Polaritonics using two-dimensional atomic crystals

使用二维原子晶体的极化子学

• 批准号: 1509551
• 负责人: Vinod Menon
• 金额: $ 29.93万
• 依托单位: CUNY City College
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2015
• 资助国家: 美国
• 起止时间: 2015-07-01 至 2018-06-30
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=1509551&HistoricalAwards=false
• 关键词: Polaritonics; using; two; dimensional; atomic

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.

标题：二维晶体半导体中基于半光半物质准粒子（微腔极化子）的超快开关架构光子学领域通过在电信、显示技术、医学、传感、娱乐、替代能源系统以及量子信息学等半未来技术中的应用，对我们的生活产生了巨大影响。这些应用中使用的下一代光子系统和子系统需要以超快速率 (Tbps) 运行，并且即使在几个光子级别也应该能够执行全光数据路由和处理。在这种情况下，人们的努力主要集中在实现纯光子开关架构以取代其电子对应架构，从而导致更大的功率需求和更大的占地面积。 这里通过利用充分利用电子学和光子学优点的混合系统来解决这个问题。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耗、超快、宽带宽、经典和量子级别信号处理以及图像处理的开关和门的理想平台。该研究还将有助于对纳米尺度光与物质相互作用的基本理解。这项工作将为来自不同社会经济背景和代表性不足的社区的研究生、本科生和高中生提供光学、材料科学和凝聚态物理等新兴领域独特的跨学科科学教育。技术：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）作为超快低能量切换和信号处理的平台。具体来说，将利用过渡金属二硫属化物的二维激子与腔光子之间强耦合形成的微腔极化激元。通过结合二维材料的新颖物理特性（例如谷和自旋自由度），将开发出在室温下执行强度和偏振切换的微腔极化子开关。此外，这些开关将被集成以演示逻辑门操作。 傅里叶空间光谱和泵浦探针技术将用于表征非线性极化子发射和开关动力学。室温极化子开关和逻辑元件的发展代表了与传统基于光子或基于电子的信号处理系统的重大背离和进步。