Optical torque from enhanced scattering by multipolar plasmonic resonance
We present a theoretical study of the optical angular momentum transfer from a circularly polarized plane wave to thin metal nanoparticles of different rotational symmetries. While absorption has been regarded as the predominant mechanism of torque generation on the nanoscale, we demonstrate numeric...
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| Format: | Article |
| Language: | en_US |
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Walter de Gruyter
2015
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| Online Access: | http://hdl.handle.net/1721.1/97432 https://orcid.org/0000-0003-0501-8843 https://orcid.org/0000-0002-9813-2401 https://orcid.org/0000-0001-6386-5878 https://orcid.org/0000-0001-5713-629X |
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| author | Lee, Yoonkyung E. Jin, Dafei Hung Fung, Kin Fang, Nicholas Xuanlai |
| author2 | Massachusetts Institute of Technology. Department of Mechanical Engineering |
| author_facet | Massachusetts Institute of Technology. Department of Mechanical Engineering Lee, Yoonkyung E. Jin, Dafei Hung Fung, Kin Fang, Nicholas Xuanlai |
| author_sort | Lee, Yoonkyung E. |
| collection | MIT |
| description | We present a theoretical study of the optical angular momentum transfer from a circularly polarized plane wave to thin metal nanoparticles of different rotational symmetries. While absorption has been regarded as the predominant mechanism of torque generation on the nanoscale, we demonstrate numerically how the contribution from scattering can be enhanced by using multipolar plasmon resonance. The multipolar modes in non-circular particles can convert the angular momentum carried by the scattered field and thereby produce scattering-dominant optical torque, while a circularly symmetric particle cannot. Our results show that the optical torque induced by resonant scattering can contribute to 80% of the total optical torque in gold particles. This scattering-dominant torque generation is extremely mode-specific, and deserves to be distinguished from the absorption-dominant mechanism. Our findings might have applications in optical manipulation on the nanoscale as well as new designs in plasmonics and metamaterials. |
| first_indexed | 2024-09-23T16:48:41Z |
| format | Article |
| id | mit-1721.1/97432 |
| institution | Massachusetts Institute of Technology |
| language | en_US |
| last_indexed | 2024-09-23T16:48:41Z |
| publishDate | 2015 |
| publisher | Walter de Gruyter |
| record_format | dspace |
| spelling | mit-1721.1/974322022-09-29T21:37:54Z Optical torque from enhanced scattering by multipolar plasmonic resonance Lee, Yoonkyung E. Jin, Dafei Hung Fung, Kin Fang, Nicholas Xuanlai Massachusetts Institute of Technology. Department of Mechanical Engineering Lee, Yoonkyung E. Hung Fung, Kin Jin, Dafei Fang, Nicholas Xuanlai We present a theoretical study of the optical angular momentum transfer from a circularly polarized plane wave to thin metal nanoparticles of different rotational symmetries. While absorption has been regarded as the predominant mechanism of torque generation on the nanoscale, we demonstrate numerically how the contribution from scattering can be enhanced by using multipolar plasmon resonance. The multipolar modes in non-circular particles can convert the angular momentum carried by the scattered field and thereby produce scattering-dominant optical torque, while a circularly symmetric particle cannot. Our results show that the optical torque induced by resonant scattering can contribute to 80% of the total optical torque in gold particles. This scattering-dominant torque generation is extremely mode-specific, and deserves to be distinguished from the absorption-dominant mechanism. Our findings might have applications in optical manipulation on the nanoscale as well as new designs in plasmonics and metamaterials. National Science Foundation (U.S.) (Award CMMI-1120724) United States. Air Force Office of Scientific Research. Multidisciplinary University Research Initiative (Award FA9550-12-1-0488) 2015-06-15T18:26:53Z 2015-06-15T18:26:53Z 2014-08 2014-02 Article http://purl.org/eprint/type/JournalArticle 2192-8614 2192-8606 http://hdl.handle.net/1721.1/97432 Lee, Yoonkyung E., Kin Hung Fung, Dafei Jin, and Nicholas X. Fang. “Optical Torque from Enhanced Scattering by Multipolar Plasmonic Resonance.” Nanophotonics 3, no. 6 (January 1, 2014). https://orcid.org/0000-0003-0501-8843 https://orcid.org/0000-0002-9813-2401 https://orcid.org/0000-0001-6386-5878 https://orcid.org/0000-0001-5713-629X en_US http://dx.doi.org/10.1515/nanoph-2014-0005 Nanophotonics Creative Commons Attribution-Noncommercial-Share Alike http://creativecommons.org/licenses/by-nc-sa/4.0/ application/pdf Walter de Gruyter arXiv |
| spellingShingle | Lee, Yoonkyung E. Jin, Dafei Hung Fung, Kin Fang, Nicholas Xuanlai Optical torque from enhanced scattering by multipolar plasmonic resonance |
| title | Optical torque from enhanced scattering by multipolar plasmonic resonance |
| title_full | Optical torque from enhanced scattering by multipolar plasmonic resonance |
| title_fullStr | Optical torque from enhanced scattering by multipolar plasmonic resonance |
| title_full_unstemmed | Optical torque from enhanced scattering by multipolar plasmonic resonance |
| title_short | Optical torque from enhanced scattering by multipolar plasmonic resonance |
| title_sort | optical torque from enhanced scattering by multipolar plasmonic resonance |
| url | http://hdl.handle.net/1721.1/97432 https://orcid.org/0000-0003-0501-8843 https://orcid.org/0000-0002-9813-2401 https://orcid.org/0000-0001-6386-5878 https://orcid.org/0000-0001-5713-629X |
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