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CLEO: Fundamental Science, CLEO:FS 2024 - Part of Conference on Lasers and Electro-Optics, CLEO 2024

作者： Wong, Yu-En Johnston, Adam Felix-Rendon, Ulises Chen, Songtao Department of Electrical and Computer Engineering Rice University HoustonTX77005 United States Applied Physics Graduate Program Smalley-Curl Institute Rice University HoustonTX77005 United States Smalley-Curl Institute Rice University HoustonTX77005 United States

We investigate light-matter interactions for a single T center coupled to a silicon photonic crystal cavity. By solving Lindblad master equation, we extract the cavity-QED parameters for the coupled system. © Opt... 详细信息

ISBN: (纸本)9781957171395

关键词： Silicon photonics

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Purcell Enhancement of a Single T Center Coupled to a Silicon Nanophotonic Cavity

Purcell Enhancement of a Single T Center Coupled to a Silico...

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CLEO: Fundamental Science, CLEO:FS 2024 - Part of Conference on Lasers and Electro-Optics, CLEO 2024

作者： Felix-Rendon, Ulises Johnston, Adam Wong, Yu-En Chen, Songtao Department of Electrical and Computer Engineering Rice University HoustonTX77005 United States Applied Physics Graduate Program Smalley-Curl Institute Rice University HoustonTX77005 United States Smalley-Curl Institute Rice University HoustonTX77005 United States

We demonstrate Purcell enhancement of a single T center integrated in a silicon photonic crystal cavity, increasing the fluorescence decay rate by a factor of 6.89 and achieving a photon outcoupling rate of 73.3 kHz. ... 详细信息

ISBN: (纸本)9781957171395

关键词： Silicon photonics

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The Role of Ionization Injection in Direct Laser Acceleration

The Role of Ionization Injection in Direct Laser Acceleratio...

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2023 Optica Nonlinear Optics Topical Meeting, NLO 2023

作者： Cohen, Itamar Meir, Talia Tangtartharakul, Kavin Perelmutter, Lior Elkind, Michal Gershuni, Yonatan Levanon, Assaf Arefiev, Alexey V. Pomerantz, Ishay The School of Physics and Astronomy Tel Aviv University Tel-Aviv Israel The Center for Light-Matter Interaction Tel Aviv University Tel-Aviv Israel Department of Mechanical and Aerospace Engineering University of California San Diego La Jolla CA92093 United States Department of Applied Physics Soreq NRC Yavne81800 Israel

ISBN: (纸本)9781957171234

For the past two decades, intense lasers have supported new schemes for generating high-energy particle beams in university-scale laboratories. With the direct laser acceleration (DLA) method, the leading part of the laser pulse ionizes the target material and forms a positively charged ion plasma channel into which electrons are injected and accelerated. DLA has been realized over a wide range of laser parameters, using low-atomic-number target materials. In this presented work we reveal that at these higher laser intensities, the leading edge of the laser pulse depletes the target material of its ionization electrons prematurely. We demonstrate experimentally and numerically that for efficient DLA to prevail, a target material of sufficiently high atomic number is required to maintain the injection of ionization electrons at the peak intensity of the pulse when the DLA channel is already formed. Optica Nonlinear Optics Topical Meeting 2023 © Optica Publishing Group 2023 © 2023 The Author(s)

关键词： Laser pulses

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Hydrodynamic Performance of Euplectella aspergillum:Simulating Real Life Conditions in the Abyss

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Communications in Computational physics 2023年第1期33卷 273-282页

作者： Giacomo Falcucci Giorgio Amati Pierluigi Fanelli Sauro Succi Maurizio Porfiri Department of Enterprise Engineering“Mario Lucertini” University of Rome“Tor Vergata”RomeItaly Department of Physics Harvard UniversityCambridgeMAUSA High Performance Computing Department CINECA Rome SectionRomeItaly DEIM School of EngineeringUniversity of TusciaViterboItaly Italian Institute of Technology Center for Life Nano-and Neuro-ScienceRomeItaly National Research Council of Italy–Institute for Applied Computing(IAC) RomeItaly Department of Biomedical Engineering Tandon School of EngineeringNew York UniversityNew YorkNYUSA Department of Mechanical and Aerospace Engineering Tandon School of EngineeringNew York UniversityNew YorkNYUSA Center for Urban Science and Progress Tandon School of EngineeringNew York UniversityNew YorkNYUSA

We detail some of the understudied aspects of the flow inside and around the Hexactinellid Sponge Euplectella *** leveraging the flexibility of the Lattice Boltzmann Method,High Performance Computing simulations are performed to dissect the complex conditions corresponding to the actual environment at the bottom of the ocean,at depths between 100 and 1,000 *** large-scale simulations unveil potential clues on the evolutionary adaptations of these deep-sea sponges in response to the surrounding fluid flow,and they open the path to future investigations at the interface between physics,engineering and biology.

