Nanoscale chiral valley-photon interface through optical spin-orbit coupling

被引：245

作者：

Gong, Su-Hyun ^{[1
,2
]}

Alpeggiani, Filippo ^{[1
,2
]}

Sciacca, Beniamino ^{[2
]}

Garnett, Erik C. ^{[2
]}

Kuipers, L. ^{[1
,2
]}

机构：

[1] Delft Univ Technol, Dept Quantum Nanosci, Kavli Inst Nanosci, POB 5046, NL-2600 GA Delft, Netherlands

[2] AMOLF, Ctr Nanophoton, Sci Pk 104, NL-1098 XG Amsterdam, Netherlands

来源：

SCIENCE | 2018年 / 359卷 / 6374期

基金：

欧洲研究理事会;

关键词：

NANOPHOTONIC WAVE-GUIDE; POLARIZATION; MOS2; OPTOELECTRONICS; COHERENCE; MOMENTUM; LOCKING;

D O I：

10.1126/science.aan8010

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 two-dimensional transition metal dichalcogenide materials has sparked intense activity in valleytronics, as their valley information can be encoded and detected with the spin angular momentum of light. We demonstrate the valley-dependent directional coupling of light using a plasmonic nanowire-tungsten disulfide (WS2) layers system. We show that the valley pseudospin in WS2 couples to transverse optical spin of the same handedness with a directional coupling efficiency of 90 +/- 1%. Our results provide a platform for controlling, detecting, and processing valley and spin information with precise optical control at the nanoscale.

引用

页码：443 / +

页数：5

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