Geometry and charge carrier induced stability in Casimir actuated nanodevices

Esquivel‐Sirvent, R.; Pérez-Pascual, R.

doi:10.1140/epjb/e2013-40779-5

Cited by 24 publications

(25 citation statements)

References 48 publications

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“…For this purpose (11) has been used where the reflection coefficients are given by (12) and (4). The latter equation was expressed in terms of the dimensionless variables with account of (14).…”

Section: Silica Filmsmentioning

confidence: 99%

“…For this purpose, we consider Al 2 O 3 films covering a Si plate and perform numerical computations using the same (11), (12), and (4), as for SiO 2 films.…”

Section: Sapphire Filmsmentioning

confidence: 99%

“…They are responsible for interaction of electrically neutral, but polarizable, particles with material surfaces [7,8,9,10], find applications in nanoscience [11,12,13,14], play important role in many effects of condensed matter physics [15,16,17,18,19,20], and are even used in elementary particle physics for constraining some theoretical predictions beyond the standard model [21,22,23].…”

Section: Introductionmentioning

confidence: 99%

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Casimir free energy of dielectric films: classical limit, low-temperature behavior and control

Mostepanenko¹

2017

J. Phys.: Condens. Matter

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Abstract. The Casimir free energy of dielectric films, both free-standing in vacuum and deposited on metallic or dielectric plates, is investigated. It is shown that the values of the free energy depend considerably on whether the calculation approach used neglects or takes into account the dc conductivity of film material. We demonstrate that there are the material-dependent and universal classical limits in the former and latter cases, respectively. The analytic behavior of the Casimir free energy and entropy for a free-standing dielectric film at low temperature is found. According to our results, the Casimir entropy goes to zero when the temperature vanishes if the calculation approach with neglected dc conductivity of a film is employed. If the dc conductivity is taken into account, the Casimir entropy takes the positive value at zero temperature, depending on the parameters of a film, i.e., the Nernst heat theorem is violated. By considering the Casimir free energy of SiO 2 and Al 2 O 3 films deposited on a Au plate in the framework of two calculation approaches, we argue that physically correct values are obtained by disregarding the role of dc conductivity. A comparison with the well known results for the configuration of two parallel plates is made. Finally, we compute the Casimir free energy of SiO 2 , Al 2 O 3 and Ge films deposited on high-resistivity Si plates of different thicknesses and demonstrate that it can be positive, negative and equal to zero. The effect of illumination of a Si plate with laser light is considered. Possible applications of the obtained results to thin films used in microelectronics are discussed.

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Section: Silica Filmsmentioning

confidence: 99%

“…For this purpose, we consider Al 2 O 3 films covering a Si plate and perform numerical computations using the same (11), (12), and (4), as for SiO 2 films.…”

Section: Sapphire Filmsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Casimir free energy of dielectric films: classical limit, low-temperature behavior and control

Mostepanenko¹

2017

J. Phys.: Condens. Matter

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“…One of the most striking macroscopic effects of this kind is the Casimir force [3] resulting from the zero-point and thermal fluctuations. This force manifests itself in many branches of physics ranging from atomic physics, condensed matter physics to elementary particle physics, gravitation and cosmology [4], and is actively considered to be used in the next generation of microdevices with reduced dimensions [5][6][7][8][9][10][11].…”

Section: Introductionmentioning

confidence: 99%

Casimir pressure between metallic plates out of thermal equilibrium: Proposed test for the relaxation properties of free electrons

Mostepanenko

Sedmik

2019

Phys. Rev. A

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We propose a test on the role of relaxation properties of conduction electrons in the Casimir pressure between two parallel metal-coated plates kept at different temperatures. It is shown that for sufficiently thick metallic coatings the Casimir pressure and pressure gradient are determined by the mean of the equilibrium contributions calculated at temperatures of the two plates and by the term independent on separation. Numerical computations of the nonequilibrium pressures are performed for two parallel Au plates of finite thickness as a function of separation and temperature of one of the plates using the plasma and Drude models for extrapolation of the optical data of Au to low frequencies. The obtained results essentially depend on the extrapolation used.Modifications of the CANNEX setup, originally developed to measure the Casimir pressure and pressure gradient in thermal equilibrium, are suggested, which allow different temperatures of one of the plates. Computations of the nonequilibrium pressure and pressure gradient are performed for a realistic experimental configuration. According to our results, even with only a 10 K difference in temperature between the plates, the experiment could discriminate between different theoretical predictions for the total pressure and its gradient, as well as for the contributions to them due to nonequilibrium, at high confidence.

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“…Thus, the stability of Casimir-actuated microdevices depending on geometry and dielectric properties of materials was considered in Refs. [3,4]. The role of surface roughness in the actuation of microelectromechanical systems by the Casimir force was found [5,6].…”

Section: Introductionmentioning

confidence: 96%

Graphene may help to solve the Casimir conundrum in indium tin oxide systems

Mostepanenko¹

2018

Phys. Rev. B

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We reconsider the long-explored problem that the magnitude of the measured Casimir force between an Au sphere and an indium tin oxide (ITO) film decreases significantly with no respective changes in the ITO dielectric permittivity required by the Lifshitz theory. Two plausible resolutions of this conundrum are discussed: the phase transition of an ITO film from metallic to dielectric state and the modification of a film surface under the action of UV light. To exclude the latter option, we propose an improvement in the experimental scheme by adding a graphene sheet on top of an

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Geometry and charge carrier induced stability in Casimir actuated nanodevices

Cited by 24 publications

References 48 publications

Casimir free energy of dielectric films: classical limit, low-temperature behavior and control

Casimir free energy of dielectric films: classical limit, low-temperature behavior and control

Casimir pressure between metallic plates out of thermal equilibrium: Proposed test for the relaxation properties of free electrons

Graphene may help to solve the Casimir conundrum in indium tin oxide systems

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