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Bondarev IV, Pugh MD, Rodriguez-Lopez P, Woods LM, Antezza M. Confinement-induced nonlocality and casimir force in transdimensional systems. Phys Chem Chem Phys 2023; 25:29257-29265. [PMID: 37874297 DOI: 10.1039/d3cp03706a] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2023]
Abstract
We study within the framework of the Lifshitz theory the long-range Casimir force for in-plane isotropic and anisotropic free-standing transdimensional material slabs. In the former case, we show that the confinement-induced nonlocality not only weakens the attraction of ultrathin slabs but also changes the distance dependence of the material-dependent correction to the Casimir force to go as contrary to the ∼1/l dependence of that of the local Lifshitz force. In the latter case, we use closely packed array of parallel aligned single-wall carbon nanotubes in a dielectric layer of finite thickness to demonstrate strong orientational anisotropy and crossover behavior for the inter-slab attractive force in addition to its reduction with decreasing slab thickness. We give physical insight as to why such a pair of ultrathin slabs prefers to stick together in the perpendicularly oriented manner, rather than in the parallel relative orientation as one would customarily expect.
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Affiliation(s)
- Igor V Bondarev
- Department of Mathematics & Physics, North Carolina Central University, Durham, NC 27707, USA.
| | - Michael D Pugh
- Department of Mathematics & Physics, North Carolina Central University, Durham, NC 27707, USA.
| | - Pablo Rodriguez-Lopez
- Área de Electromagnetismo and Grupo Interdisciplinar de Sistemas Complejos (GISC), Universidad Rey Juan Carlos, 28933 Móstoles, Madrid, Spain
- Laboratoire Charles Coulomb (L2C), UMR 5221 CNRS-University of Montpellier, F-34095 Montpellier, France
| | - Lilia M Woods
- Department of Physics, University of South Florida, Tampa, FL 33620, USA
| | - Mauro Antezza
- Laboratoire Charles Coulomb (L2C), UMR 5221 CNRS-University of Montpellier, F-34095 Montpellier, France
- Institut Universitaire de France, 1 rue Descartes, F-75231 Paris Cedex 05, France
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2
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Tkatchenko A, Fedorov DV. Casimir Self-Interaction Energy Density of Quantum Electrodynamic Fields. PHYSICAL REVIEW LETTERS 2023; 130:041601. [PMID: 36763430 DOI: 10.1103/physrevlett.130.041601] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/08/2022] [Revised: 08/21/2022] [Accepted: 12/20/2022] [Indexed: 06/18/2023]
Abstract
Quantum electrodynamic fields possess fluctuations corresponding to transient particle-antiparticle dipoles, which can be characterized by a nonvanishing polarizability density. Here, we extend a recently proposed quantum scaling law to describe the volumetric and radial polarizability density of a quantum field corresponding to electrons and positrons and derive the Casimir self-interaction energy (SIE) density of the field, E[over ¯]_{SIE}, in terms of the fine-structure constant. The proposed model obeys the cosmological equation of state w=-1 and the magnitude of the calculated E[over ¯]_{SIE} lies in between the two recent measurements of the cosmological constant Λ obtained by the Planck Mission and the Hubble Space Telescope.
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Affiliation(s)
- Alexandre Tkatchenko
- Department of Physics and Materials Science, University of Luxembourg, L-1511 Luxembourg City, Luxembourg
| | - Dmitry V Fedorov
- Department of Physics and Materials Science, University of Luxembourg, L-1511 Luxembourg City, Luxembourg
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3
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Flick J. Simple Exchange-Correlation Energy Functionals for Strongly Coupled Light-Matter Systems Based on the Fluctuation-Dissipation Theorem. PHYSICAL REVIEW LETTERS 2022; 129:143201. [PMID: 36240406 DOI: 10.1103/physrevlett.129.143201] [Citation(s) in RCA: 7] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/19/2021] [Revised: 07/01/2022] [Accepted: 08/05/2022] [Indexed: 06/16/2023]
Abstract
Recent experimental advances in strongly coupled light-matter systems have sparked the development of general ab initio methods capable of describing interacting light-matter systems from first principles. One of these methods, quantum-electrodynamical density-functional theory (QEDFT), promises computationally efficient calculations for large correlated light-matter systems with the quality of the calculation depending on the underlying approximation for the exchange-correlation functional. So far no true density-functional approximation has been introduced limiting the efficient application of the theory. In this Letter, we introduce the first gradient-based density functional for the QEDFT exchange-correlation energy derived from the adiabatic-connection fluctuation-dissipation theorem. We benchmark this simple-to-implement approximation on small systems in optical cavities and demonstrate its relatively low computational costs for fullerene molecules up to C_{180} coupled to 400 000 photon modes in a dissipative optical cavity. This Letter now makes first principle calculations of much larger systems possible within the QEDFT framework effectively combining quantum optics with large-scale electronic structure theory.
