@article{weko_10535_1, author = "Iguchi,Akito and Morimoto,Keita and Tsuji,Yasuhide", title = "Bidirectional Beam Propagation Method Based on Axi-Symmetric Full-Vectorial Finite Element Method", journal = "IEEE PHOTONICS TECHNOLOGY LETTERS", year = "2021", volume = "33", number = "14", pages = "707--710" }