关键词：集成光电子；光栅；HCG
摘 要：This dissertation is devoted to investigate the physical origins of the extraordinary features of HCG, and explore its applications in novel devices for integrated optoelectronics. An intuitive picture will be presented to explain the HCG physics. The essence of HCG lies in its superb manipulation of light, which can be coupled to applications in light generation and detection.This breadth of functionality of HCG suggests that HCG has reached beyond a single element in integrated optoelectronics; it has enabled a new platform for integrated optoelectronics.