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Arbitrary power splitting ratio is obtained by an 1-to-2 asymmetric multimode interference splitter. The dimension of the multimode section is less than 1.5μm × 3цm while the excess loss is lower than 0.15 dB.
An enhanced ant colony optimization algorithm is proposed. The search deadlock is ruled out through modifying both initial environment pheromone and state transition probability. The roundabout of trajectory is improved by combining deterministic search with stochastic search. Experimental results show that the new algorithm can provide desirable safety path under the complex situation, which contains...
The slab-thickness dependence of the photonic bandgap in air-bridge photonic-crystal slabs was theoretically investigated by the 3-D plane-wave expansion method. The photonic bandgap was found to achieve a maximum for a certain slab thickness depending on air-hole volume filling factor. A kink in the photonic bandgap width versus slab thicknesses was observed, and found to be due to a transition in...
Localization is very important for the applications in wireless sensor network. For the disadvantage that the accuracy of traditional DV-Hop algorithm is low, this paper proposes an improved DV-Hop localization algorithm named NDV-Hop (Novel improved DV-Hop algorithm). NDV-Hop takes some improvements over DV-Hop from the following aspects: firstly, average hop distance is calculated by taking all...
A new national laboratory for optoelectronics located in Wuhan, China is introduced and its collaboration model with Georgia Tech is outlined. Their joint effort is establishing an international platform for scholars from the world to do research and education on new frontiers of photonics and electronics.
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