فهرست مقالات band gap diagram دسترسی آزاد مقاله صفحه چکیده متن کامل 1 - Investigating the Properties of an Optical Waveguide Based on Photonic Crystal with Point Defect and Lattice Constant Perturbation Khojasteh Zarei Ghahraman Solookinejad Masoud Jabbari