日本筑波大学物理系首次开发了新的超高速光开关。它必须满足高灵敏度,超高速和转换快3个条件。利用Ⅰ型半导体多量子阱(MQW)和圆偏振光的新结构,在室温下分别实现1ps以下的高速响应,100GHz以上的高速转换,3nJcm~2以下的高灵敏度,利用以上这些条件新研究的光开关作为将来的 The University of Tsukuba, Japan Department of Physics for the first time developed a new ultra-high speed optical switch. It has to satisfy the three conditions of high sensitivity, very high speed and fast conversion. Based on the new structure of MQW and circularly polarized light, the high-speed response of 1ps or less, the high-speed conversion of 100GHz or more and the high sensitivity of 3nJcm-2 are achieved respectively at room temperature. Optical switch as future