Transfer of orbital angular momentum of light to plasmonic excitations in metamaterials

被引：61

作者：

Arikawa, T. ^{[1
]}

Hiraoka, T. ^{[1
]}

Morimoto, S. ^{[1
]}

Blanchard, F. ^{[2
]}

Tani, S. ^{[3
]}

Tanaka, T. ^{[3
]}

Sakai, K. ^{[4
]}

Kitajima, H. ^{[4
]}

Sasaki, K. ^{[4
]}

Tanaka, K. ^{[1
,3
]}

机构：

[1] Kyoto Univ, Dept Phys, Kyoto 6068502, Japan

[2] Ecole Technol Super ETS, Dept Elect Engn, Montreal, PQ H3C 1K3, Canada

[3] Kyoto Univ, Inst Integrated Cell Mat Sci iCeMS, Kyoto 6068501, Japan

[4] Hokkaido Univ, Res Inst Elect Sci, Sapporo, Hokkaido 0010020, Japan

来源：

SCIENCE ADVANCES | 2020年 / 6卷 / 24期

关键词：

RADIATION; TIME;

D O I：

10.1126/sciadv.aay1977

中图分类号：

O [数理科学和化学]; P [天文学、地球科学]; Q [生物科学]; N [自然科学总论];

学科分类号：

07 ; 0710 ; 09 ;

摘要：

The emergence of the vortex beam with orbital angular momentum (OAM) has provided intriguing possibilities to induce optical transitions beyond the framework of the electric dipole interaction. The uniqueness stems from the OAM transfer from light to material, as demonstrated in electronic transitions in atomic systems. In this study, we report on the OAM transfer to electrons in solid-state systems, which has been elusive to date. Using meta-materials (periodically textured metallic disks), we show that multipolar modes of the surface electromagnetic excitations (so-called spoof localized surface plasmons) are selectively induced by the terahertz vortex beam. Our results reveal selection rules governed by the conservation of the total angular momentum, which is confirmed by numerical simulations. The efficient transfer of light's OAM to elementary excitations in solid-state systems at room temperature opens up new possibilities of OAM manipulation.

引用

页数：6

共 35 条

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