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Affiliation(s)
- Johannes Flick
- Center for Computational Quantum Physics, Flatiron Institute, New York, New York 10010, USA
- Department of Physics, City College of New York, New York, New York 10031, USA
- Department of Physics, The Graduate Center, City University of New York, New York, New York 10016, USA
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4
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Yang J, Liu X, Guo W. Nonmonotonous Distance Dependence of van der Waals Screening by a Dielectric Layer. J Phys Chem Lett 2021; 12:4993-4999. [PMID: 34015923 DOI: 10.1021/acs.jpclett.1c00870] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/12/2023]
Abstract
Van der Waals (vdW) screening or Faraday-cage-like screening of vdW interaction by monolayer crystals has recently been observed in experiments and understood from first-principles theories. Here, we investigate the vdW screening by a bulky dielectric layer using the Lifshitz theory. The ratio of vdW screening is found to depend on not only the interobject distance but also the thicknesses of the separated layers. Surprisingly, the screening ratio exhibits a nonmonotonous distance dependence, first increasing, but beyond a critical distance reducing, toward zero. The short-range trend coincides with that predicted for graphene-like trilayers by the random phase approximation, while the long-range trend poses a contrast to the increasing screening with distance by graphene predicted by the many-body dispersion approach. The positive correlation between the screening ratio and the dielectric constant revealed for atomistic layers is reproduced for the bulky dielectric layers.
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Affiliation(s)
- Jiabao Yang
- State Key Laboratory of Mechanics and Control of Mechanical Structures, Key Laboratory for Intelligent Nano Materials and Devices of Ministry of Education, Nanjing University of Aeronautics and Astronautics, Nanjing 210016, China
| | - Xiaofei Liu
- State Key Laboratory of Mechanics and Control of Mechanical Structures, Key Laboratory for Intelligent Nano Materials and Devices of Ministry of Education, Nanjing University of Aeronautics and Astronautics, Nanjing 210016, China
| | - Wanlin Guo
- State Key Laboratory of Mechanics and Control of Mechanical Structures, Key Laboratory for Intelligent Nano Materials and Devices of Ministry of Education, Nanjing University of Aeronautics and Astronautics, Nanjing 210016, China
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5
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Lao KU, Yang Y, DiStasio RA. Electron confinement meet electron delocalization: non-additivity and finite-size effects in the polarizabilities and dispersion coefficients of the fullerenes. Phys Chem Chem Phys 2021; 23:5773-5779. [PMID: 33666598 DOI: 10.1039/d0cp05638c] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
In this work, we used finite-field derivative techniques and density functional theory (DFT) to compute the static isotropic polarizability series (αl with l = 1, 2, 3) for the C60-C84 fullerenes and quantitatively assess the intrinsic non-additivity in these fundamental response properties. By comparing against classical models of the fullerenes as conducting spherical shells (or solid spheres) of uniform electron density, a detailed critical analysis of the derived effective scaling laws (α1 ∼ N1.2, α2 ∼ N2.0, α3 ∼ N2.7) demonstrates that the electronic structure of finite-sized fullerenes-a unique dichotomy of electron confinement and delocalization effects due to their quasi-spherical cage-like structures and encapsulated void spaces-simultaneously limits and enhances their quantum mechanical response to electric field perturbations. Corresponding frequency-dependent polarizabilities were obtained by inputting the αl series into the hollow sphere model (within the modified single frequency approximation), and used to compute the molecular dispersion coefficients (Cn with n = 6, 8, 9, 10) needed to describe the non-trivial van der Waals (vdW) interactions in fullerene-based systems. Using first-order perturbation theory in conjunction with >140 000 DFT calculations, we also computed the non-negligible zero-point vibrational contributions to α1 in C60 and C70, thereby enabling a more accurate and direct comparison between theory and experiment for these quintessential nanostructures.