关键词： Lattice Boltzmann method fluid-structure interaction sponge hydrodynamics high performance computing complex boundary conditions

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Moon and Mars Solar Power Satellites (SPS) in Comparison to Earth SPS 74

Moon and Mars Solar Power Satellites (SPS) in Comparison to ...

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74th International Astronautical Congress, IAC 2023

作者： Ohnishi, Takahiro Higashigawa, Shuji Kaneko, Miki Horibe, Takumi Kawai, Yumi Matsutomo, Tomu Warigai, Naoki Tanaka, Koji Department of Applied Physics Tokyo University of Science 6-3-1 Niijuku Katsushika Tokyo125-8585 Japan Graduate School of Science and Engineering Department of Mechanical Engineering HOSEI University Kajino-cho 3-7-2 Koganei-shi Tokyo184-8584 Japan Department of Mechanical Engineering Faculty of Science and Engineering HOSEI University Kajino-cho 3-7-2 Koganei-shi Tokyo184-8584 Japan Department of Mechanical and Electrical Engineering Suwa Tokyo University of Science 5000-1 Toyohira Chinoshi Nagano391-0292 Japan ISAS/JAXA Japan

In this project, the study of Lunar SPS and Mars SPS were conducted. And the technical problems related to them were clarified. For each, orbits, transmission time, required number of satellites, the area of the solar array, and the size of the antenna were considered. For Lunar orbit, we found that the required number of satellites is two when the apoapsis altitude is 6000 km, and the periapsis altitude is 100 km. For Mars orbit, the apoapsis altitude is 11, 000 km and the periapsis altitude is 200 km. In addition, at a frequency of 5.8 GHz, the transmission antenna size was 1.2 km for Lunar orbit and 2.2 km for Mars orbit. The transmission distance changes in elliptical orbits. The changes of efficiency caused by them are also estimated. In order to reduce the antenna size, it is necessary to choose higher frequency as operating band and have to use RF power amplifier designed for high frequency band. However, there are some technical problems. Therefore, instead of the RF power amplifier, the use of electron tubes was considered. Copyright © 2023 by the authors. Published by the IAF, with permission and released to the IAF to publish in all forms.

关键词： Lunar Mars Orbit SPS WPT

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Synthesis, Characterisation, and Corrosion Inhibition Performance of a β-Cyclodextrin/Melamine Supramolecular Complex on St20 Steel in Acidic Media

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Journal of Bio- and Tribo-Corrosion 2024年第4期10卷 1-22页

作者： Berdimurodov, Elyor Eliboev, Ilyos Dagdag, Omar Lal, Basant Berisha, Avni Rajabov, Yusufboy Mamatov, Jaykhun Wan Nik, W.B. Kholikov, Abduvali Akbarov, Khamdam Chemical & amp Materials Engineering New Uzbekistan University 54 Mustaqillik Ave. Tashkent100007 Uzbekistan Faculty of Chemistry National University of Uzbekistan Tashkent100034 Uzbekistan Uzbek-Finnish Pedagogical Institute Spitamen Street 166-Home Samarqand Uzbekistan Department of Mechanical Engineering Gachon University Seongnam13120 Korea Republic of Department of Chemistry Institute of Applied Science and Humanities GLA University Mathura281406 India Department of Chemistry Faculty of Natural and Mathematics Science University of Prishtina Prishtina10000 Albania Faculty of Ocean Engineering Technology and Informatics Universiti Malaysia Terengganu Kuala Nerus21030 Malaysia Physics and Chemistry "Tashkent Institute of Irrigation and Agricultural Mechanization Engineers" National Research University Tashkent100000 Uzbekistan Natural Science University of Tashkent for Applied Sciences Str. Gavhar 1 Tashkent100149 Uzbekistan Physics and Chemistry Western Caspian University BakuAZ-1001 Azerbaijan

