Ultra-compact electro-optic phase modulator based on a lithium niobate topological slow light waveguide.

Electro-optic modulators (EOMs) are essential devices of optical communications and quantum computing systems. In particular, ultra-compact EOMs are necessary for highly integrated photonic chips. Thin film lithium niobate materials are a promising platform for designing highly efficient EOMs.

Switchable broadband metamaterial absorber/reflector based on vanadium dioxide rings.

A new broadband tunable metamaterial absorber based on different radii of vanadium dioxide () rings loaded on the dielectric layer is designed. According to the insulator-to-metal phase transition characteristics of under thermal excitation, the dynamic adjustment of the absorption by the external temperature is achieved. The simulation results demonstrate that when is in its metal phase at high temperature, an absorption greater than 90% in the bandwidth range of 2.

[Simulation model of the development stages of flue-cured tobacco based on physiological development period and growing degree days].

Based on the 2010-2011 experimental data of planting flue-cured tobacco in its representative production counties of Yunnan Province, Southwest China, the models of the tobacco plant physiological development period and growing degree days were established, and validated by the observation data from local agro-meteorological stations. The two models had good performance at pre-transplanting stage, and the errors of the estimated dates were smaller. After transplanting stage, the errors of the estimated dates were larger, because of the disturbances from farming activities such as transplanting and topping.