Topological pumping in acoustic waveguide arrays with hopping modulation

Thouless pumping is the adiabatic transportation of quantized charge, which is regarded as the dynamic version of the quantum Hall effect. Here we propose the design of an acoustic system to demonstrate the topological pumping characterized by transporting acoustic energy from one side to the opposite. The system is composed of coupled acoustic waveguide arrays with modulated coupling along both cross-sections and the propagating direction. We explore multiple topological phases by introducing rich spatial frequency or enlarged range of the hopping modulation. Such distinct topological phases are evidenced by adiabatic evolution of the edge states, where the acoustic system varies continuously and slowly along the state propagating direction. The robustness behavior of the edge states transport is also verified with numerical simulations to imply their topology origin. Our work provides a route to realize topological phases and utilize the corresponding edge states in waveguide arrays that can lead to versatile acoustic wave manipulation applications.

CPB High-Speed Optical Data Buses for Microprocessor Systems

Рассмотрены вопросы формирования оптического интерконнекта между СБИС на печатных платах с использованием фторсодержащих полимерных материалов. Обсуждаются различные аспекты технологии УФ-фотолитографии для создания полимерных волноводов. Приводятся результаты исследований, направленных на формирование высокоскоростной оптической шины передачи данных для микропроцессорных вычислительных систем (суперЭВМ) с использованием массивов полимерных волноводов на печатной плате. The study deals with the optical interconnect between VLSIs on a PCB with fluorine-containing polymers. Various aspects of the UF photolithography for making polymer waveguides are discussed. The results of the research aimed at making a highspeed optical data bus for SoC (supercomputers) with PCB polymer waveguide arrays.