Corrosion poses major challenges in various industrial sectors such as oil and gas, chemicals, and infrastructure. Traditional corrosion inhibitors have limitations in terms of toxicity and environmental compatibility. Supramolecular complexes are promising as green corrosion inhibitors, as the interaction between host and guest molecules can be tailored for different application needs. This study investigates a β-cyclodextrin (β-CD)/melamine (ME) supramolecular complex. The synthesis of the complex is confirmed by Raman spectroscopy, 1H NMR, and FT-IR methods. A range of characterisation techniques are used to analyse the complex’s structure. Gravimetric and electrochemical tests, including potentiodynamic polarisation and electrochemical impedance spectroscopy, evaluate its corrosion inhibition performance on steel in 0.5 M HCl solution at varying concentrations (25–100 mg/L) and temperatures (303 to 333 K). Computational modelling, including Density Functional Theory, Monte Carlo, and Molecular Dynamics simulations, provides atomic-scale insights into the mechanisms of inhibition. The synthesis, characterisation, and corrosion prevention performance of a novel supramolecular complex, β-cyclodextrin/melamine (β-CD/ME), on St20 steel, in acidic conditions, were the subjects of an inventive investigation that was described in this publication. The complex’s structural alterations, physical interactions, and structure were effectively disclosed, using Raman spectroscopy, 1H NMR, and FT-IR. The β-CD/ME complex’s ability to prevent corrosion in hostile solutions exceeded 92–94%, resulting in the formation of a thin protective film on the metal surface and acting as a mixed-type inhibitor. A novel mix of theoretical and experimental methods is used in this work to comprehend the underlying mechanisms, including the influence of structural factors on corrosion prevention effectiveness and the adsorption energies of the complex on the metal surface. Electrochemical tests

关键词： Molecular dynamics

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Two-Dimensional Magnetic Exciton Polariton with Strongly Coupled Atomic and Photonic Anisotropies

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Physical Review Letters 2024年第26期133卷 266901-266901页

作者： Qiuyang Li Xin Xie Adam Alfrey Christiano W. Beach Nicholas McLellan Yang Lu Jiaqi Hu Wenhao Liu Nikhil Dhale Department of Physics University of Michigan Ann Arbor Michigan 48109 USA Applied Physics Program University of Michigan Ann Arbor Michigan 48109 USA Department of Electrical Engineering and Computer Science University of Michigan Ann Arbor Michigan 48109 USA Department of Physics The University of Texas at Dallas Richardson Texas 75080 USA

Anisotropy is a fundamental property of both material and photonic systems. The interplay between material and photonic anisotropies, however, has hardly been explored due to the vastly different length scales. Here we demonstrate exciton polaritons in a 2D antiferromagnet, CrSBr, coupled with an anisotropic photonic crystal cavity, where the spin, atomic, and photonic anisotropies are strongly correlated. Atomic anisotropy led to exceptionally strong coupling between anisotropic exciton and optical modes, which are stable against excitation densities a few orders of magnitude higher than polaritons in isotropic materials. The resulting polaritons feature anisotropic polarizations determined by the interplay of not only the anisotropies but also the dissipations and coupling of both exciton and photon modes, tunable by tens of degrees via many parameters. The work provides insights of excitons in CrSBr and demonstrates a prototype where atomic- and photonic-scale orders strongly couple, giving rise to unconventional properties in quantum materials and photonic devices.

关键词： Atoms

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Nonreciprocal scintillation using one-dimensional magneto-optical photonic crystals

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Physical Review applied 2024年第5期22卷 054062-054062页

作者： Olivia Y. Long Simo Pajovic Charles Roques-Carmes Yoichiro Tsurimaki Nicholas Rivera Marin Soljačić Svetlana V. Boriskina Shanhui Fan Department of Applied Physics Stanford University Stanford California 94305 USA Department of Mechanical Engineering Massachusetts Institute of Technology Cambridge Massachusetts 02139 USA E. L. Ginzton Laboratory and Department of Electrical Engineering Stanford University Stanford California 94305 USA Department of Physics Harvard University Cambridge Massachusetts 02138 USA Department of Physics Massachusetts Institute of Technology Cambridge Massachusetts 02139 USA

