关键词: 光子晶体/
光子石墨烯/
赝磁场/
谷霍尔效应
English Abstract
Valley Hall effect induced by pseudomagnetic field in distorted photonic graphene
Deng Fu-Sheng1,2,3,Sun Yong4,
Liu Yan-Hong1,2,3,
Dong Li-Juan1,2,3,
Shi Yun-Long1,2,3
1.Institute of Solid State Physics, Shanxi Datong University, Datong 037009, China;
2.Shanxi Provincial Key Laboratory of Microstructure Electromagnetic Functional Materials, Shanxi Datong University, Datong 037009, China;
3.Key Laboratory of New Microstructure Function Materials in Shanxi Province, Shanxi Datong University, Datong 037009, China;
4.Key Laboratory of Advanced Microstructure Materials, Ministry of Education, Tongji University, Shanghai 200092, China
Fund Project:Project supported by the National Natural Science Foundation of China (Grant Nos. 11604186, 11674247, 11504211), the Natural Science Foundation of Shanxi Province, China (Grant No. 201601D202011), the Science and Technology Project of Shanxi Province, China (Grant No. 2015031002-2), and the Science and Technology Project of Datong, Shanxi Province, China (Grant Nos. 2016021, 2015015, 201308).Received Date:01 March 2017
Accepted Date:16 April 2017
Published Online:05 July 2017
Abstract:Like the spin in spintronics, the valley index in graphene can be viewed as a new carrier of information, which is useful for designing modern electronic devices. Recently, we have applied the concept of valleytronics to photonic graphene, revealed valley-dependent beam splitting effect and realized pseudomagnetic field. The pseudomagnetic field enables a novel manipulation of photons. In this paper, the photonic analogy of valley Hall effect in uniaxially distorted photonic graphene is investigated. It is found that photons in two valleys are subjected to pseudomagnetic fields that are equal in strength but opposite in sign. With the increasing of distortion, the valley Hall effect becomes stronger. In addition, it is found that the photonic valley Hall effect can still be maintained under the influence of loss, although the beam intensity decreases. The photonic analogy of valley Hall effect induced by pseudomagnetic field in uniaxially distorted photonic graphene may be very useful for controlling the flow of light in future valley-polarized devices.
Keywords: photonic crystal/
photonic graphene/
pseudomagnetic field/
valley Hall effect