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Affiliation(s)
- Ka Un Lao
- Department of Chemistry and Chemical Biology, Cornell University, Ithaca, NY 14853, USA.
| | - Yan Yang
- Department of Chemistry and Chemical Biology, Cornell University, Ithaca, NY 14853, USA.
| | - Robert A DiStasio
- Department of Chemistry and Chemical Biology, Cornell University, Ithaca, NY 14853, USA.
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6
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Wang M, Tang L, Ng CY, Messina R, Guizal B, Crosse JA, Antezza M, Chan CT, Chan HB. Strong geometry dependence of the Casimir force between interpenetrated rectangular gratings. Nat Commun 2021; 12:600. [PMID: 33500401 PMCID: PMC7838308 DOI: 10.1038/s41467-021-20891-4] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/02/2020] [Accepted: 12/28/2020] [Indexed: 12/05/2022] Open
Abstract
Quantum fluctuations give rise to Casimir forces between two parallel conducting plates, the magnitude of which increases monotonically as the separation decreases. By introducing nanoscale gratings to the surfaces, recent advances have opened opportunities for controlling the Casimir force in complex geometries. Here, we measure the Casimir force between two rectangular silicon gratings. Using an on-chip detection platform, we achieve accurate alignment between the two gratings so that they interpenetrate as the separation is reduced. Just before interpenetration occurs, the measured Casimir force is found to have a geometry dependence that is much stronger than previous experiments, with deviations from the proximity force approximation reaching a factor of ~500. After the gratings interpenetrate each other, the Casimir force becomes non-zero and independent of displacement. This work shows that the presence of gratings can strongly modify the Casimir force to control the interaction between nanomechanical components. The geometry dependence of the Casimir force could enable applications in nanomechanical systems if the effects can be enhanced. Here, the authors demonstrate that the Casimir force between two interpenetrating nanoscale gratings can exceed the proximity force approximation by a factor of 500.
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Affiliation(s)
- Mingkang Wang
- Department of Physics, The Hong Kong University of Science and Technology, Clear Water Bay, Kowloon, Hong Kong, China.,William Mong Institute of Nano Science and Technology, The Hong Kong University of Science and Technology, Clear Water Bay, Kowloon, Hong Kong, China.,Center for Metamaterial Research, The Hong Kong University of Science and Technology, Clear Water Bay, Kowloon, Hong Kong, China
| | - L Tang
- Department of Physics, The Hong Kong University of Science and Technology, Clear Water Bay, Kowloon, Hong Kong, China.,William Mong Institute of Nano Science and Technology, The Hong Kong University of Science and Technology, Clear Water Bay, Kowloon, Hong Kong, China.,Center for Metamaterial Research, The Hong Kong University of Science and Technology, Clear Water Bay, Kowloon, Hong Kong, China
| | - C Y Ng
- Department of Physics, The Hong Kong University of Science and Technology, Clear Water Bay, Kowloon, Hong Kong, China
| | - Riccardo Messina
- Laboratoire Charles Fabry, UMR 8501, Institut d'Optique, CNRS, Université Paris-Saclay, 2 Avenue Augustin Fresnel, 91127, Palaiseau Cedex, France.,Laboratoire Charles Coulomb (L2C), UMR 5221 CNRS-Université de Montpellier, F-34095, Montpellier, France
| | - Brahim Guizal
- Laboratoire Charles Coulomb (L2C), UMR 5221 CNRS-Université de Montpellier, F-34095, Montpellier, France
| | - J A Crosse
- New York University Shanghai, 1555 Century Ave, Pudong, 200122, Shanghai, China.,NYU-ECNU Institute of Physics at NYU Shanghai, 3663 Zhongshan Road North, 200062, Shanghai, China
| | - Mauro Antezza
- Laboratoire Charles Coulomb (L2C), UMR 5221 CNRS-Université de Montpellier, F-34095, Montpellier, France.,Institut Universitaire de France, 1 rue Descartes, F-75231, Paris, France
| | - C T Chan
- Department of Physics, The Hong Kong University of Science and Technology, Clear Water Bay, Kowloon, Hong Kong, China
| | - H B Chan
- Department of Physics, The Hong Kong University of Science and Technology, Clear Water Bay, Kowloon, Hong Kong, China. .,William Mong Institute of Nano Science and Technology, The Hong Kong University of Science and Technology, Clear Water Bay, Kowloon, Hong Kong, China. .,Center for Metamaterial Research, The Hong Kong University of Science and Technology, Clear Water Bay, Kowloon, Hong Kong, China.
