List of Articles FDTD method Open Access Article Abstract Page Full-Text 1 - A Novel Structure for Optical Channel Drop Filter using Two-Dimensional Photonic Crystals with Square Lattice aram khoshtinat Mohammad Ghiamy Open Access Article Abstract Page Full-Text 2 - The New Method for Optical Channel Drop Filter with High Quality ابولفضل اسدپور حامد علیپور بنایی علیرضا عندلیب