List of Articles Mahdi Bahadoran Article 1 - Butterfly-like phase shift: a novel gauge for critical coupling of add–drop resonator 10.1007/s40094-018-0291-2 Mahdi Bahadoran Preecha Yupapin Journal of Theoretical and Applied Physics , Issue 1 , Year , Spring 2018 Article 2 - Double critical coupled ring resonator-based add–drop filters 10.1007/s40094-019-00343-7 Mahdi Bahadoran Iraj Sadegh Amiri Journal of Theoretical and Applied Physics , Issue 1 , Year , Summer 2019