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7
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Fang W, Li GX, Xu J, Yang Y. Enhancement of long-distance Casimir-Polder interaction between an excited atom and a cavity made of metamaterials. OPTICS EXPRESS 2019; 27:37753-37770. [PMID: 31878551 DOI: 10.1364/oe.27.037753] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/14/2019] [Accepted: 11/28/2019] [Indexed: 06/10/2023]
Abstract
Within the framework of macroscopic quantum electrodynamics, we investigate both the radiation force and the potential of Casimir-Polder type acting on an excited cold two-level atom in a cavity made of left-handed materials and topological insulators. As the time-reversal symmetry is broken on the surface of the topological insulators, the spontaneous emission of the atom placed near the focus point(s) exhibits anisotropic properties. While the potential wells are normally shallow for topological trivial dielectric, they may be amplified in the presence of topological magnetoelectric effect. We find that when there exists only one focus point in the cavity, it is possible to boost the forces or the potential wells by up to one order of magnitude. Meanwhile, the lifetime of the atom could be prolonged owing to the focus effect of the left-handed materials, where the emitted photons can trace back to the atom and reabsorbed by itself. Our results indicate the possibility in forming long-lived potential wells, which may have potential applications in trapping and guiding cold atoms far away from the surface.
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8
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Venkataram PS, Hermann J, Vongkovit TJ, Tkatchenko A, Rodriguez AW. Impact of nuclear vibrations on van der Waals and Casimir interactions at zero and finite temperature. SCIENCE ADVANCES 2019; 5:eaaw0456. [PMID: 31700997 PMCID: PMC6824855 DOI: 10.1126/sciadv.aaw0456] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 11/13/2018] [Accepted: 09/16/2019] [Indexed: 06/10/2023]
Abstract
Recent advances in measuring van der Waals (vdW) interactions have probed forces on molecules at nanometric separations from metal surfaces and demonstrated the importance of infrared nonlocal polarization response and temperature effects, yet predictive theories for these systems remain lacking. We present a theoretical framework for computing vdW interactions among molecular structures, accounting for geometry, short-range electronic delocalization, dissipation, and collective nuclear vibrations (phonons) at atomic scales, along with long-range electromagnetic interactions in arbitrary macroscopic environments. We primarily consider experimentally relevant low-dimensional carbon allotropes, including fullerenes, carbyne, and graphene, and find that phonons couple strongly with long-range electromagnetic fields depending on molecular dimensionality and dissipation, especially at nanometric scales, creating delocalized phonon polaritons that substantially modify infrared molecular response. These polaritons, in turn, alter vdW interaction energies between molecular and macroscopic structures, producing nonmonotonic power laws and nontrivial temperature variations at nanometric separations feasible in current experiments.
