scholarly journals Strong Kerr nonlinearity in BiOBr 2D materials for applications to nonlinear integrated photonic devices

2020 ◽  
Author(s):  
David Moss
Keyword(s):  
2D Materials ◽  
Kerr Nonlinearity ◽  
Layered Materials ◽  
Photonic Devices ◽  
Optical Nonlinearities ◽  
Third Order ◽  
The Third ◽  
2D Layered Materials ◽  
Important Member ◽  
Bismuth Oxyhalides

As a new group of advanced 2D layered materials, bismuth oxyhalides, i.e., BiOX (X = Cl, Br, I), have recently become of great interest. In this work, we characterize the third-order optical nonlinearities of BiOBr, an important member of the BiOX family.

scholarly journals Large 3rd Order Optical Kerr Nonlinearity in 2D PdSe2 Dichalcogenide Films for Integrated Nonlinear Photonic Chips

2021 ◽  
Author(s):  
David Moss
Keyword(s):  
High Performance ◽  
Nonlinear Optical ◽  
Laser Intensity ◽  
Nonlinear Refraction ◽  
Kerr Nonlinearity ◽  
Photonic Devices ◽  
Closed Aperture ◽  
Third Order ◽  
Limiting Behaviour ◽  
Incident Laser Intensity

<p>As a novel layered noble metal dichalcogenide material, palladium diselenide (PdSe<sub>2</sub>) has attracted wide interest due to its excellent optical and electronic properties. In this work, a strong third-order nonlinear optical response of 2D PdSe<sub>2</sub> films is reported. We conduct both open-aperture (OA) and closed-aperture (CA) Z-scan measurements with a femtosecond pulsed laser at 800 nm to investigate the nonlinear absorption and nonlinear refraction, respectively. In the OA experiment, we observe optical limiting behaviour originating from large two photo absorption (TPA) in the PdSe<sub>2</sub> film of <i>β =</i> 3.26 ×10<sup>-8</sup> m/W. In the CA experiment, we measure a peak-valley response corresponding to a large and negative Kerr nonlinearity of <i>n</i><sub>2</sub> = -1.33×10<sup>-15</sup> m<sup>2</sup>/W – two orders of magnitude larger than bulk silicon. In addition, the variation of <i>n</i><sub>2</sub> as a function of laser intensity is also characterized, with <i>n</i><sub>2</sub> decreasing in magnitude when increasing incident laser intensity, becoming saturated at <i>n</i><sub>2</sub> = -9.96×10<sup>-16</sup> m<sup>2</sup>/W at high intensities. Our results show that the extraordinary third-order nonlinear optical properties of PdSe<sub>2</sub> have strong potential for high-performance nonlinear photonic devices.</p>

First-principles investigation of copper diffusion barrier performance in defective 2D layered materials

2022 ◽  
Author(s):  
Manareldeen Ahmed ◽  
Yan Li ◽  
Wenchao Chen ◽  
Erping Li
Keyword(s):  
Barrier Layer ◽  
Diffusion Barrier ◽  
First Principles ◽  
Energy Barrier ◽  
2D Materials ◽  
Diffusion Path ◽  
Layered Materials ◽  
Vacancy Defects ◽  
2D Layered Materials ◽  
Barrier Performance

Abstract This paper investigates the diffusion barrier performance of 2D layered materials with pre-existing vacancy defects using first-principles density functional theory. Vacancy defects in 2D materials may give rise to a large amount of Cu accumulation, and consequently, the defect becomes a diffusion path for Cu. Five 2D layered structures are investigated as diffusion barriers for Cu, i.e., graphene with C vacancy, hBN with B/N vacancy, and MoS2 with Mo/2S vacancy. The calculated energy barriers using climbing image - nudged elastic band show that MoS2-V2S has the highest diffusion energy barrier among other 2D layers, followed by hBN-VN and graphene. The obtained energy barrier of Cu on defected layer is found to be proportional to the length of the diffusion path. Moreover, the diffusion of Cu through vacancy defects is found to modulate the electronic structures and magnetic properties of the 2D layer. The charge density difference shows that there exists a considerable charge transfer between Cu and barrier layer as quantified by Bader charge. Given the current need for an ultra-thin diffusion barrier layer, the obtained results contribute to the field of application of 2D materials as Cu diffusion barrier in the presence of mono-vacancy defects.

The third-order optical nonlinearities of thiophene-bearing phthalocyanines studied by Z-scan technique

2011 ◽  
Vol 218 (1) ◽  
pp. 64-68 ◽  
Author(s):  
Zihui Chen ◽  
Xinyu Zhou ◽  
Zhongyu Li ◽  
Lihong Niu ◽  
Jiaxiang Yi ◽  
...  
Keyword(s):  
Optical Nonlinearities ◽  
Third Order ◽  
The Third

scholarly journals Mechanochemical preparation of piezoelectric nanomaterials: BN, MoS2 and WS2 2D materials and their glycine-cocrystals

2020 ◽  
Vol 5 (2) ◽  
pp. 331-335 ◽  
Author(s):  
Viviana Jehová González ◽  
Antonio M. Rodríguez ◽  
Ismael Payo ◽  
Ester Vázquez
Keyword(s):  
Transition Metal ◽  
Boron Nitride ◽  
2D Materials ◽  
Transition Metal Dichalcogenides ◽  
Layered Materials ◽  
Molybdenum Disulphide ◽  
2D Layered Materials ◽  
Metal Dichalcogenides

Different 2D-layered materials of transition metal dichalcogenides (TMDCs) such as boron nitride (BN) or molybdenum disulphide (MoS2) have been theorised to have piezoelectric behaviour.

Single beam Z-scan measurement of the third order optical nonlinearities of styryl7 dye

Optik ◽  
2014 ◽  
Vol 125 (20) ◽  
pp. 6152-6154 ◽  
Author(s):  
S. Kumaresan ◽  
M. Basheer Ahamed
Keyword(s):  
Optical Nonlinearities ◽  
Third Order ◽  
Single Beam ◽  
The Third

Microstructures and the third-order optical nonlinearities of semimetal Bi nanocrystals in the sodium borosilicate glass

2011 ◽  
Vol 65 (12) ◽  
pp. 1959-1962 ◽  
Author(s):  
Xinyu Yang ◽  
Weidong Xiang ◽  
Haitao Liu ◽  
Haijun Zhao ◽  
Xiyan Zhang ◽  
...  
Keyword(s):  
Borosilicate Glass ◽  
Optical Nonlinearities ◽  
Sodium Borosilicate Glass ◽  
Third Order ◽  
The Third
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