high-index-contrast

According to the characteristics of high-index-contrast sub-wavelength grating(HCG),we calculate the reflectivity and bandwidth of HCG via rigorous coupled-wave analysis method.The results indicate that HCG has a high reflectivity,that is 0.99 and a wide Lacoste Polo Shirts reflective bandwidth,that is△λ/λ≈32%.3.We design HCG to be used as reflector of Resonant-Cavity-Enhanced (RCE) photodetector.Long-wavelength material InP is selected to calculate the quantum discount wedding dresses efficiency.The result indicates that RCE photodetector integrated with lace wedding dresses has an excellent performance of quantum efficiency,that can reach 99%.4.Two different programs to achieve an arc absorption microstructure are proposed and studied in experiment.One is realized by air-gap technique,in which one of epitaxy layers is etched by selective chemical wet etching chi flat iron store techniques.With the air-gap,the cantilever will bend for the tangential stress and an arc absorption cavity is obtained. The radiuses of the fabricated arc microstructures are 72μm,286μm, blog new shirts 2010 and 1143μm.The other arc microstructure is realized by dynamic etch mask technique.With this technique,the angle range of arc microstructure can be controlled by varying the initial and the final concentration of solutions,and the radius of arc microstructure can be controlled by varying the time of titration.
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