Ge2Sb2Te5-based nanocavity metasurface for enhancement of third harmonic generation

Li, Yang1,2; Zhang, Xuecai3; Tang, Yutao2,3; Cai, Wenfeng4; Liu, Kuan1; Mao, Ningbin2; Li, Kingfai2; Deng, Junhong2,3; Liu, Yanjun4; Cao, Tun1; Li, Guixin2,3,5

2021-11-01

10.1088/1367-2630/ac3317

NEW JOURNAL OF PHYSICS   影响因子和分区

1367-2630

The third-order nonlinear processes in nanophotonic devices may have great potentials for developing ultra-compact nonlinear optical sources, ultrafast optical switches and modulators, etc. It is known that the performance of the nonlinear nanophotonic devices strongly relies on the optical resonances and the selection of appropriate nonlinear materials. Here, we demonstrate that the third harmonic generations (THG) can be greatly enhanced at subwavelength scale by incorporating alpha-Ge2Sb2Te5 (alpha-GST) into the nanocavity metasurface. Under pumping of a near-infrared femtosecond laser, the THG from the nanocavity metasurface is similar to 50 times stronger than that from the bare GST planar film. In addition, the nanocavity metasurface also provides a powerful platform for characterizing the third-order nonlinear susceptibility of the active medium in the cavity. We expect that the GST-based nanocavity metasurface could open new routes for achieving high efficiency nonlinear nanophotonic devices.

nanocavity metasurface third harmonic generation plasmonics

SCI ; EI

英语

通讯

National Natural Science Foundation of China[91950114,11774145] ; Guangdong Provincial Innovation and Entrepreneurship Project[2017ZT07C071] ; Natural Science Foundation of Shenzhen Innovation Commission[JCYJ20200109140808088] ; Shenzhen DRC project[[2018]1433]

Physics

Physics, Multidisciplinary

WOS:000725854500001

IOP Publishing Ltd

20215011300729

Harmonic analysis ; Infrared devices ; Light modulators ; Nanophotonics ; Nonlinear optics ; Optical switches ; Pumping (laser) ; Quantum optics

Light/Optics:741.1 ; Nonlinear Optics:741.1.1 ; Optical Devices and Systems:741.3 ; Lasers, General:744.1 ; Numerical Methods:921.6 ; Quantum Theory; Quantum Mechanics:931.4

PHYSICS

Web of Science

1.Dalian Univ Technol, Sch Biomed Engn, Dalian 116024, Peoples R China
2.Southern Univ Sci & Technol, Dept Mat Sci & Engn, Shenzhen 518055, Peoples R China
3.Southern Univ Sci & Technol, Shenzhen Inst Quantum Sci & Engn, Shenzhen 518055, Peoples R China
4.Southern Univ Sci & Technol, Dept Elect & Elect Engn, Shenzhen 518055, Peoples R China
5.Southern Univ Sci & Technol, Shenzhen Engn Res Ctr, Novel Elect Informat Mat & Devices, Shenzhen 518055, Peoples R China

Li, Yang,Zhang, Xuecai,Tang, Yutao,et al. Ge2Sb2Te5-based nanocavity metasurface for enhancement of third harmonic generation[J]. NEW JOURNAL OF PHYSICS,2021,23(11).

Li, Yang.,Zhang, Xuecai.,Tang, Yutao.,Cai, Wenfeng.,Liu, Kuan.,...&Li, Guixin.(2021).Ge2Sb2Te5-based nanocavity metasurface for enhancement of third harmonic generation.NEW JOURNAL OF PHYSICS,23(11).

Li, Yang,et al."Ge2Sb2Te5-based nanocavity metasurface for enhancement of third harmonic generation".NEW JOURNAL OF PHYSICS 23.11(2021).