Investigation of the terahertz emission characteristics of MBE-grown GaAs-based nanostructures Por Takatori, Satoru, Minh, Pham Hong, Estacio, Elmer, Cadatal-Raduban, Marilou, Nakazato, Tomoharu, Shimizu, Toshihiko, Bailon-Somintac, Michelle, Somintac, Armando, Defensor, Michael, Gabayno, Jacqueline, Awitan, Fritz Christian B., Jaculbia, Rafael B., Garcia, Alipio, Ponseca, Carlito Jr, Salvador, Arnel