%0 Journal Article
%T Designing High Reflectivity Omnidirectional Coating of Mirrors for Near Infrared Spectrum (700-2500 nm)
%A Shireen Mohammed Abed
%A Saeed Naif Turki Al-Rashid
%J Applied Physics Research
%D 2013
%I 
%R 10.5539/apr.v5n1p102
%X In this paper, a high reflection coating is designed depending on the variable of refractive indices for NIR spectral region (700-2500 nm) by the use of the computer program MATLAB version 7. We could find the reflective 99.62% for seven layers at the incident angels (90กใ, 40กใ) in the wavelength (1064 nm) for coatings (Si, MgF2), substrata BK7 (relatively hard borosilicate crown glass with high homogeneity), which is used for laser application such as the ND:YAG laser (1060 nm), and R=98.37% for coatings (SbSe, Na3AIF6) and substrata glass for eleven layers at ?=90กใ which covers the wavelength from (955.6 nm) to (1622 nm) and represents the complete range for optical telecommunication band (short (S) 1460-1530 nm, conventional (C) 1530-1560 nm and long (l)1560-1620 nm). The results show that the reflectivity of the stack increases with the number of layers in the stack, the best layer number is nine which has a reflective of 99.62% at (1060 nm), as shown in Figure 4a. Also the reflective changes with incident angel; the best angel is (40กใ) which gives the convergent reflective for electric and magnetic polarization 99.91% and 99.36%, respectively for the wavelength (1060 nm).
%U http://www.ccsenet.org/journal/index.php/apr/article/view/23973