Diyala Journal For Pure Science
Scientific Refereed Journal Published By College of Science - University of Diyala
Forgotten my password !
Diyala Journal For Pure Sciences DJPS
ISRA Impact Factor:3.715
P- ISSN:2222-8373, E-ISSN:2518-9255
Volume 13, Issue 2, Part 1 , April. 2017
Multiple Cavity Square Narrow and Broad Band Optical Filters for Infrared Region Application
Shireen Mohammed Abed
Year: 2017, Volume: 13, Issue: 2, Part: 1
Pages: 102-115, DOI: http://dx.doi.org/10.24237/djps.1302.175A
In this work, theoretically optimization design of wide and narrow band pass filters have been suggested within middle- infrared region (MIR) that ranged from 9000 nm to 12000 nm. For the numerical calculation, use Germanium (Ge) as the substrate, Zinc sulfide (ZnS) and Cryolite (Na3A1F6) as high and low refractive index respectively. The results shows that, for normal incidence yields the transmittance is high ( T ˃ 99.5 ) at the center of Design wavelength (λo). Also, when the angle of incidence increase, The transmittance of electric polarization decreases and that of magnetic polarization increases , As in the case for the proposed design: Air/(LH)4LHHL(HL)4H(LH)4LHHL(HL)4(HL)4(HL)4HH(LH)4 (LH)4/Ge (TE=96.79) and (TM=99.57) at the angle 30 .
Keywords : Transmittance , Filter, Coating, Oblique incidence.