Terahertz cascades from nanoparticles
In this article we propose a system capable of terahertz (THz) radiation with quantum yield above unity. The system consists of nanoparticles where the material composition varies along the radial direction of each nanoparticle in such a way that a ladder of equidistant energy levels emerges. By the...
| Main Authors: | , |
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| Other Authors: | |
| Format: | Journal Article |
| Language: | English |
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2018
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| Online Access: | https://hdl.handle.net/10356/80444 http://hdl.handle.net/10220/46553 |
| _version_ | 1826123424756400128 |
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| author | Arnardottir, Kristin Bjorg Liew, Timothy Chi Hin |
| author2 | School of Physical and Mathematical Sciences |
| author_facet | School of Physical and Mathematical Sciences Arnardottir, Kristin Bjorg Liew, Timothy Chi Hin |
| author_sort | Arnardottir, Kristin Bjorg |
| collection | NTU |
| description | In this article we propose a system capable of terahertz (THz) radiation with quantum yield above unity. The system consists of nanoparticles where the material composition varies along the radial direction of each nanoparticle in such a way that a ladder of equidistant energy levels emerges. By then exciting the highest level of this ladder we produce multiple photons of the same frequency in the THz range. We demonstrate how we can calculate a continuous material composition profile that achieves a high quantum yield and then show that a more experimentally friendly design of a multishell nanoparticle can still result in a high quantum yield. |
| first_indexed | 2024-10-01T06:04:07Z |
| format | Journal Article |
| id | ntu-10356/80444 |
| institution | Nanyang Technological University |
| language | English |
| last_indexed | 2024-10-01T06:04:07Z |
| publishDate | 2018 |
| record_format | dspace |
| spelling | ntu-10356/804442023-02-28T19:22:23Z Terahertz cascades from nanoparticles Arnardottir, Kristin Bjorg Liew, Timothy Chi Hin School of Physical and Mathematical Sciences Nanoparticles Terahertz Cascades DRNTU::Science::Physics In this article we propose a system capable of terahertz (THz) radiation with quantum yield above unity. The system consists of nanoparticles where the material composition varies along the radial direction of each nanoparticle in such a way that a ladder of equidistant energy levels emerges. By then exciting the highest level of this ladder we produce multiple photons of the same frequency in the THz range. We demonstrate how we can calculate a continuous material composition profile that achieves a high quantum yield and then show that a more experimentally friendly design of a multishell nanoparticle can still result in a high quantum yield. MOE (Min. of Education, S’pore) Published version 2018-11-05T01:27:26Z 2019-12-06T13:49:35Z 2018-11-05T01:27:26Z 2019-12-06T13:49:35Z 2018 Journal Article Arnardottir, K. B., & Liew, T. C. H. (2018). Terahertz cascades from nanoparticles. Physical Review B, 97(19), 195446-. doi:10.1103/PhysRevB.97.195446 2469-9950 https://hdl.handle.net/10356/80444 http://hdl.handle.net/10220/46553 10.1103/PhysRevB.97.195446 en Physical Review B © 2018 American Physical Society. This paper was published in Physical Review B and is made available as an electronic reprint (preprint) with permission of American Physical Society. The published version is available at: [http://dx.doi.org/10.1103/PhysRevB.97.195446]. One print or electronic copy may be made for personal use only. Systematic or multiple reproduction, distribution to multiple locations via electronic or other means, duplication of any material in this paper for a fee or for commercial purposes, or modification of the content of the paper is prohibited and is subject to penalties under law. 5 p. application/pdf |
| spellingShingle | Nanoparticles Terahertz Cascades DRNTU::Science::Physics Arnardottir, Kristin Bjorg Liew, Timothy Chi Hin Terahertz cascades from nanoparticles |
| title | Terahertz cascades from nanoparticles |
| title_full | Terahertz cascades from nanoparticles |
| title_fullStr | Terahertz cascades from nanoparticles |
| title_full_unstemmed | Terahertz cascades from nanoparticles |
| title_short | Terahertz cascades from nanoparticles |
| title_sort | terahertz cascades from nanoparticles |
| topic | Nanoparticles Terahertz Cascades DRNTU::Science::Physics |
| url | https://hdl.handle.net/10356/80444 http://hdl.handle.net/10220/46553 |
| work_keys_str_mv | AT arnardottirkristinbjorg terahertzcascadesfromnanoparticles AT liewtimothychihin terahertzcascadesfromnanoparticles |