Sensitivity of actuation dynamics of Casimir oscillators on finite temperature with topological insulator materials: Response of repulsive vs attractive interactions

Tajik, Fatemeh; Palasantzas, G.

doi:10.1016/j.physleta.2023.129032

Cited by 4 publications

(3 citation statements)

References 27 publications

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“…In addition to improvements in experimental methodology, considerable rogress has also been achieved with the use of complicated geometries [61,62] other than the sinusoidally corrugated cases discussed above. Many other exciting geometric dependences [63][64][65][66] and material-dependent repulsive forces [9,[67][68][69][70][71] remain to be investigated and exploited in nanomechanical devices [72,73]. Casimir torques [74,75] and their experimental exploitation represent another area of much promise.…”

Section: Discussionmentioning

confidence: 99%

A Brief Review of Some Recent Precision Casimir Force Measurements

Dhital,

Mohideen

2024

Physics

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Section: Discussionmentioning

confidence: 99%

A Brief Review of Some Recent Precision Casimir Force Measurements

Dhital,

Mohideen

2024

Physics

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“…This is because the Lifshitz theory allows to compute the tuning of the Casimir force, actually, for both the magnitude and direction, by a suitable choice of the interacting materials with the necessary optical properties [18][19][20][21]. As a result, several studies have been performed on the effect of optical properties on the actuation dynamic of devices in order to widen the range of their applications [22][23][24][25]. For example, in Ref.…”

Section: Introductionmentioning

confidence: 99%

“…Finally, in Ref. [25], it was demonstrated how the magnetoelectric effect in micro devices consisting of topological insulators can become dominant on the operation of MEMS and taking into account its sensitive dependence on thermal fluctuations.…”

Section: Introductionmentioning

confidence: 99%

Dynamical Sensitivity of Three-Layer Micro Electromechanical Systems to the Optical Properties of the Intervening Liquid Layer

Tajik,

Palasantzas

2023

Physics

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Here, we investigate the actuation dynamics of a micro device with different intervening liquids between the actuating components under the influence of Casimir and dissipative hydrodynamic forces. This is enabled via phase space portraits, which demonstrate that by increasing the dielectric response of the intervening layer the autonomous device may not come into stiction due to the decreasing in magnitude Casmir force. Unlike the micro devices that are placed in vacuum with an intervening liquid, the phase portraits show only a spiral trajectory which eventually stops at a rest position due to the strong energy dissipation by the position dependent hydrodynamic drag forces, even when considering sufficiently strong restoring forces. Moreover, it is feasible to expand the area of motion using intervening liquids with lower dynamic viscosity or increasing the slip length of the intervening fluid. Finally, under the influence of an external driven force, which is the realistic case for possible applications, the system can reach stable oscillation at larger separations with an amplitude higher for the liquid that led to lower Casimir and hydrodynamic forces. Hence, the results presented in this study are essential for studying the dynamical behavior of MEMS and their design in liquid environments.

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