量子阱光电子开关器件(一)

量子阱半导体结构可使诸如光调制器和开关等光电子器件做得更小、更快、效率更高。它所具有的逻辑特性使其在并行高速互连的电子集成电路的集成度上具有良好的潜力。光电子器件能采用波导,也能采用二维并行阵列制作。其集成规模可达2048个单元,可工作的光逻辑和存贮器件的阵列得以实现及运行,所有单元都可由自由空间光(free-space optics)进行外部并行访问。本文概述了量子阱器件的运行机理及其发展前景。

QUANTUM WELL OPTOELECTRONIC SWITCHING DEVICES

Quantum well semiconductor devices are a new type of optoelectronic devices based on quantum well physical mechanism, and having the main advantages of small size, high speed and low power dissipation. Because of their good potential for integration with electronic integrated circuits, the devices have great practical values in very complicated integrated circuits for parallel high speed interconnection. Quantum well optoelectronic devices such as optical modulators and switches can be made both in waveguides and two-dimensional parallel arrays. The arrays of optical logic and memory devices have been made up to 2048 elements, all externally accessible in parallel with free-space optics. This paper overviews the physics underlying the operation of such devices, and describes the principles of several of the devices types, including Quantum-Confined Stark Effect Modulators(QCSE) and Self-Electrooptic Effect Devices (SEED). At the end of the paper, the prospect of the technical development in this field is also given.