Surface-Emitting Second-Harmonic Generation and Nonlinear Optical Devices Using Semiconductor Asymmetric Quantum Well Structures (SGER)

9406921丁，提出了一种在非对称量子阱构成的波导中倍频红外激光表面发射绿光的光源。准相位匹配是通过生长多个非对称量子阱单元来实现的，每个非对称量子阱单元由两个区域组成，分别对应于“左”和“右”对称，从而调制沿生长方向的二阶极化率。转换效率可以大于1%/W。主要研究人员建议随后实现基于非对称量子阱表面发射二次谐波产生的微型可积相关器、光谱仪和鉴相器。这些器件最终可以用于光通信和超快探测。***

9406921 Ding A source of surface-emitting green light by frequency-doubling infrared laser beam in the waveguide consisting of asymmetric quantum wells is proposed. Quasi-phasematching is achieved by growing many units of asymmetric quantum wells, each of which is composed of two domains of multiple asymmetric quantum wells corresponding to "left" and "right" symmetries, and therefore, modulating second-order susceptibility along the growth direction. The conversion efficiency can be larger than 1%/W. The principal investigator proposes to subsequently implement miniature and integrable correlators, spectrometers, and phase detectors, based on the surface-emitting second-harmonic generation using asymmetric quantum wells. These devices can be eventually used in optical communications and ultrafast detection. ***