scholarly journals Terahertz generation from surface of the bulk and monolayer tungsten diselenide

2020 ◽  
Vol 8 (6) ◽  
pp. 121-129
Author(s):  
D. I. Khusyainov ◽  
A. V. Gorbatova ◽  
A. M. Buryakov
Keyword(s):  
Terahertz Radiation ◽  
Nonlinear Optical ◽  
Polarization Plane ◽  
Peak Amplitude ◽  
Optical Rectification ◽  
Thz Radiation ◽  
Layered Crystal ◽  
Optical Effect ◽  
Nonlinear Optical Effect ◽  
Tungsten Diselenide

The study of ultrafast laser interaction with graphene-like materials based on transition metal dichalcogenides attracts most scientific groups. It is connected with potential use of these materials in flexible optoelectronic devices of visible and THz range. In this paper the parameters of generation of terahertz field from the surface of bulk layered crystal and monolayer film of tungsten diselenide are analyzed. Generation of terahertz radiation from the surface of experimental samples was studied by the terahertz time-domain spectroscopy in reflection geometry. Bulk layered crystals of tungsten diselenide were grown by gas transport reactions. Monolayers of tungsten diselenide crystals were grown by chemical vapor deposition on a silicon substrate. The bandwidth of the generated terahertz radiation from the surface of the bulk layered tungsten diselenide crystal was ~ 3.5 THz. For tungsten diselenide monolayer the spectrum bandwidth of the generated THz radiation was ~ 2.5 THz. The peak amplitude of the generated terahertz field for both samples was at a frequency of ~ 1 THz. Research of the influence of the angle of rotation of a polarization plane of optical femtosecond pump on peak-to-peak amplitude of the generated terahertz field from the surface of investigated samples was carried out. Symmetry analysis of the azimuthal dependence of THz radiation made it possible to separate the mechanisms of THz radiation and evaluate their contribution. The analysis results confirm that the only possible contribution to the generation of terahertz radiation in a tungsten diselenide monolayer crystal is the second order nonlinear optical effect – optical rectification. One of the contributions to the generation of tungsten diselenide is a nonlinear-optical effect of the third order – surface optical rectification.

Enhanced terahertz emission from mushroom-shaped InAs nanowire network induced by linear and nonlinear optical effects

2021 ◽  
Author(s):  
Fugang Xi ◽  
He Yang ◽  
Vladislav Khayrudinov ◽  
Yuhang He ◽  
Tuomas Haggren ◽  
...  
Keyword(s):  
Nonlinear Optical ◽  
Optical Rectification ◽  
Optical Effect ◽  
Nonlinear Optical Effect ◽  
Thz Wave ◽  
Emission Component ◽  
Optical Effects ◽  
Nonlinear Optical Effects ◽  
Linear And Nonlinear ◽  
Wave Emission

Abstract The development of powerful terahertz (THz) emitters is the cornerstone for future THz applications, such as communication, medical biology, non-destructive inspection, and scientific research. Here, we report the THz emission properties and mechanisms of mushroom-shaped InAs nanowire (NW) network using linearly polarized laser excitation. By investigating the dependence of THz signal to the incidence pump light properties (e.g., incident angle, direction, fluence, and polarization angle), we conclude that the THz wave emission from the InAs NW network is induced by the combination of linear and nonlinear optical effects. The former is a transient photocurrent accelerated by the photo-Dember field, while the latter is related to the resonant optical rectification effect. Moreover, the p-polarized THz wave emission component is governed by the linear optical effect with a proportion of ~85% and the nonlinear optical effect of ~15%. In comparison, the s-polarized THz wave emission component is mainly decided by the nonlinear optical effect. The THz emission is speculated to be enhanced by the localized surface plasmon resonance absorption of the In droplets on top of the NWs. This work verifies the nonlinear optical mechanism in the THz generation of semiconductor NWs and provides an enlightening reference for the structural design of powerful and flexible THz surface and interface emitters in transmission geometry.

