| CONDENSED MATTER: ELECTRONIC STRUCTURE, ELECTRICAL, MAGNETIC, AND OPTICAL PROPERTIES |
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Selective excitation of multipolar surface plasmon in a graphene-coated dielectric particle by Laguerre Gaussian beam |
| Yang Yang(杨阳)1,2, Guanghua Zhang(张光华)1, Xiaoyu Dai(戴小玉)1 |
1 International Collaborative Laboratory of;
2 D Materials for Optoelectronic Science&Technology of Ministry of Education, Institute of Microscale Optoelectronics(IMO), Shenzhen University, Shenzhen 518060, China;
2 Key Laboratory of Optoelectronic Devices and Systems of Ministry of Education and Guangdong Province, College of Physics and Optoelectronics Engineering, Shenzhen University, Shenzhen 518060, China |
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Abstract Localized surface plasmonic resonance has attracted extensive attention since it allows for great enhancement of local field intensity on the nanoparticle surface. In this paper, we make a systematic study on the excitation of localized surface plasmons of a graphene coated dielectric particle. Theoretical results show that both the intensity and frequency of the plasmonic resonant peak can be tuned effectively through modifying the graphene layer. Furthermore, high order localized surface plasmons could be excited and tuned selectively by the Laguerre Gaussian beam, which is induced by the optical angular orbital momentum transfer through the mutual interaction between the particle and the helical wavefront. Moreover, the profiles of the multipolar localized surface plasmons are illustrated in detail. The study provides rich potential applications in the plasmonic devices and the wavefront engineering nano-optics.
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Received: 02 January 2020
Revised: 25 February 2020
Accepted manuscript online:
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PACS:
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73.20.Mf
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(Collective excitations (including excitons, polarons, plasmons and other charge-density excitations))
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41.85.Ew
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(Particle beam profile, beam intensity)
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87.80.Cc
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(Optical trapping)
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Corresponding Authors:
Guanghua Zhang
E-mail: zhanggh123@szu.edu.cn
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Cite this article:
Yang Yang(杨阳), Guanghua Zhang(张光华), Xiaoyu Dai(戴小玉) Selective excitation of multipolar surface plasmon in a graphene-coated dielectric particle by Laguerre Gaussian beam 2020 Chin. Phys. B 29 057302
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