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Affiliation(s)
| | - Jan Hermann
- Physics and Materials Science Research Unit, University of Luxembourg, L-1511 Luxembourg
| | | | - Alexandre Tkatchenko
- Physics and Materials Science Research Unit, University of Luxembourg, L-1511 Luxembourg
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9
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Pollice R, Fleckenstein F, Shenderovich I, Chen P. Compensation of London Dispersion in the Gas Phase and in Aprotic Solvents. Angew Chem Int Ed Engl 2019; 58:14281-14288. [DOI: 10.1002/anie.201905436] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/02/2019] [Revised: 07/17/2019] [Indexed: 12/13/2022]
Affiliation(s)
- Robert Pollice
- ETH Zürich Laboratorium für Organische Chemie Vladimir-Prelog-Weg 2, HCI G207/ETH Zürich Zürich 8093 Switzerland
| | - Felix Fleckenstein
- ETH Zürich Laboratorium für Organische Chemie Vladimir-Prelog-Weg 2, HCI G207/ETH Zürich Zürich 8093 Switzerland
| | - Ilya Shenderovich
- Universität Regensburg Fakultät für Chemie und Pharmazie Universitätsstraße 31 Regensburg 93040 Germany
| | - Peter Chen
- ETH Zürich Laboratorium für Organische Chemie Vladimir-Prelog-Weg 2, HCI G207/ETH Zürich Zürich 8093 Switzerland
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10
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Pollice R, Fleckenstein F, Shenderovich I, Chen P. Compensation of London Dispersion in the Gas Phase and in Aprotic Solvents. Angew Chem Int Ed Engl 2019. [DOI: 10.1002/ange.201905436] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Affiliation(s)
- Robert Pollice
- ETH Zürich Laboratorium für Organische Chemie Vladimir-Prelog-Weg 2, HCI G207/ETH Zürich Zürich 8093 Switzerland
| | - Felix Fleckenstein
- ETH Zürich Laboratorium für Organische Chemie Vladimir-Prelog-Weg 2, HCI G207/ETH Zürich Zürich 8093 Switzerland
| | - Ilya Shenderovich
- Universität Regensburg Fakultät für Chemie und Pharmazie Universitätsstraße 31 Regensburg 93040 Germany
| | - Peter Chen
- ETH Zürich Laboratorium für Organische Chemie Vladimir-Prelog-Weg 2, HCI G207/ETH Zürich Zürich 8093 Switzerland
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11
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Van der Waals forces in free and wetting liquid films. Adv Colloid Interface Sci 2019; 269:357-369. [PMID: 31129337 DOI: 10.1016/j.cis.2019.04.013] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/12/2018] [Revised: 03/27/2019] [Accepted: 04/28/2019] [Indexed: 11/23/2022]
Abstract
Van der Waals interactions induced by fluctuations of electromagnetic field bear universal nature and act between individual atoms, condensed particles or bodies of any type. Continuously growing interest to theoretical understanding as well as to precise evaluation of van der Waals forces is caused by their fundamental role in many physical, chemical, and biological processes. In this paper, we scrutinize progress in the studies of van der Waals forces, related to recent active development of Coupled Dipole Method (CDM) for the analysis of the behavior and properties of nanosized systems. The application of CDM for the analysis of thin liquid films allowed achieving substantial progress in understanding the behavior of free and wetting films. It was shown that both the macroscopic properties, such as excess free energy and Hamaker constants and the local microscopic parameters, such as polarizabilities, can be successfully calculated based only on properties of individual molecules. The impact of lateral film confinement on the specific excess free energy and the film stability was elucidated, and effect of spatial constraints on the spectrum of vibrational states for liquid film and the underlying substrate was analyzed. It was shown that van der Waals interactions between molecules represent the universal mechanism for dynamic structuring and formation of boundary layers and that the CDM allows self-consistently calculating the properties of these layers in both solid and liquid phases.
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12
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Lin Z, Liu V, Pestourie R, Johnson SG. Topology optimization of freeform large-area metasurfaces. OPTICS EXPRESS 2019; 27:15765-15775. [PMID: 31163767 DOI: 10.1364/oe.27.015765] [Citation(s) in RCA: 28] [Impact Index Per Article: 5.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/08/2019] [Accepted: 03/20/2019] [Indexed: 06/09/2023]
Abstract
We demonstrate optimization of optical metasurfaces over 105-106 degrees of freedom in two and three dimensions, 100-1000+ wavelengths (λ) in diameter, with 100+ parameters per λ2. In particular, we show how topology optimization, with one degree of freedom per high-resolution "pixel," can be extended to large areas with the help of a locally periodic approximation that was previously only used for a few parameters per λ2. In this way, we can computationally discover completely unexpected metasurface designs for challenging multi-frequency, multi-angle problems, including designs for fully coupled multi-layer structures with arbitrary per-layer patterns. Unlike typical metasurface designs based on subwavelength unit cells, our approach can discover both sub- and supra-wavelength patterns and can obtain both the near and far fields.
