1. Jijun Feng, Ryoichi Akimoto, Shin-ichiro Gozu, Teruo Mozume, Toshifumi Hasama, and Hiroshi Ishikawa, “Bandgap control for intersubband transition in InGaAs/AlAsSb coupled double quantum wells”, IEEE Photon. Technol. Lett. 25, 1474-1477 (2013).

2. Jijun Feng, Ryoichi Akimoto, Shin-ichiro Gozu, Teruo Mozume, Toshifumi Hasama, and Hiroshi Ishikawa, “Band edge tailoring of InGaAs/AlAsSb coupleddouble quantum wells for a monolithicallyintegrated all-optical switch”, Optics Express 21, 15840-15846 (2013).

3. Jijun Feng, Ryoichi Akimoto, Shin-ichiro Gozu, Teruo Mozume, Toshifumi Hasama, and Hiroshi Ishikawa, “Ultrafast all-optical switch with cross-phasemodulation by area-selective ion implantation inInGaAs/AlAsSb coupled double quantum wells”, Optics Express 20, B279-B287 (2012).