Resonant Diffraction in Semi-Insulating Multiple Quantum

该方案的目的是结合光折变半导体中全息图像处理的优点，利用量子受限激子实现电光特性的共振增强。这一目标将导致首次系统地研究半绝缘多量子阱及其在图像处理中的应用。光折变衍射的显著共振增强是可能的。半导体已经具备了器件速度快的优势。量子井必须是半绝缘的，才能实现电场的空间调制。在这项拟议的研究中，通过分子束外延生长多量子阱结构，并通过离子注入使其成为半绝缘结构。量子阱基本吸收附近波长的差动透过率将被测量为交变电场。应用于量子井中。利用两个相干的、低功率的、可以通过基波吸收连续转动的连续激光光束。这项研究具有重要意义，因为它将产生分辨率仅受衍射限制的图像处理设备，是光学寻址和控制的，并且需要非常小的操作能量。

The objective of this proposal is to combine the advantages of holographic image processing in photorefractive semiconductors, with the resonant enhancement of electro- optic properties using quantum- confined excitons. This objective will result in the first systematic study of semi-insulating multiple quantum wells and their application to image processing. Significant resonant enhancement of photorefractive diffraction is possible. Semiconductor already have the advantage of fast device speed. The quantum wells must be semi-insulting to allow spatial modulation of electric fields. In the proposed research, multiple quantum well structures will be grown by molecular beam epitaxy and will be made semi-insulating by ion implantation. The differential transmission of wavelengths that are near the fundamental absorption of the quantum wells will be measured as an alternating electric field is applied across the quantum wells. Holographic gratings will be imposed on the wells using the interference of two coherent, low-power, cw laser beams that can be turned continuously through the fundamental absorption. The research has significance because it will yield image processing devices that are limited in resolution only by diffraction, are optically addressed and controlled, and require very small operation energies.