CAREER:Light-Matter Interaction in Van der Waals Heterostructures of Atomically Thin Semiconductors

职业：原子薄半导体范德华异质结构中的光与物质相互作用

• 批准号: 1945420
• 负责人: Sufei Shi
• 金额: $ 59.92万
• 依托单位: Rensselaer Polytechnic Institute
• 依托单位国家: 美国
• 项目类别: Continuing Grant
• 财政年份: 2020
• 资助国家: 美国
• 起止时间: 2020-06-01 至 2025-05-31
• 项目状态: 未结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=1945420&HistoricalAwards=false
• 关键词: CAREER; Light; Matter; Interaction; Van

Light-matter interaction plays a critical role in modern technologies, including solar cells, photodetection, and light-emitting devices. This interaction takes a new form in the atomically thin semiconductors, in which new particles combining positive and negative charges are created by light. Understanding and manipulating these particles could improve devices and even realize new functions that are not currently possible, such as power-efficient memory devices and quantum computing. Stacking different layered semiconductors together and tuning the layer-layer interaction could further engineer these particles and lead to new properties not feasible in conventional materials. The main objectives of this CAREER project are to explore and investigate the unique light-matter interaction and emerging properties in individual and stacked atomically thin semiconductors. The gained understanding can shed light on how to exploit this new light-matter interaction in confined space for future optoelectronics with better efficiency, faster speed, or even novel functions. The integrated education component trains the next generation workforce for science and engineering at the nanometer scale through research opportunities, curriculum development, and outreach activities, with a focus on encouraging the participation of women and underrepresented groups. Both existing programs at Rensselaer Polytechnic Institute and newly developed outreach programs will be utilized to encourage K-12 students to study in the field of advanced optical science and nanoscale technology. The emergence of two-dimensional semiconductors, especially monolayer transition metal dichalcogenides (TMDCs), ushers in unprecedented opportunities in exploiting the excitonic physics for quantum optoelectronics, while the understanding of intrinsic properties of the exciton is often hindered by the sample quality. By fabricating high-quality monolayer TMDC devices, this CAREER project aims to employ advanced optical spectroscopy techniques to study the unique light-matter interaction in monolayer TMDCs, with a focus on many-body physics that is critical for the exciton properties. The device and measurement configurations enable the control of doping, electrical field, and magnetic field, which provide additional tuning knobs for the spectroscopy study. Van der Waals heterostructure TMDCs devices with clean interfaces will also be constructed to investigate fascinating interlayer excitons, with the electron and hole residing in different layers. In addition, the twist angle of the hetero-bilayer TMDCs will be controlled to create a Moiré potential to further engineer interlayer excitons for emerging quantum states. The closely integrated research and education components provide training opportunities for graduate, undergraduate, and K-12 students on advanced optical spectroscopy, nanoscale device fabrication, and quantum materials.This award reflects NSF's statutory mission and has been deemed worthy of support through evaluation using the Foundation's intellectual merit and broader impacts review criteria.

光-物质相互作用在现代技术中起着关键作用，包括太阳能电池、光电探测和发光器件。这种相互作用在原子级薄的半导体中以一种新的形式出现，在这种半导体中，由光产生了结合正负电荷的新粒子。理解和操纵这些粒子可以改进设备，甚至实现目前不可能实现的新功能，例如节能存储设备和量子计算。 将不同的层状半导体堆叠在一起并调整层与层之间的相互作用可以进一步设计这些粒子，并导致传统材料不可行的新特性。这个CAREER项目的主要目标是探索和研究单个和堆叠的原子薄半导体中独特的光-物质相互作用和新兴特性。所获得的理解可以揭示如何在有限空间中利用这种新的光-物质相互作用，为未来的光电子学提供更好的效率，更快的速度，甚至是新颖的功能。综合教育部分通过研究机会、课程开发和外联活动，在纳米尺度上培训下一代科学和工程劳动力，重点是鼓励妇女和代表性不足的群体参与。伦斯勒理工学院现有的项目和新开发的推广项目都将用于鼓励K-12学生在先进的光学科学和纳米技术领域学习。二维半导体材料，特别是单层过渡金属二硫属化物（TMDCs）的出现，为量子光电子学中激子物理的研究带来了前所未有的机遇，但对激子本征性质的理解常常受到样品质量的限制。通过制造高质量的单层TMDC器件，该CAREER项目旨在采用先进的光学光谱技术来研究单层TMDC中独特的光-物质相互作用，重点关注对激子特性至关重要的多体物理。该设备和测量配置能够控制掺杂、电场和磁场，这为光谱研究提供了额外的调谐旋钮。具有干净界面的货车德瓦耳斯异质结构TMDC器件也将被构造成研究迷人的层间激子，电子和空穴驻留在不同的层中。此外，异质双层TMDC的扭转角将被控制以产生莫尔势，从而进一步设计层间激子以形成量子态。这个紧密结合的研究和教育部分为研究生、本科生和K-12学生提供了先进光谱学、纳米器件制造和量子材料方面的培训机会。这个奖项反映了NSF的法定使命，并通过使用基金会的知识价值和更广泛的影响审查标准进行评估，被认为值得支持。

项目成果

Metal Ion-Incorporated Lead-Free Perovskites toward Broadband Photodetectors

• DOI: 10.1021/acsaelm.2c01265
• 发表时间: 2023-01
• 期刊: ACS Applied Electronic Materials
• 影响因子: 4.7
• 作者: Junhua Shen;Weiguang Zhu;Zhen Lian;Aming Lin;Sufei Shi;Kun Yang;Mingxin Li;Dong Zhao

Six-Body and Eight-Body Exciton States in Monolayer WSe2

• DOI: 10.1103/physrevlett.129.076801
• 发表时间: 2022-08-09
• 期刊: PHYSICAL REVIEW LETTERS
• 影响因子: 8.6
• 作者: Tuan, Dinh Van;Shi, Su-Fei;Dery, Hanan
• 通讯作者: Dery, Hanan

Phonon-exciton Interactions in WSe2 under a quantizing magnetic field

• DOI: 10.1038/s41467-020-16934-x
• 发表时间: 2020-06-19
• 期刊: NATURE COMMUNICATIONS
• 影响因子: 16.6
• 作者: Li, Zhipeng;Wang, Tianmeng;Shi, Su-Fei
• 通讯作者: Shi, Su-Fei