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We discover robust three-dimensional generalized Dirac points — linear four-fold point degeneracies — in a non-symmorphic photonic crystal realizable at near-infrared wavelengths. The surface states exhibit gapless line-nodes characterized by a Z2 topological invariant.
This brief presents a novel sense amplifier with an enhanced current sensing method for embedded flash memories, capable of operating at a voltage as low as 1.2 V. A dynamic bit-line clamping circuit and a novel reference voltage generation circuit are also employed to improve the precharge speed and sensing window under low power supply voltage. The sense amplifier was implemented in a flash realized...
This article presents a novel researched method for investigating the cognitive processes of children. This study designed an activity to observe characteristics of cognitive process. In the activity, children were asked to engage in thinking and using scientific concept to draw as many as possible optical paths between the laser gun and target. There were 95 fifth graders participate in this study...
This presentation will discuss the use of photonic crystal heterostructure resonant cavities in microcavity lasers. The discussion of the experimental work will focus on the use of intermixing to reduce the optical losses in the photonic crystal mirrors, the demonstration of larger output powers, and an investigation of gain compression. The theoretical discussion will focus on cavity spectroscopy,...
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