Related Articles Excitonic diffusion dynamics in ZnO Appl. Phys. Lett. 100, 092106 (2012) Plasmonic reflectors and high-Q nano-cavities based on coupled metal-insulator-metal waveguides AIP Advances 2, 012145 (2012) Resonantly enhanced optical nonlinearity in hybrid semiconductor quantum dot–metal nanoparticle structures Appl. Phys. Lett. 100, 063117 (2012) Graphene induced tunability of the su...

Algebraic-topological criteria for domain coverage, hole-detection, andmapping are given in the context of dynamic multi-agent systems navigating with respect to beacons or landmark visibility. The key constructs involve dual pairs of nerves of the relevant visibility and observation covers, based on a sensing relation, either binary or via distance/signal-strength. This, in turn, is used to co...

Currently, most Software Defined Radio (SDR) related products and researches focus on analog communication and voice transmission. In this paper, we propose a SDR platform with digital data communication capability. This platform consists of Field Programmable Gate Array (FPGA) based radio hardware and open source SDR software modules. The main features include: 1) Radio Spectrum Sensing; 2) Re...

We report on a microwave planar ring antenna specifically designed for optically detected magnetic resonance (ODMR) of nitrogen-vacancy (NV) centers in diamond. It has the resonance frequency at around 2.87 GHz with the bandwidth of 400 MHz, ensuring that ODMR can be observed under external magnetic fields up to 100 G without the need of adjustment of the resonance frequency. It is also spatial...

When perforated metal films are sufficiently thin, in addition to exciting surface plasmon-polariton (SPP) modes by conventional two dimensional grating scattering, there is also the possibility of coupling to the localised modes associated with the holes. Here, experimental transmission spectra are obtained from focused ion beam fabricated hole arrays exhibiting localized modes in the visible ...

In this paper we investigate a novel method to manufacture gratings in optical fiber microwires and discuss their application to sensing. Gratings can be manufactured by wrapping an optical fiber microwire on a microstructured rod. This method avoids post-processing the thin optical fiber microwire and it has great flexibility: chirping can be realized by designing the air hole size and positio...

Structure and morphology of picene films under vacuum and O2 atmosphere were studied by in situ synchrotron X-ray scattering. We observed that picene films exhibit a highly oriented and ordered structure, which is similar to the one reported for picene single crystals. Furthermore, we found that the film structure determined under vacuum remains nearly unchanged under O2 atmosphere. The results...

This article is on the subject of evolving neural network controllers for cooperative, mobile robots. We evolve controllers for combined hole-avoidance and phototaxis in a group of physically connected, autonomous robots called s-bots, each with limited sensing capabilities. We take a systematic approach to finding a suitable fitness function, an appropriate neural network structure, and we exp...

Wireless Sensor Networks have been widely used in many domains, such as scientific explorations, industrial applications etc. Sensor nodes are dedicated to perform functionalities such as relaying, sensing and aggregation, which quickly drain energy of the node. Due to relay traffic, nodes closest to sink tends to deplete energy faster than others due to heavier relay traffic. Thus UnEven energ...

The manipulation of optical waves in the subwavelength scale is limited by diffraction. In the vicinity of a narrow aperture, the amplitude of the electric field is approximately uniform and the transmissivity is extremely low. Here we show that despite these fundamental constraints it may be possible to transport and redirect a complex electromagnetic image through a tiny subwavelength hole wi...