Aerospace Engineering Engineering::Electrical and electronic engineering::Optics, optoelectronics, photonics Magnetic Field Optical Property The creation of pseudo-magnetic fields in strained graphene has emerged as a promising route to investigate intriguing physical phenomena that would be unattainable with labora- tory superconducting magnets. The giant pseudo-magnetic fields observed in highly deformed graphene can substantially alter the optical properties of graphene beyond a level that can be feasible with an external magnetic field, but the experimental signatures of the influence of such pseudo-magnetic fields have yet to be unveiled. Here, using time-resolved infrared pump-probe spectroscopy, we provide unambiguous evidence for slow carrier dynamics enabled by the pseudo-magnetic fields in periodically strained graphene. Strong pseudo-magnetic fields of ~100 T created by non-uniform strain in graphene on nanopillars are found to significantly decelerate the relaxation processes of hot carriers by more than an order of magnitude. Our findings offer alternative opportunities to harness the properties of graphene enabled by pseudo-magnetic fields for optoelectronics and condensed matter physics. Agency for Science, Technology and Research (A*STAR) Ministry of Education (MOE) Nanyang Technological University National Research Foundation (NRF) Published version The research of the project was in part supported by Ministry of Education, Singapore, under grant AcRF TIER 1 2019-T1-002-050 (RG 148/19 (S)). The research of the project was also supported by Ministry of Education, Singapore, under grant AcRF TIER 2 (MOE2018-T2-2-011 (S)). This work is also supported by National Research Foundation of Singapore through the Competitive Research Program (NRF-CRP19-2017-01). This work is also supported by National Research Foundation of Singapore through the NRFANR Joint Grant (NRF2018-NRF-ANR009 TIGER). This work is also supported by the iGrant of Singapore A*STAR AME IRG (A2083c0053). T.C.S. and D.G. acknowledge the financial support from Nanyang Technological University under the start-up grants M4080514 and M4081630. Q.J.W. acknowledges the financial support from Singapore Ministry of Education Academic Research Fund Tier 2 under grant no. MOE2018-T2-1- 176. The authors would like to acknowledge and thank the Nanyang NanoFabrication Centre (N2FC). 2022-04-14T01:29:34Z 2022-04-14T01:29:34Z 2021 Journal Article Kang, D., Sun, H., Luo, M., Lu, K., Chen, M., Kim, Y., Jung, Y., Gao, X., Parluhutan, S. J., Ge, J., Koh, S. W., Giovanni, D., Sum, T. C., Wang, Q. J., Li, H. & Nam, D. (2021). Pseudo-magnetic field-induced slow carrier dynamics in periodically strained graphene. Nature Communications, 12, 5087-. https://dx.doi.org/10.1038/s41467-021-25304-0 2041-1723 https://hdl.handle.net/10356/156415 10.1038/s41467-021-25304-0 12 5087 en 2019-T1-002-050 (RG 148/19 (S) MOE2018-T2-2-011 (S) NRF-CRP19-2017-01 NRF2018-NRF-ANR009 TIGER A2083c0053 M4080514 M4081630 MOE2018-T2-1- 176 Nature Communications © 2021 The Author(s). This article is licensed under a Creative Commons Attribution 4.0 International License, which permits use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license, and indicate if changes were made. The images or other third party material in this article are included in the article’s Creative Commons license, unless indicated otherwise in a credit line to the material. If material is not included in the article’s Creative Commons license and your intended use is not permitted by statutory regulation or exceeds the permitted use, you will need to obtain permission directly from the copyright holder. To view a copy of this license, visit http://creativecommons.org/ licenses/by/4.0/. application/pdf |
| spellingShingle | Engineering::Electrical and electronic engineering::Optics, optoelectronics, photonics Magnetic Field Optical Property Kang, Dong-Ho Sun, Hao Luo, Manlin Lu, Kunze Chen, Melvina Kim, Youngmin Jung, Yongduck Gao, Xuejiao Parluhutan, Samuel Jior Ge, Junyu Koh, See Wee Giovanni, David Sum, Tze Chien Wang, Qi Jie Li, Hong Nam, Donguk Pseudo-magnetic field-induced slow carrier dynamics in periodically strained graphene |
| title | Pseudo-magnetic field-induced slow carrier dynamics in periodically strained graphene |
| title_full | Pseudo-magnetic field-induced slow carrier dynamics in periodically strained graphene |
| title_fullStr | Pseudo-magnetic field-induced slow carrier dynamics in periodically strained graphene |
| title_full_unstemmed | Pseudo-magnetic field-induced slow carrier dynamics in periodically strained graphene |
| title_short | Pseudo-magnetic field-induced slow carrier dynamics in periodically strained graphene |
| title_sort | pseudo magnetic field induced slow carrier dynamics in periodically strained graphene |
| topic | Engineering::Electrical and electronic engineering::Optics, optoelectronics, photonics Magnetic Field Optical Property |
| url | https://hdl.handle.net/10356/156415 |
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