Yuri S. Kivshar

Bio: Yuri S. Kivshar is an academic researcher from Australian National University. The author has contributed to research in topics: Metamaterial & Soliton. The author has an hindex of 126, co-authored 1845 publications receiving 79415 citations. Previous affiliations of Yuri S. Kivshar include Technische Universität Darmstadt & Los Alamos National Laboratory.

Anapole nanolasers for mode-locking and ultrafast pulse generation

Abstract: Nanophotonics is a rapidly developing field of research with many suggestions for a design of nanoantennas, sensors and miniature metadevices Despite many proposals for passive nanophotonic devices, the efficient coupling of light to nanoscale optical structures remains a major challenge In this article, we propose a nanoscale laser based on a tightly confined anapole mode By harnessing the non-radiating nature of the anapole state, we show how to engineer nanolasers based on InGaAs nanodisks as on-chip sources with unique optical properties Leveraging on the near-field character of anapole modes, we demonstrate a spontaneously polarized nanolaser able to couple light into waveguide channels with four orders of magnitude intensity than classical nanolasers, as well as the generation of ultrafast (of 100 fs) pulses via spontaneous mode locking of several anapoles Anapole nanolasers offer an attractive platform for monolithically integrated, silicon photonics sources for advanced and efficient nanoscale circuitry

Magnetoelastic nonlinear metamaterials

Abstract: We introduce the concept of magnetoelastic metamaterials with electromagnetic properties depending on elastic deformation. We predict a strong nonlinear and bistable response of such metamaterials caused by their structural reshaping in response to the applied electromagnetic field. In addition, we demonstrate experimentally the feasibility of the predicted effect.

Solitons in photonic crystals

Abstract: This chapter focuses on solitons forming inside photonic crystals. Photonic crystals can be viewed as an optical analog of semiconductors, in the sense that they modify the propagation characteristics of light just as an atomic lattice modifies the properties of electrons through a bandgap structure. Photonic crystals with embedded nonlinear impurities or made of a nonlinear material are called nonlinear photonic crystals, and they create an ideal environment for the generation and observation of localized modes in the form of solitons. These advantages could be employed to design very small all-opticallogical gates using readily available materials and perhaps combining several thousands of such devices on a chip of a few square centimeters. Such solitons can be viewed as an extension of the concepts of the discrete and gap solitons to two (and even three) spatial dimensions. Moreover, in the case of short pulses propagating inside photonic-crystal waveguides and circuits, the concept of such solitons can be further extended to the temporal domain.

Optical Anapoles: Concepts and Applications

Abstract: The work was supported by the Government of the Russian Federation (Grant 08-08), the Ministry of Science and Higher Education of the Russian Federation (project No. 16.12780.2018/12.2), the Russian Foundation for Basic Research (Grant 18-02-00381), the Australian Research Council, and the Strategic Fund of the Australian National University. The studies on anapole metamaterials were supported by the Russian Science Foundation (project 17-72-10230). B.S.L. also acknowledges support by the Russian Ministry of Education and Science (#14.W03.31.0008).

Corrigendum: Hyperbolic metamaterials

Abstract: Nature Photon. 7, 948–957 (2013); published online 28 November 2013; corrected after print 28 November 2013. In the version of this Review published in print, “Si/Ge (ref. 23)” was listed on the eight line of the second column on the second page (page 949). This should have read “Ag/Ge (ref. 23)”. This error has been corrected in both the HTML and PDF versions of the Review.

I and i

Abstract: There is, I think, something ethereal about i —the square root of minus one. I remember first hearing about it at school. It seemed an odd beast at that time—an intruder hovering on the edge of reality. Usually familiarity dulls this sense of the bizarre, but in the case of i it was the reverse: over the years the sense of its surreal nature intensified. It seemed that it was impossible to write mathematics that described the real world in …

Fast parallel algorithms for short-range molecular dynamics

Abstract: Three parallel algorithms for classical molecular dynamics are presented. The first assigns each processor a fixed subset of atoms; the second assigns each a fixed subset of inter-atomic forces to compute; the third assigns each a fixed spatial region. The algorithms are suitable for molecular dynamics models which can be difficult to parallelize efficiently—those with short-range forces where the neighbors of each atom change rapidly. They can be implemented on any distributed-memory parallel machine which allows for message-passing of data between independently executing processors. The algorithms are tested on a standard Lennard-Jones benchmark problem for system sizes ranging from 500 to 100,000,000 atoms on several parallel supercomputers--the nCUBE 2, Intel iPSC/860 and Paragon, and Cray T3D. Comparing the results to the fastest reported vectorized Cray Y-MP and C90 algorithm shows that the current generation of parallel machines is competitive with conventional vector supercomputers even for small problems. For large problems, the spatial algorithm achieves parallel efficiencies of 90% and a 1840-node Intel Paragon performs up to 165 faster than a single Cray C9O processor. Trade-offs between the three algorithms and guidelines for adapting them to more complex molecular dynamics simulations are also discussed.

疟原虫var基因转换速率变化导致抗原变异[英]／Paul H, Robert P, Christodoulou Z, et al//Proc Natl Acad Sci U S A

Abstract: 抗原变异可使得多种致病微生物易于逃避宿主免疫应答。表达在感染红细胞表面的恶性疟原虫红细胞表面蛋白1（PfPMP1）与感染红细胞、内皮细胞、树突状细胞以及胎盘的单个或多个受体作用，在黏附及免疫逃避中起关键的作用。每个单倍体基因组var基因家族编码约60种成员，通过启动转录不同的var基因变异体为抗原变异提供了分子基础。