Laser and infrared compatible stealth from near to far infrared bands by doped photonic crystal

Xuanke Zhao, Qingwu Zhao, Lianfen Wang
2011 Procedia Engineering  
Photonic crystals can realize broadband thermal infrared stealth based on its high-reflection photon forbidden band. By forming a "hole-digging" reflection spectrum of doped photonic crystals at military laser wavelength of 1.06μm and 10.6μm, compatible stealth of laser and infrared can be achieved. We selected lead telluride (PbTe) and cryolite (Na 3 AlF 6 ), and designed a one-dimensional two-defect-mode photonic crystal based on principles of distributed Bragg reflector micro-cavity. The
more » ... cro-cavity. The reflection and transmission spectra of the photonic crystals were calculated by transfer matrix method of thin-film optical theory. The calculation results show that the designed multi-cycle dualhetero-junction photonic crystal has a high spectral reflectance in the near, middle and far infrared band, whose spectral reflectance is greater than 99% in 1~5µm and 8~14µm infrared bands, and spectral transmittance at 1.06μm and 10.6μm is greater than 96%. This will satisfy the laser and infrared compatible stealth in the near, middle and far infrared bands
doi:10.1016/j.proeng.2011.08.311 fatcat:gub6fzxmzfemjp2csgzw44cnsq