Electric-field control of nonlinear THz spintronic emitters
Energy-efficient spintronic technology holds tremendous potential for the design of next-generation processors to operate at terahertz frequencies. Femtosecond photoexcitation of spintronic materials generates sub-picosecond spin currents and emission of terahertz radiation with broad bandwidth. How...
| Main Authors: | , , , |
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| Other Authors: | |
| Format: | Journal Article |
| Language: | English |
| Published: |
2023
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| Online Access: | https://hdl.handle.net/10356/164936 |
| _version_ | 1826128386928410624 |
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| author | Agarwal, Piyush Huang, Lisen Lim, Sze Ter Singh, Ranjan |
| author2 | School of Physical and Mathematical Sciences |
| author_facet | School of Physical and Mathematical Sciences Agarwal, Piyush Huang, Lisen Lim, Sze Ter Singh, Ranjan |
| author_sort | Agarwal, Piyush |
| collection | NTU |
| description | Energy-efficient spintronic technology holds tremendous potential for the design of next-generation processors to operate at terahertz frequencies. Femtosecond photoexcitation of spintronic materials generates sub-picosecond spin currents and emission of terahertz radiation with broad bandwidth. However, terahertz spintronic emitters lack an active material platform for electric-field control. Here, we demonstrate a nonlinear electric-field control of terahertz spin current-based emitters using a single crystal piezoelectric Pb(Mg1/3Nb2/3)O3-PbTiO3 (PMN-PT) that endows artificial magnetoelectric coupling onto a spintronic terahertz emitter and provides 270% modulation of the terahertz field at remnant magnetization. The nonlinear electric-field control of the spins occurs due to the strain-induced change in magnetic energy of the ferromagnet thin-film. Results also reveal a robust and repeatable switching of the phase of the terahertz spin current. Electric-field control of terahertz spintronic emitters with multiferroics and strain engineering offers opportunities for the on-chip realization of tunable energy-efficient spintronic-photonic integrated platforms. |
| first_indexed | 2024-10-01T07:24:07Z |
| format | Journal Article |
| id | ntu-10356/164936 |
| institution | Nanyang Technological University |
| language | English |
| last_indexed | 2024-10-01T07:24:07Z |
| publishDate | 2023 |
| record_format | dspace |
| spelling | ntu-10356/1649362023-02-28T20:12:37Z Electric-field control of nonlinear THz spintronic emitters Agarwal, Piyush Huang, Lisen Lim, Sze Ter Singh, Ranjan School of Physical and Mathematical Sciences Center for Disruptive Photonic Technologies The Photonics Institute Science::Physics Amplitude Modulation Terahertz Radiation Energy-efficient spintronic technology holds tremendous potential for the design of next-generation processors to operate at terahertz frequencies. Femtosecond photoexcitation of spintronic materials generates sub-picosecond spin currents and emission of terahertz radiation with broad bandwidth. However, terahertz spintronic emitters lack an active material platform for electric-field control. Here, we demonstrate a nonlinear electric-field control of terahertz spin current-based emitters using a single crystal piezoelectric Pb(Mg1/3Nb2/3)O3-PbTiO3 (PMN-PT) that endows artificial magnetoelectric coupling onto a spintronic terahertz emitter and provides 270% modulation of the terahertz field at remnant magnetization. The nonlinear electric-field control of the spins occurs due to the strain-induced change in magnetic energy of the ferromagnet thin-film. Results also reveal a robust and repeatable switching of the phase of the terahertz spin current. Electric-field control of terahertz spintronic emitters with multiferroics and strain engineering offers opportunities for the on-chip realization of tunable energy-efficient spintronic-photonic integrated platforms. National Research Foundation (NRF) Published version R.S. and P.A. would like to acknowledge National Research Foundation, Singapore, for the support through NRF-CRP23-2019-0005. 2023-02-28T09:00:02Z 2023-02-28T09:00:02Z 2022 Journal Article Agarwal, P., Huang, L., Lim, S. T. & Singh, R. (2022). Electric-field control of nonlinear THz spintronic emitters. Nature Communications, 13(1), 4072-. https://dx.doi.org/10.1038/s41467-022-31789-0 2041-1723 https://hdl.handle.net/10356/164936 10.1038/s41467-022-31789-0 35835753 2-s2.0-85134138623 1 13 4072 en NRF-CRP23-2019-0005 Nature Communications 10.21979/N9/ZKGPGD © The Author(s) 2022. 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 | Science::Physics Amplitude Modulation Terahertz Radiation Agarwal, Piyush Huang, Lisen Lim, Sze Ter Singh, Ranjan Electric-field control of nonlinear THz spintronic emitters |
| title | Electric-field control of nonlinear THz spintronic emitters |
| title_full | Electric-field control of nonlinear THz spintronic emitters |
| title_fullStr | Electric-field control of nonlinear THz spintronic emitters |
| title_full_unstemmed | Electric-field control of nonlinear THz spintronic emitters |
| title_short | Electric-field control of nonlinear THz spintronic emitters |
| title_sort | electric field control of nonlinear thz spintronic emitters |
| topic | Science::Physics Amplitude Modulation Terahertz Radiation |
| url | https://hdl.handle.net/10356/164936 |
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