Collaborative Research: Cavity-Enhanced Exciton Emission from Carbon Nanotubes in the Intrinsic Regime

非技术描述：史蒂文斯理工学院和哥伦比亚大学之间的合作项目旨在理解和控制纳米级光子结构中光与晶体物质的相互作用。这项研究包括晶体线的材料生长，其直径只有一纳米，长度只有几微米。然后将这些所谓的纳米线与光子纳米结构集成，从而增强其发光能力。特别关注的是对这些纳米级结构中电荷如何与热和光相互作用的基本理解。最终，该研究项目能够提高芯片级光源和探测器的效率和性能，特别是实现量子通信技术所需的量子光源，例如支持国家安全。主要研究人员合作，通过视频链接团队教学，将新的基于研究的教育材料引入两个校区的研究生课程。本项目为研究生和本科生提供研究经验。史蒂文斯学院的外展活动利用了诸如工程项目中的女性等机构项目。在哥伦比亚大学，联合首席研究员开发了一种外展模式，与哥伦比亚数学、科学和工程中学（Columbia Secondary School for Math, Science, and Engineering）的教师建立了密切的伙伴关系，这是一所公立的6-12年级学校，有大量代表性不足的学生。技术描述：碳纳米管作为下一代光电子和量子光子器件的纳米材料，近年来获得了极大的兴趣。然而，到目前为止，大多数实验表明，由于与环境的外在相互作用，量子效率较低，降低了应用前景。该合作项目利用超清洁碳纳米管中具有固有自发光发射率和长时间激子脱相的超窄谱线宽度，并将其与光学腔集成在一起。具体而言，研究目标是：(1)大幅提高碳纳米管的光收集和光发射率，以证明高效的片上量子光源；(2)揭示固有的激子脱相机制和声子定位效应。该技术方法探索了将碳纳米管与金属介电天线和等离子体纳米腔相结合的方法，并通过操纵声子态密度进一步设计激子消相。该项目推进了对碳纳米管中基本光-物质相互作用的理解，特别是在纳米管中存在局域激子和声子的情况下，并有助于片上量子光子学和腔光力学的进步。

Nontechnical Description: This collaborative project between Stevens Institute of Technology and Columbia University seeks to understand and control the interaction of light with crystalline matter in nanoscale photonic structures. The research includes material growth of crystalline wires that are only one nanometer in diameter and several micrometers long. These so-called nanowires are then integrated with photonic nanostructures that strongly enhance their light emission. A particular focus is on the fundamental understanding of how electric charges interact with heat and light in these nanoscale structures. Ultimately, this research project enables an efficiency and performance boost for chip-scale light sources and detectors, in particular quantum-light sources that are needed to realize quantum-communication technologies to support, for example, national security. The principal investigators collaborate to introduce new research-based educational materials into the graduate curricula on both campuses by team-teaching these subjects via video link. This project offers research experience to graduate and undergraduate students. Outreach activities at Stevens leverage institutional programs such as the Women in Engineering Program. At Columbia, the co-principal investigator develops an outreach model that builds a close partnership with teachers at the Columbia Secondary School for Math, Science, and Engineering, a public, 6-12 school with a large population of under-represented students.Technical Description: Carbon nanotubes have recently gained tremendous interest as a nanomaterial for the next-generation optoelectronics and quantum photonic devices. To date, the majority of experiments revealed, however, low quantum efficiencies due to extrinsic interactions with the environment that lower the prospects for applications. The collaborative project takes advantage of an ultra-narrow spectral linewidth regime featuring intrinsic spontaneous light emission rates and prolonged exciton dephasing in ultraclean carbon nanotubes, and integrates them with optical cavities. Specifically, the research objectives are (1) to dramatically enhance the light collection as well as the optical emission rate of carbon nanotubes in order to demonstrate efficient on-chip quantum light sources and (2) to uncover the intrinsic exciton dephasing mechanism and acoustic-phonon localization effects. The technical approach explores methods to integrate carbon nanotubes with metallo-dielectric antennas and plasmonic nanocavities, and to further engineer the exciton dephasing via manipulation of the acoustic-phonon density of states. The project advances the understanding of fundamental light-matter interaction in carbon nanotubes, in particular in the presence of localized excitons and phonons along the nanotubes and contributes to advances in on-chip quantum photonics and cavity-optomechanics.