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这个合作项目旨在了解和控制纳米光子结构中光与晶体物质的相互作用。该研究包括直径仅为1纳米、长度仅为几微米的晶体线的材料生长。这些所谓的纳米线然后与光子纳米结构集成，强烈增强其光发射。一个特别的重点是对电荷如何与这些纳米结构中的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以支持国家安全所需的量子光源。主要研究人员合作，通过视频链接，通过团队教学这些科目，将新的基于研究的教育材料引入两个校区的研究生课程。该项目为研究生和本科生提供研究经验。史蒂文斯的外联活动利用机构计划，如妇女在工程计划。在哥伦比亚，共同首席研究员开发了一种推广模式，该模式与哥伦比亚数学、科学和工程中学的教师建立了密切的伙伴关系，该中学是一所公立学校，6-12岁，学生人数众多。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，最近引起了极大的兴趣。然而，迄今为止，大多数实验显示，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。该合作项目利用了超窄光谱线宽制度，其特点是超净碳纳米管中的固有自发光发射率和长时间激子退相，并将其与光学腔集成。具体而言，研究目标是（1）显着提高碳纳米管的光收集以及光发射率，以证明有效的片上量子光源和（2）揭示内在激子退相机制和声学声子局域化效应。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集成的方法，并通过操纵声学声子态密度进一步设计激子退相。该项目推进了对碳纳米管中基本光-物质相互作用的理解，特别是在沿纳米管沿着存在局部激子和声子的情况下，并有助于芯片上量子光子学和腔光学力学的进步。

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.