Anti-parity-time topologically undefined state

Researches on the topological edge state in the photonic lattice are attracting considerable attention. Here, we report the studies on a particular state for which the topological invariant is undefined. We constructed an anti-parity-time-symmetric photonic lattice by using the perturbation method. Light distributes only in the wide waveguides with equal magnitude for the state with undefined winding numbers. Further studies show that the equal intensity transmission is unaffected except for the defect site. Our work provides a new way to study the topological state and the equally divided light transmission and might be applicable in optical circuits and optical interconnect.

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.