فهرس المقالات nasrin miri المقاله 1 - Studying Focusing Properties of Graded Index Photonic Crystals Made of Material with Different Refractive Index 20.1001.1.24237361.2017.2.3.6.4 Nasrin Miri Abdolrasoul Gharaati Journal of Optoelectronical Nanostructures , العدد 6 , السنة 2 , پاییز 2017