Polaritonics using two-dimensional atomic crystals

职务名称：超快开关架构的基础上半轻半物质准粒子（微腔极化激元）在二维晶体超导体光子学领域已经产生了巨大的影响，我们的生活通过应用在电信，显示技术，医学，传感，娱乐，替代能源系统和半未来的技术，如量子信息学。这些应用中使用的下一代光子系统和子系统将需要以超快速率（Tbps）运行，并且即使在很少的光子水平下也应该能够执行全光数据路由和处理。在这种情况下，努力主要是针对实现纯光子交换架构，以取代其电子对应物，从而导致更大的功率需求和更大的占地面积。 这个问题在这里通过利用最好的电子和光子的混合系统来解决。具体来说，开关架构将依赖于在二维晶体半导体中实现的称为微腔极化激元的半光半物质准粒子。它们有望成为实现低能量、超快、宽带宽、经典和量子信号处理开关和门以及图像处理的理想平台。这项研究还将有助于对纳米尺度下光与物质相互作用的基本理解。这项工作将提供独特的跨学科的科学教育，在一个新兴的领域，包括光学，材料科学和凝聚态物理研究生，本科生和高中学生从不同的社会经济背景和代表性不足的社区。技术支持：利用光子和物质的优势，该研究计划将研究光物质准粒子（微腔极化激元）作为超快低能开关和信号处理的平台。具体而言，将利用由过渡金属二硫属化物的二维激子与腔光子之间的强耦合形成的微腔极化激元。通过结合二维材料的新颖的物理性质，如谷和自旋自由度，微腔极化激元开关，执行在室温下的强度和偏振开关将被开发。此外，这些开关将被集成以演示逻辑门操作。 傅立叶空间光谱和泵浦探测技术将被用来表征非线性极化激元发射和开关动力学。室温极化激元开关和逻辑元件的发展代表了对传统的基于光子或基于电子的信号处理系统的重大偏离和进步。

Title: Ultrafast switching architectures based on half-light half-matter quasiparticles (microcavity polaritons) in two-dimensional crystalline semiconductorsThe field of photonics has had tremendous impact on our lives through applications in telecommunication, display technology, medicine, sensing, entertainment, alternative energy systems and in semi-futuristic technologies such as quantum informatics. The next generation photonic systems and subsystems used in these applications will need to operate at ultrafast rates (Tbps) and should be capable of performing all-optical data routing and processing even at few photon levels. In this context, effort has mostly been directed towards realizing purely photonic switching architectures to replace their electronic counterparts resulting in larger power requirement and bigger footprint. This issue is addressed here by exploiting hybrid systems that take the best of electronics and photonics. Specifically, the switching architectures will rely on half-light half-matter quasiparticles called microcavity polaritons realized in two-dimensional crystalline semiconductors. They are expected to be an ideal platform to realize low energy, ultrafast, wide bandwidth, switches and gates for signal processing at classical and quantum levels, and image processing. The study will also contribute to fundamental understanding of light-matter interaction at the nanoscale. This work will provide unique inter-disciplinary scientific education in an emerging field encompassing optics, materials science and condensed matter physics to graduate, undergraduate and high school students from diverse socio-economic backgrounds and under-represented communities. Technical: Exploiting the benefit of both photons and matter, this research program will investigate light-matter quasiparticles (microcavity polaritons) as a platform for ultrafast low energy switching and signal processing. Specifically, microcavity polaritons formed by the strong coupling between the two-dimensional excitons of transition metal dichalcogenides and cavity photons will be utilized. By combining the novel physical properties of the two-dimensional materials such as valley and spin degrees of freedom, microcavity polariton switches that perform both intensity and polarization switching at room temperature will be developed. In addition, these switches will be integrated to demonstrate logic gate operations. Fourier space spectroscopy and pump-probe techniques will be used to characterize the nonlinear polariton emission and the switching dynamics. The development of room temperature polaritonic switching and logic elements represents a significant departure and advancement from traditional photon based or electron based signal processing systems.