scholarly journals Parametric strong mode-coupling in carbon nanotube mechanical resonators

Nanoscale ◽  
2016 ◽  
Vol 8 (31) ◽  
pp. 14809-14813 ◽  
Author(s):  
Shu-Xiao Li ◽  
Dong Zhu ◽  
Xin-He Wang ◽  
Jiang-Tao Wang ◽  
Guang-Wei Deng ◽  
...  
Keyword(s):  
Carbon Nanotube ◽  
Mode Coupling ◽  
Mechanical Resonators ◽  
Strong Mode

scholarly journals Principal modes in multimode fibers: exploring the crossover from weak to strong mode coupling

2017 ◽  
Vol 25 (3) ◽  
pp. 2709 ◽  
Author(s):  
Wen Xiong ◽  
Philipp Ambichl ◽  
Yaron Bromberg ◽  
Brandon Redding ◽  
Stefan Rotter ◽  
...  
Keyword(s):  
Mode Coupling ◽  
Multimode Fibers ◽  
Strong Mode

Mode coupling and locking of a Π-shaped cantilever resonator using laser-induced asymmetric modulation

2021 ◽  
Author(s):  
Wenyao Luo ◽  
Naikun Gao ◽  
Yanyan Li ◽  
Zhixin Zhao ◽  
Duo Liu
Keyword(s):  
Information Technology ◽  
Quality Factor ◽  
Mode Coupling ◽  
Microelectromechanical Systems ◽  
Mechanical Resonators ◽  
Signal To Noise ◽  
Resonant Frequencies ◽  
Asymmetric Modulation ◽  
Specific Geometry ◽  
Cantilevered Beams

Abstract Mechanical resonators, such as microcantilevers, demonstrate significant potential for use in information technology. Cantilevered beams of various geometries clamped at one end form the most ubiquitous structures in microelectromechanical systems (MEMSs) that support multimode vibration for the detection, conversion, and processing of small signals. In this study, we demonstrate that the potential of these devices can be further extended by utilizing a strategy based on mode coupling and locking induced by asymmetric photothermal modulation. A cantilever was designed to have a Π-shape with a specific geometry such that the resonant frequencies of the two orthogonal modes are close to one another. Additionally, we show that mode coupling between the two modes, which are originally orthogonal to one another, can be achieved through laser-induced photothermal modulation. In particular, the two modes can be parametrically tuned to become degenerate through mode coupling with a significant increase in the quality factor from 112 to 839. This approach is universal and can be extended to improve the detection limits of microresonators in high-dissipation environments with enhanced signal-to-noise ratios.

scholarly journals Suppression of nonlinear distortion in few-mode fibres using strong mode coupling

2016 ◽  
Author(s):  
Filipe M. Ferreira ◽  
Naoise Mac Suibhne ◽  
Christian Sanchez ◽  
Stylianos Sygletos ◽  
Andrew Ellis
Keyword(s):  
Mode Coupling ◽  
Nonlinear Distortion ◽  
Strong Mode

Principal modes of a multimode fiber with strong mode coupling

2016 ◽  
Author(s):  
Wen Xiong ◽  
Philipp Ambichl ◽  
Yaron Bromberg ◽  
Brandon Redding ◽  
Stefan Rotter ◽  
...  
Keyword(s):  
Mode Coupling ◽  
Multimode Fiber ◽  
Strong Mode

scholarly journals Dissipative and conservative nonlinearity in carbon nanotube and graphene mechanical resonators

2012 ◽  
pp. 341-361 ◽  
Author(s):  
J. Moser ◽  
A. Eichler ◽  
B. Lassagne ◽  
J. Chaste ◽  
Y. Tarakanov ◽  
...  
Keyword(s):  
Carbon Nanotube ◽  
Mechanical Resonators

Can strong mode coupling be exploited?

1994 ◽  
Vol 95 (5) ◽  
pp. 2879-2879
Author(s):  
B. Edward McDonald ◽  
W. A. Kuperman
Keyword(s):  
Mode Coupling ◽  
Strong Mode

Influence of aspect ratio, plasma viscosity, and radial position of the resonant surfaces on the plasmoid formation in the low resistivity plasma in Tokamak

2021 ◽  
Author(s):  
Wei Zhang ◽  
Zhiwei Ma ◽  
Haowei Zhang ◽  
Wen Jin CHEN ◽  
Xin Wang
Keyword(s):  
Aspect Ratio ◽  
Mode Coupling ◽  
Nonlinear Evolution ◽  
Plasma Viscosity ◽  
Cylindrical Geometry ◽  
Radial Position ◽  
Radial Location ◽  
Low Resistivity ◽  
Kink Mode ◽  
Strong Mode

Abstract In the present paper, we systematically investigate the nonlinear evolution of the resistive kink mode in the low resistivity plasma in Tokamak geometry. We find that the aspect ratio of the initial equilibrium can significantly influence the critical resistivity for plasmoid formation. With the aspect ratio of 3/1, the critical resistivity can be one magnitude larger than that in cylindrical geometry due to the strong mode-mode coupling. We also find that the critical resistivity for plasmoid formation decreases with increasing plasma viscosity in the moderately low resistivity regime. Due to the geometry of Tokamaks, the critical resistivity for plasmoid formation increases with the increasing radial location of the resonant surface.

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