Ultra-stable nano-manipulation of mechanically-variable system : optical forces and beyond

Optical force and acoustic force have been intensively investigated over the past several decades in the applications ranging from the optical/acoustic trapping, high-resolution biomedical imaging, sensing technology, signal processing to acoustic levitation, ultrasonic calibration, etc. I started from the calculation of the optical force including both radiation pressure and electrostriction force in stimulated Brillouin scattering using finite-element method. Then I investigated the sufficient condition of creating conservative optical force field, which is hard to realize as the optical force generally contains inevitable rotational component in a multi-port system. To verify the conclusion, this condition has been subsequently applied to three scenarios, realizing auto-alignment of millimeter-scale photonic crystal slabs, simultaneously trapping and orientating nano-particles, and self-aligned topological photonic crystal. To overcome the material loss which breaks the conservativeness of the optical force, a compensating method using the gain media to recover the conservative optical force field is presented and verified by the vorticity ratio derived from Helmholtz-Hodge decomposition (HHD). As an analog to the optical radiation pressure but generally millions larger in magnitude, the acoustic radiation pressure calculation using the response theory is also proposed, which perfectly agrees with the traditional Reynold stress tensor integration and, more importantly, reveals the sufficient condition of conservative acoustic force. The contributions of this work are significant in four aspects in the area of numerical device simulation and parallel scientific computing: first of all, it paves the fundamental way to ultra-stable trapping by providing correct ways of numerically calculating optical/acoustic forces, which are corroborated by response theory developed in this work; secondly, the complete temporal coupled-mode theory unveils all spectral response of waveguide-resonator systems; thirdly, the parallel algorithm of HHD applied to periodic structure provides reliable metric to evaluate stability of trapping; finally, the newly developed weak-form formulation of topological photonic crystal with loss/gain helps design of novel photonic devices.Electrical and Computer Engineerin

Software for Exascale Computing - SPPEXA 2016-2019

This open access book summarizes the research done and results obtained in the second funding phase of the Priority Program 1648 "Software for Exascale Computing" (SPPEXA) of the German Research Foundation (DFG) presented at the SPPEXA Symposium in Dresden during October 21-23, 2019. In that respect, it both represents a continuation of Vol. 113 in Springer’s series Lecture Notes in Computational Science and Engineering, the corresponding report of SPPEXA’s first funding phase, and provides an overview of SPPEXA’s contributions towards exascale computing in today's sumpercomputer technology. The individual chapters address one or more of the research directions (1) computational algorithms, (2) system software, (3) application software, (4) data management and exploration, (5) programming, and (6) software tools. The book has an interdisciplinary appeal: scholars from computational sub-fields in computer science, mathematics, physics, or engineering will find it of particular interest

Wireless Microwave Quantum Communication

228 p.Esta Tesis explora los límites en la aplicación de microondas cuánticas propagantes para comunicación y sensórica cuántica, así como el diseño de nuevos aparatos y protocolos para combatir estas limitaciones.Nos servimos de estados cuánticos Gaussianos para teleportación cuántica e iluminación cuántica, y estudiamos cómo mejorar estos protocolos utilizando destilación de entrelazamiento y purificación parcial, respectivamente. La Tesis se centra en la distribución de entrelazamiento por el aire, y sigue los pasos de generación de estados dentro de un criostato, adaptación de impedancias entre el criostato y elaire con una nueva generación de antenas coplanares, y propagación por el aire, en el marco actual de las tecnologías de microondas. También tratamos las dificultades producidas por pérdidas y medidas ineficientes, y exploramos una extensión hacia comunicación cuántica entre satélites, donde analizamos los efectos de la difracción y las turbulencias, especialmente cómo estas últimas afectan a las señales en el rango óptico. Concluimos con el estudio de la teleportación de información cuántica en una red de área local cuántica. En resumen, esta Tesis contribuye al desarrollo de la comunicación inalámbrica con microondas en el régimen de microondas, estudiando sus limitaciones y cómo vencerlas. Aun así, aún se trata de una tecnología emergente, y queda mucho trabajo por hacer para que llegue a ser competitiva

Proceedings of the 2018 Canadian Society for Mechanical Engineering (CSME) International Congress

Published proceedings of the 2018 Canadian Society for Mechanical Engineering (CSME) International Congress, hosted by York University, 27-30 May 2018

Large space structures and systems in the space station era: A bibliography with indexes

Bibliographies and abstracts are listed for 1372 reports, articles, and other documents introduced into the NASA scientific and technical information system between January 1, 1990 and June 30, 1990. Its purpose is to provide helpful information to the researcher, manager, and designer in technology development and mission design according to system, interactive analysis and design, structural and thermal analysis and design, structural concepts and control systems, electronics, advanced materials, assembly concepts, propulsion, and solar power satellite systems