Extremely Nondegenerate (END) Photonic Devices

该计划的目标是将直接带隙半导体中观察到的使用极端非简并(结束)频率的双光子吸收(2PA)增加2-3个数量级转化为光电子器件技术。在拟议的研究中，这一新发现将探索光学检测和开关的全新设备想法。这项研究具有变革性，因为增强型2PA提高了性能，使之成为可能的设备类型是新的和独特的。End 2PA极大地降低了此类设备所需的辐照度。2PA的巨大增强和非线性折射的结合为光子器件开辟了一个新的可能性领域。智能上的优点是，将端部非线性用于光子器件应用允许大幅降低非线性光学器件所需的辐照度。这开辟了基于2PA的设备的新领域，并为改进现有的基于双光子的设备提供了巨大的潜力。这项研究将有助于确定这些类型的非线性光子器件的极限。更广泛的影响是，除了资助两名博士生的培训，他们将受益于CREOL严格的光学和光子学研究生课程，终端配置带来的非线性响应的大幅增加可能会影响到非线性光学以外的几个领域，包括检测和成像、电信和半导体激光。PIs还旨在利用我们大学提供的许多联系和项目，增加来自代表性不足群体的学生数量。

The objective of this program is to transform the observed 2-3 orders-of-magnitude enhancement of two-photon absorption (2PA) in direct bandgap semiconductors using extremely non-degenerate (END) frequencies into photonics device technologies. In the proposed research, radically new device ideas for optical detection and switching will be explored that are made possible by this new discovery. This research is transformative in that the enhanced 2PA results in improved performance, and the types of devices made possible are new and unique. END 2PA greatly decreases the required irradiances needed for such devices. The combination of huge enhancements in 2PA and nonlinear refraction opens up a new realm of possibilities for photonic devices. The intellectual merit is that using END nonlinearities for photonic device applications allows a large reduction in the irradiances needed for nonlinear optical devices. This opens up a new realm of 2PA-based devices as well as great potential for improvement on existing 2-photon based devices. This research will help determine the ultimate limits for these types of nonlinear photonic devices. The broader impacts are, besides funding the training of two Ph.D. students who will benefit from the rigorous graduate curriculum in Optics and Photonics at CREOL, that the large increase in nonlinear response enabled by END configurations has the potential to impact several fields beyond nonlinear optics, including detection and imaging, telecommunications and semiconductor lasers. The PIs also aim to increase the number of students from under-represented groups making use of the many connections and programs offered by our university.