Diffraction-free, self-reconstructing Bessel beam generation using thermal nonlinear optical effect

2017 ◽  
Vol 111 (16) ◽  
pp. 161103 ◽  
Author(s):  
Q. Zhang ◽  
X. M. Cheng ◽  
H. W. Chen ◽  
B. He ◽  
Z. Y. Ren ◽  
...  
Keyword(s):  
Nonlinear Optical ◽  
Bessel Beam ◽  
Optical Effect ◽  
Nonlinear Optical Effect ◽  
Beam Generation

scholarly journals First Measurement of the Non-instantaneous Response Time of a χ(3)Nonlinear Optical Effect

2013 ◽  
Vol 41 ◽  
pp. 12005 ◽  
Author(s):  
Susanta K. Das ◽  
M. Bock ◽  
R. Grunwald ◽  
B. Borchers ◽  
J. Hyyti ◽  
...  
Keyword(s):  
Response Time ◽  
Nonlinear Optical ◽  
Optical Effect ◽  
Nonlinear Optical Effect

La2SrB10O19: A Promising Ultraviolet Nonlinear Optical Crystal with an Enhanced Nonlinear Optical Effect and Shortened Cutoff Edge

2020 ◽  
Vol 20 (8) ◽  
pp. 5626-5632
Author(s):  
Jingcheng Feng ◽  
Youquan Liu ◽  
Yunfei Li ◽  
Huimin Song ◽  
Wang Liu ◽  
...  
Keyword(s):  
Nonlinear Optical ◽  
Optical Effect ◽  
Nonlinear Optical Crystal ◽  
Nonlinear Optical Effect ◽  
Optical Crystal

scholarly journals Enhanced Nonlinear Optical Effect in Hybrid Liquid Crystal Cells Based on Photonic Crystal

2017 ◽  
Vol 12 (1) ◽  
Author(s):  
Svitlana Bugaychuk ◽  
Andrey Iljin ◽  
Oleg Lytvynenko ◽  
Ludmila Tarakhan ◽  
Lulmila Karachevtseva
Keyword(s):  
Liquid Crystal ◽  
Photonic Crystal ◽  
Nonlinear Optical ◽  
Optical Effect ◽  
Nonlinear Optical Effect ◽  
Crystal Cells

Nonlinear optical effect of interlayer charge transfer in a van der Waals heterostructure

2019 ◽  
Vol 115 (26) ◽  
pp. 263103
Author(s):  
Peng Yao ◽  
Dawei He ◽  
Peymon Zereshki ◽  
Yongsheng Wang ◽  
Hui Zhao
Keyword(s):  
Charge Transfer ◽  
Nonlinear Optical ◽  
Van Der Waals ◽  
Optical Effect ◽  
Nonlinear Optical Effect ◽  
Van Der Waals Heterostructure

scholarly journals Multifunctional property exploration: Bi4O5I2 with high visible light photocatalytic performance and a large nonlinear optical effect

RSC Advances ◽  
2019 ◽  
Vol 9 (8) ◽  
pp. 4539-4544 ◽  
Author(s):  
Ruonan Yin ◽  
Yang Li ◽  
Kangdi Zhong ◽  
Hang Yao ◽  
Yamin Zhang ◽  
...  
Keyword(s):  
Photocatalytic Activity ◽  
Dipole Moment ◽  
Harmonic Generation ◽  
Nonlinear Optical ◽  
Photocatalytic Performance ◽  
Second Harmonic ◽  
Optical Effect ◽  
Nonlinear Optical Effect ◽  
Stereochemical Activity ◽  
Visible Light Photocatalytic

Bi4O5I2 exhibits an extremely high second harmonic generation response and enhanced photocatalytic activity. The multifunction of Bi4O5I2 is mainly resulting from the dipole moment of the stereochemical activity of Bi 6s lone pairs.

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