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13
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Yang Y, Lao KU, DiStasio RA. Influence of Pore Size on the van der Waals Interaction in Two-Dimensional Molecules and Materials. PHYSICAL REVIEW LETTERS 2019; 122:026001. [PMID: 30720298 DOI: 10.1103/physrevlett.122.026001] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/02/2018] [Revised: 10/09/2018] [Indexed: 06/09/2023]
Abstract
Despite the importance of porous two-dimensional (2D) molecules and materials in advanced technological applications, the question of how the void space in these systems affects the van der Waals (vdW) scaling landscape has been largely unanswered. Analytical and numerical models presented herein demonstrate that the mere presence of a pore leads to markedly different vdW scaling across nonasymptotic distances, with certain relative pore sizes yielding effective power laws ranging from simple monotonic decay to the formation of minima, extended plateaus, and even maxima. These models are in remarkable agreement with first-principles approaches for the 2D building blocks of covalent organic frameworks (COFs), and reveal that COF macrocycle dimers and periodic bilayers exhibit unique vdW scaling behavior that is quite distinct from their nonporous analogs. These findings extend across a range of distances relevant to the nanoscale, and represent a hitherto unexplored avenue towards governing the self-assembly of complex nanostructures from porous 2D molecules and materials.
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Affiliation(s)
- Yan Yang
- Department of Chemistry and Chemical Biology, Cornell University, Ithaca, New York 14853, USA
| | - Ka Un Lao
- Department of Chemistry and Chemical Biology, Cornell University, Ithaca, New York 14853, USA
| | - Robert A DiStasio
- Department of Chemistry and Chemical Biology, Cornell University, Ithaca, New York 14853, USA
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14
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Venkataram PS, Hermann J, Tkatchenko A, Rodriguez AW. Phonon-Polariton Mediated Thermal Radiation and Heat Transfer among Molecules and Macroscopic Bodies: Nonlocal Electromagnetic Response at Mesoscopic Scales. PHYSICAL REVIEW LETTERS 2018; 121:045901. [PMID: 30095944 DOI: 10.1103/physrevlett.121.045901] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/19/2018] [Indexed: 06/08/2023]
Abstract
Thermal radiative phenomena can be strongly influenced by the coupling of phonons and long-range electromagnetic fields at infrared frequencies. Typically employed macroscopic descriptions of thermal fluctuations often ignore atomistic effects that become relevant at nanometric scales, whereas purely microscopic treatments ignore long-range, geometry-dependent electromagnetic effects. We describe a mesoscopic framework for modeling thermal fluctuation phenomena among molecules near macroscopic bodies, conjoining atomistic treatments of electronic and vibrational fluctuations obtained from density functional theory in the former with continuum descriptions of electromagnetic scattering in the latter. The interplay of these effects becomes particularly important at mesoscopic scales, where phonon polaritons can be strongly influenced by the objects' finite sizes, shapes, and nonlocal or many-body response to electromagnetic fluctuations. We show that, even in small but especially in elongated low-dimensional molecules, such effects can modify thermal emission and heat transfer by orders of magnitude and produce qualitatively different behavior compared to predictions based on local, dipolar, or pairwise approximations.
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Affiliation(s)
- Prashanth S Venkataram
- Department of Electrical Engineering, Princeton University, Princeton, New Jersey 08544, USA
| | - Jan Hermann
- Physics and Materials Science Research Unit, University of Luxembourg, L-1511 Luxembourg
| | - Alexandre Tkatchenko
- Physics and Materials Science Research Unit, University of Luxembourg, L-1511 Luxembourg
| | - Alejandro W Rodriguez
- Department of Electrical Engineering, Princeton University, Princeton, New Jersey 08544, USA
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15
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Ambrosetti A, Silvestrelli PL. Anomalous van der Waals-Casimir interactions on graphene: A concerted effect of temperature, retardation, and non-locality. J Chem Phys 2018; 148:134709. [DOI: 10.1063/1.5023170] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022] Open
Affiliation(s)
- Alberto Ambrosetti
- Dipartimento di Fisica e Astronomia, Università degli Studi di Padova, Via Marzolo 8, 35131 Padova, Italy
| | - Pier Luigi Silvestrelli
- Dipartimento di Fisica e Astronomia, Università degli Studi di Padova, Via Marzolo 8, 35131 Padova, Italy
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