Scintillation describes the conversion of high-energy particles into light in transparent media and finds diverse applications such as high-energy particle detection and industrial and medical imaging. This process operates on multiple timescales, with the final radiative step consisting of spontaneous emission, which can be modeled within the framework of quasiequilibrium fluctuational electrodynamics. Scintillation can therefore be controlled and enhanced via nanophotonic effects, which has been proposed and experimentally demonstrated. Such designs have thus far obeyed Lorentz reciprocity, meaning there is a direct equivalence between scintillation emission and absorption by the scintillator. However, scintillators that do not obey Lorentz reciprocity have not been explored, even though they represent an alternative platform for probing emission, which is both nonequilibrium and nonreciprocal in nature. In this work, we propose to harness nonreciprocity to achieve directional control of scintillation emission, granting an additional degree of control over scintillation. Such directionality of light output is useful in improving collection efficiencies along the directions where detectors are located. We present the design of a nonreciprocal scintillator using a one-dimensional magnetophotonic crystal in the Voigt configuration. Our work demonstrates the potential of controlling nonequilibrium such as scintillation by breaking reciprocity and expands the space of nanophotonic design for achieving such control.

关键词： Magneto-optics Non-reciprocal propagation Photonic crystals Spontaneous emission X-ray beams & optics Metamaterials Medical imaging Scintillators

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Good plasmons in a bad metal

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Science (New York, N.Y.) 2025年第6735期387卷 786-791页

作者： Ruta, Francesco L. Shao, Yinming Acharya, Swagata Mu, Anqi Jo, Na Hyun Ryu, Sae Hee Balatsky, Daria Su, Yifan Pashov, Dimitar Kim, Brian S Y Katsnelson, Mikhail I. Analytis, James G. Rotenberg, Eli Millis, Andrew J. van Schilfgaarde, Mark Basov, D.N. Department of Physics Columbia University New York NY USA Department of Applied Physics and Applied Mathematics Columbia University New York NY USA National Renewable Energy Laboratory Golden CO United States Advanced Light Source E.O. Lawrence Berkeley National Laboratory Berkeley CA United States Department of Physics University of Michigan Ann Arbor MI United States Department of Chemistry University of California Berkeley CA United States Department of Physics University of California Berkeley CA United States Theory and Simulation of Condensed Matter King's College London London United Kingdom Department of Mechanical Engineering Columbia University New York NY USA Institute for Molecules and Materials Radboud University Nijmegen Netherlands CIFAR Quantum Materials Toronto ON Canada Kavli Energy Nanoscience Institute Berkeley CA United States Center for Computational Quantum Physics Flatiron Institute New York NY USA Department of Physics University of Colorado Boulder CO United States

Correlated metals may exhibit unusually high resistivity that increases linearly in temperature, breaking through the Mott-Ioffe-Regel bound, above which coherent quasiparticles are destroyed. The fate of collective charge excitations, or plasmons, in these systems is a subject of debate. Several studies have suggested that plasmons are overdamped, whereas other studies have detected propagating plasmons. In this work, we present direct nano-optical images of low-loss hyperbolic plasmon polaritons (HPPs) in the correlated van der Waals metal MoOCl2. HPPs are plasmon-photon modes that waveguide through extremely anisotropic media and are remarkably long-lived in MoOCl2. Photoemission data presented here reveal a highly anisotropic Fermi surface, reconstructed and made partly incoherent, likely through electronic interactions as explained by many-body theory. HPPs remain long-lived despite this, revealing previously unseen imprints of many-body effects on plasmonic collective modes.

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Effective Force Stabilising Technique for the Immersed Boundary Method

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Communications in Computational physics 2023年第1期33卷 349-366页

作者： Arnab Ghosh Alessandro Gabbana Herman Wijshoff Federico Toschi Department of Applied Physics and Science Education Eindhoven University of TechnologyPO Box 5135600 MB EindhovenThe Netherlands Department of Mechanical Engineering Eindhoven University of TechnologyP.O.Box 5135600 MB EindhovenThe Netherlands Canon Production Printing Netherlands B.V. P.O.Box 1015900 MA VenloThe Netherlands

The immersed boundary method has emerged as an efficient approach for the simulation of finite-sized solid particles in complex fluid ***,one of the well known shortcomings of the method is the limited support for the simulation of light particles,*** with a density lower than that of the surrounding fluid,both in terms of accuracy and numerical *** a broad literature exists,with several authors reporting different approaches for improving the stability of the method,most of these attempts introduce extra complexities and are very costly from a computational point of *** this work,we introduce an effective force stabilizing technique,allowing to extend the stability range of the method by filtering spurious oscillations arising when dealing with light-particles,pushing down the particle-to-fluid density ratio as low as *** thoroughly validate the method comparing with both experimental and numerical data available in literature.

关键词： Immersed boundary method lattice Boltzmann method light particle force stabilization added mass effect

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