Nontechnical description: This project will study a new approach to improving the light-detecting performance of optoelectronic devices by using special hybrid light-matter waves called exciton-polaritons. These waves can carry optical energy across ultrathin materials over much longer distances than ordinary excitations, creating opportunities for devices that detect light more efficiently, respond more rapidly, and even sense light away from the main active region. The research will focus on atomically thin two-dimensional (2D) semiconductor materials, which are promising building blocks for next-generation photodetectors, on-chip optical communication systems, and advanced sensing technologies. By revealing how these hybrid waves move and deliver energy within 2D nanoscale devices, the project could open new pathways for compact, high-performance optoelectronic technologies important to future communications, sensing, and semiconductor innovation. The project will support education and workforce development in optics, nanotechnology, and quantum materials. Research outcome will be incorporated into university coursework and outreach activities, including engagement with K-12 students and teachers. Undergraduate and graduate students will receive hands-on training in nanomaterial fabrication, optical measurements, nano-imaging, and device characterization, helping prepare a skilled STEM workforce in emerging areas of semiconductor and quantum technologies. Technical des