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

提出了一种利用非对称量子阱组成的波导中的倍频红外激光束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，每个非对称量子阱由对应于“左”和“右”对称的多个非对称量子阱的两个域组成，因此，沿着生长方向调制二阶磁化率。转换效率可大于1%/W。首席研究员建议随后实现微型和可积相关器，光谱仪和相位检测器，基于使用非对称量子阱产生的表面发射二次谐波。这些器件最终可用于光通信和超快检测。* * *

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. ***