We demonstrate the simultaneous existence of slow photonic and phononic modes in phoxonic nanobeam. The phoxonic nanobeam is formed by arranging air semi-cylinders along lateral sides of a suspended silicon waveguide. Because of the slow group velocities, the acousto-optical interactions are dramatically enhanced. The efficiencies of interaction are strongly related to the polarizations of both slow photonic and phononic modes. Our proposed structure is a potential high-efficiency acousto-optical modulator with ultra-small footprint size. The operating optical wavelength is about 1550 nm, while the acoustic frequency is about 6.8 GHz.
Vehicular wireless communication for real-time or emergent events notification is an important issue in VANETs. In this article we construct an integrated architecture for the implementation of dynamic routing/navigation application in VANET environment using iWCU -a WAVE/DSRC device developed by ITRI 1 of Taiwan. The Dynamic navigation field test in VENET using a WAVE/DSRC On-board-Unit(OBU) and a WAVE/DSRC Road-Side-Unit(RSU) as the network node is examined. OBU provides dynamic navigation service for driver when receiving the real-time traffic information from RSU. The loopback detection method is adopted to detect re-broadcasting packets when a forward request in real-time needed in this study. As result, real-time packets transmission for dynamic navigation application with high mobility situations are delivered efficiently in testing results.(
scite is a Brooklyn-based organization that helps researchers better discover and understand research articles through Smart Citations–citations that display the context of the citation and describe whether the article provides supporting or contrasting evidence. scite is used by students and researchers from around the world and is funded in part by the National Science Foundation and the National Institute on Drug Abuse of the National Institutes of Health.