"Moataz Eissa,Ryuya Sasaki,Tsuyoshi Horikawa,Tomohiro Amemiya,Nobuhiko Nishiyama","Wafer- and chip-level characterization of photonic integrated circuits by cascaded grating-couplers and spot-size converters","IEICE Society Conference",,,,,,2023,Sept. "R. Sasaki,T. Katsuyama,Y. Oiso,T. Kikuchi,Moataz Eissa,T. Amemiya1,N. Nishiyama","A study of the effect of misalignment between III-V/Si waveguides in direct bonding GaInAsP/SOI optical devices","The Institute of Electronics, Information and Communication Engineers",,,,,,2023,Sept. "Moataz Eissa,Takehiko Kikuchi,Yoshitaka Ohiso,Tomohiro Amemiya,Nobuhiko Nishiyama","Low-thermal-resistance GaInAsP/SOI ridge-waveguide hybrid lasers","2023年電子情報通信学会総合大会",,,,,,2023,Mar. "Shaher Anis Mahmoud Eissa Moataz,Takehiko Kikuchi,Yoshitaka Oiso,Tomohiro Amemiya,Nobuhiko Nishiyama","High thermal performance hybrid GaInAsP/SOI ridge waveguide lasers with enhanced heat dissipation structure",,"Japanese Journal of Applied Physics",,"vol. 62","no. 1","pp. 010905",2023,Jan.