We report the observation of almost perfect light tunneling inhibition at the edge and inside laser-written waveguide arrays due to band collapse. When the refractive index of the guiding channels is harmonically modulated along the propagation direction and out-of-phase in adjacent guides, light is trapped in the excited waveguide over a long distance due to resonances. The phenomenon can be u...

We investigated experimentally and theoretically an invertible fiber-type transformation from a photonic bandgap fiber into a nonideal waveguide and then into an index-guiding photonic crystal fiber via the thermo-optic effect of the fluid filled in the air holes. Such a transformation could be used to develop an in-fiber optical switch/attenuator with a high-extinction ratio of more than 35 dB...

A method to probe the guiding characteristics of waveguides formed in real-time is proposed and evaluated. It is based on the analysis of the time dependent light distribution observed at the exit face of the waveguide while progressively altering its index profile and probed by a large diameter optical beam. A beam propagation method is used to model the observed dynamics. The technique is app...

This paper describes how the guiding capabilities of a virtual agent with a belief – desire – intention cognitive architecture can be enhanced by adding an episodic memory. We describe how the theories of episodic memory and event segmentation can be applied to the architecture of our virtual agent Max, and how to create an index according to the event indexing model. Having memories of past ex...

In this paper we show how software architectural styles can be used to guide object-oriented design. Design guidance is important as the initial phases of software design signiicantly impact software quality. We use two diierent architectural styles to guide the design process from a formal speciication to a design. Software architectural styles assist by providing a diierent level of reuse tha...

We propose the design of a novel and highly efficient all-dielectric, three-waveguide polarization splitter based on the phenomenon of resonant tunneling. By considering a glass waveguide structure with an intermediate high-index guiding layer (such as silicon), we show that one can obtain extinction ratios better than -30 dB in both the outer waveguides at a particular thickness of the high-in...

Accountability reforms have led to a bewildering array of public school performance measures. Policy makers, parents, and the public would often like to use this information to rank schools by differing degrees of effectiveness. Combining measures from different performance dimensions into a single index should be done in such a way that the resulting index is fair to each school, gives each sc...