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.

光与物质的相互作用在现代技术中发挥着至关重要的作用，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薄半导体中以一种新的形式出现，其中光产生了结合正电荷和负电荷的新粒子。理解和操纵这些粒子可以改进设备，甚至实现目前不可能的新功能，例如节能存储设备和量子计算，将不同层的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。不可能有新的属性该职业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，所获得的理解可以为如何利用这种新的光-物质相互作用提供线索。综合教育部分通过研究机会、课程开发和推广活动，培养下一代纳米级科学和工程人才，重点是鼓励。妇女的参与和伦斯勒理工学院的现有项目和新开发的外展项目将用于鼓励 K-12 学生在先进光学科学和纳米技术领域进行研究，特别是单层过渡金属二硫化物的出现。 （TMDC）为利用激子物理实现量子光电子学带来了前所未有的机遇，而对激子固有特性的理解往往受到样品质量的阻碍。高质量的单层 TMDC 器件，该职业项目旨在采用先进的光谱技术来研究单层 TMDC 中独特的光与物质相互作用，重点是对激子特性控制至关重要的多体物理。 、电场和磁场，为光谱学研究提供额外的调谐旋钮，还将构建具有干净界面的范德华异质结构 TMDC 器件，以研究令人着迷的中间层。此外，异质双层 TMDC 的扭转角将受到控制，以产生莫尔势，以进一步设计层间激子，为新兴的量子态提供紧密集成的研究和教育组件。为研究生、本科生和 K-12 学生提供有关先进光学光谱、纳米级器件制造和量子材料的培训机会。该奖项反映了 NSF 的法定使命，并通过使用基金会的智力评估进行评估，认为值得支持优点和更广泛的影响审查标准。

项目成果

Tuning moiré excitons and correlated electronic states through layer degree of freedom

通过层自由度调节莫尔激子和相关电子态

• DOI: 10.1038/s41467-022-32493-9
• 发表时间: 2022-08
• 期刊: Nature Communications
• 影响因子: 16.6
• 作者: Chen, Dongxue;Lian, Zhen;Huang, Xiong;Su, Ying;Rashetnia, Mina;Yan, Li;Blei, Mark;Taniguchi, Takashi;Watanabe, Kenji;Tongay, Sefaattin;et al
• 通讯作者: et al

Orientation-Controlled Large-Area Epitaxial PbI 2 Thin Films with Tunable Optical Properties

具有可调光学特性的取向控制大面积外延 PbI 2 薄膜

• DOI: 10.1021/acsami.1c05734
• 发表时间: 2021-07
• 期刊: ACS Applied Materials & Interfaces
• 影响因子: 9.5
• 作者: Ghoshal, Debjit;Shang, Hanzhi;Sun, Xin;Wen, Xixing;Chen, Dongxue;Wang, Tianmeng;Lu, Zonghuan;Gupta, Tushar;Efstathiadis, Harry;West, Damien;et al
• 通讯作者: et al

Giant Valley-Polarized Rydberg Excitons in Monolayer WSe 2 Revealed by Magneto-photocurrent Spectroscopy

磁光电流光谱揭示单层 WSe 2 中的巨谷偏振里德伯激子

• DOI: 10.1021/acs.nanolett.0c03167
• 发表时间: 2020-10
• 期刊: Nano Letters
• 影响因子: 10.8
• 作者: Wang, Tianmeng;Li, Zhipeng;Li, Yunmei;Lu, Zhengguang;Miao, Shengnan;Lian, Zhen;Meng, Yuze;Blei, Mark;Taniguchi, Takashi;Watanabe, Kenji;et al
• 通讯作者: et al

Anisotropic band structure of TiS 3 nanoribbon revealed by polarized photocurrent spectroscopy

偏振光电流光谱揭示TiS 3 纳米带各向异性能带结构

• DOI: 10.1063/5.0019828
• 发表时间: 2020-08
• 期刊: Applied Physics Letters
• 影响因子: 4
• 作者: Lian, Zhen;Jiang, Zeyu;Wang, Tianmeng;Blei, Mark;Qin, Ying;Washington, Morris;Lu, Toh;Tongay, Sefaattin;Zhang, Shengbai;Shi, Su
• 通讯作者: Shi, Su

Excitonic insulator in a heterojunction moiré superlattice

异质结莫尔超晶格中的激子绝缘体

• DOI: 10.1038/s41567-022-01703-y
• 发表时间: 2022-10
• 期刊: Nature Physics
• 影响因子: 19.6
• 作者: Chen, Dongxue;Lian, Zhen;Huang, Xiong;Su, Ying;Rashetnia, Mina;Ma, Lei;Yan, Li;Blei, Mark;Xiang, Li;Taniguchi, Takashi;et al
• 通讯作者: et al