Giant pattern evolution in third-harmonic generation of strained monolayer WS2 at two-photon excitonic resonance

Liang, Jing1,2,3; Ma, He1,2,3; Wang, Jinhuan4; Zhou, Xu1,2; Yu, Wentao1,2; Ma, Chaojie1,2; Wu, Muhong1,2; Gao, Peng5; Liu, Kaihui1,2,3; Yu, Dapeng6,7

2020-08-12

10.1007/s12274-020-2995-2

Nano Research   影响因子和分区

1998-0124

1998-0000

Strong geometrical confinement and reduced dielectric screening of two-dimensional (2D) materials leads to strong Coulomb interaction and eventually give rise to extraordinary excitonic effects, which dominates the optical and optoelectronic properties. For nonlinear 2D photonic or optoelectronic applications, excitonic effects have been proved effective to tune the light-matter interaction strength. However, the modulation of excitonic effects on the other aspect of nonlinear response, i.e., polarization dependence, has not been fully explored yet. Here we report the first systemic study on the modulation of excitonic effects on the polarization dependence of second and third harmonic generation (SHG and THG) in strained monolayer WS(2)by varying excitation wavelength. We demonstrated that polarization-dependent THG patterns undergo a giant evolution near two-photon excitonic resonance, where the long-axis of the parallel component (originally parallel to the strain direction) has a 90 degrees flip when the excitation wavelength increases. In striking contrast, no apparent variation of polarization-dependent SHG patterns occurs at either two- or three-photon excitonic resonance conditions. Our results open a new avenue to modulate the anisotropic nonlinear optical response of 2D materials through effective control of excitonic resonance states, and thus open opportunity for new designs and applications in nonlinear optoelectronic 2D devices.

two-dimensional materials nonlinear optics excitonic effects

SCI ; EI

英语

其他

Key R&D Program of Guangdong Province[2019B010931001][2020B010189001][2018B010109009][2018B030327001] ; National Natural Science Foundation of China[51991340][51991342] ; National Key R&D Program of China[2016YFA0300903][2016YFA0300804] ; Beijing Natural Science Foundation[JQ19004] ; Beijing Excellent Talents Training Support[2017000026833ZK11] ; Beijing Municipal Science & Technology Commission[Z191100007219005] ; Beijing Graphene Innovation Program[Z181100004818003] ; Bureau of Industry and Information Technology of Shenzhen[201901161512] ; Guangdong Innovative and Entrepreneurial Research Team Program[2016ZT06D348] ; Science, Technology and Innovation Commission of Shenzhen Municipality[KYTDPT20181011104202253]

Chemistry ; Science & Technology - Other Topics ; Materials Science ; Physics

Chemistry, Physical ; Nanoscience & Nanotechnology ; Materials Science, Multidisciplinary ; Physics, Applied

WOS:000559420100001

TSINGHUA UNIV PRESS

20203309058244

Dielectric materials ; Resonance ; Modulation ; Photons ; Nonlinear optics ; Polarization ; Tungsten compounds ; Monolayers

Dielectric Materials:708.1 ; Nonlinear Optics:741.1.1 ; Mechanics:931.1 ; Atomic and Molecular Physics:931.3

Web of Science

1.Peking Univ, State Key Lab Mesoscop Phys, Sch Phys, Beijing 100871, Peoples R China
2.Peking Univ, Frontiers Sci Ctr Nanooptoelect, Sch Phys, Beijing 100871, Peoples R China
3.Peking Univ, Acad Adv Interdisciplinary Studies, Collaborat Innovat Ctr Quantum Matter, Beijing 100871, Peoples R China
4.Beijing Inst Technol, Sch Chem & Chem Engn, Beijing 100081, Peoples R China
5.Peking Univ, Int Ctr Quantum Mat, Sch Phys, Electron Microscopy Lab, Beijing 100871, Peoples R China
6.Southern Univ Sci & Technol, Shenzhen Inst Quantum Sci & Engn, Shenzhen 518055, Peoples R China
7.Southern Univ Sci & Technol, Dept Phys, Shenzhen 518055, Peoples R China

Liang, Jing,Ma, He,Wang, Jinhuan,et al. Giant pattern evolution in third-harmonic generation of strained monolayer WS2 at two-photon excitonic resonance[J]. Nano Research,2020,13:3235-3240.

Liang, Jing.,Ma, He.,Wang, Jinhuan.,Zhou, Xu.,Yu, Wentao.,...&Yu, Dapeng.(2020).Giant pattern evolution in third-harmonic generation of strained monolayer WS2 at two-photon excitonic resonance.Nano Research,13,3235-3240.

Liang, Jing,et al."Giant pattern evolution in third-harmonic generation of strained monolayer WS2 at two-photon excitonic resonance".Nano Research 13(2020):3235-3240.