کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
1537234 | 996583 | 2011 | 5 صفحه PDF | دانلود رایگان |
![عکس صفحه اول مقاله: Broad multilayer antireflection coating by apodized and chirped photonic crystal Broad multilayer antireflection coating by apodized and chirped photonic crystal](/preview/png/1537234.png)
In this work, a new examination had been carried out to create a multilayer which acts as an antireflection coating. It has been shown that applying an apodization to a one dimensional photonic crystal can significantly enhance the total optical transmission in the structure. The transmission characteristics of the apodized grating are analyzed. So, in order to achieve a wideband of total transmission, the number of layers and the apodization profile should be optimized. Then, chirping was introduced to the apodized structure to improve the system transmission. The structure was investigated numerically according to its number of layers. Through accurate control of the design parameters, reflectance can achieve a value less than 0.05% across a large range of wavelengths. The enhancement of optical transmission in this structure is very important since the performance of a number of optical devices could be improved.
Journal: Optics Communications - Volume 284, Issue 18, 15 August 2011, Pages 4124–4128