Chinese Optics Letters, Vol. 7, Issue 3, 03231 (2009)
Photonic bands, gap maps, and intrinsic losses in three-component 2D photonic crystal slabs
Hongjun Shen, Huiping Tian, and Yuefeng Ji
- Key Laboratory of Optical Communication and Lightwave Technologies, Ministry of Education, School of Telecommunication Engineering, Beijing University of Posts and Telecommunications, Beijing 1008762 School of Physics and Electrical Information Science of Ningxia University, Yinchuan 750021
We obtain the photonic bands and intrinsic losses for the triangular lattice three-component two-dimensional (2D) photonic crystal (PhC) slabs by expanding the electromagnetic field on the basis of waveguide modes of an effective homogeneous waveguide. The introduction of the third component into the 2D PhC slabs influences the photonic band structure and the intrinsic losses of the system. We examine the dependences of the band gap width and gap edge position on the interlayer dielectric constant and interlayer thickness. It is found that the gap edges shift to lower frequencies and the intrinsic losses of each band decrease with the increasing interlayer thickness or dielectric constant. During the design of the real PhC system, the effect of unintentional native oxide surface layer on the optical properties of 2D PhC slabs has to be taken into consideration. At the same time, intentional oxidization of macroporous PhC structure can be utilized to optimize the design.