Rydberg Exciton in Atomically Thin Semiconductor for On-chip Quantum Optoelectronics

用于片上量子光电器件的原子薄半导体中的里德伯激子

• 批准号: 2139692
• 负责人: Sufei Shi
• 金额: $ 41.59万
• 依托单位: Rensselaer Polytechnic Institute
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2022
• 资助国家: 美国
• 起止时间: 2022-08-01 至 2025-07-31
• 项目状态: 未结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=2139692&HistoricalAwards=false
• 关键词: Rydberg; Exciton; Atomically; Thin; Semiconductor

Rydberg atom refers to a high energy atom with a size much larger than the atom at its lowest energy state. The large size of the Rydberg atoms enables strong interactions among themselves that can be exploited for quantum information science. Light excitation of semiconductors can generate positive and negative charges bound together, known as excitons. The tightly bound exciton at the high energy state, known as Rydberg exciton, is an analogue to the Rydberg atom and shares many superior properties, such as the strong interaction. Rydberg excitons in traditional semiconductors are either not stable enough or difficult to be patterned and controlled. The atomically thin semiconductors known as transitional metal dichalcogenides (TMDCs), however, host robust excitons and usher in an exciting platform of manipulating Rydberg excitons in two-dimension (2D). The Rydberg exciton in TMDCs also has a new quantum degree of freedom. We have recently developed a new measurement technique with high sensitivity to probe the largest 2D Rydberg exciton ever reported. In this proposal, we will pattern the atomically thin semiconductor so that we can control the in-plane electric field and study its interaction with the 2D Rydberg excitons. We will also probe the strong interaction between Rydberg excitons, which will pave the way for a new platform for quantum information science. The integrated education components train the next generation workforce for semiconductors, nanoscale technology, optical science and engineering through research opportunities, curriculum development, and outreach activities, with a particular emphasis on educating and recruiting under-represented 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 quantum information science and engineering.Technical Description: Rydberg atoms refer to the atoms with the outer electron occupying the highly excited state with a very large principal quantum number n. The strong interaction between Rydberg atoms leads to nonlinear effects such as the Rydberg blockade, providing a promising route for quantum computing and simulation. Rydberg exciton, an excited state of the optically excited electron-hole pair, is a condensed matter analogue of the Rydberg atom and can be directly used for optoelectronic devices thanks to mature fabrication and control technologies of semiconductors. Although high-order Rydberg excitons have been extensively studied in Cu2O crystals, it is difficult to pattern and control the Rydberg exciton in bulk semiconductors. Atomically thin semiconductors host robust exciton with large binding energy, which can also be efficiently controlled electrostatically, thereby opening doors to exciting opportunities for quantum optoelectronics. Here we propose to construct high-quality monolayer transitional metal dichalcogenides (TMDCs) devices in which we fabricate an on-chip p-n junction. We also propose to probe and control the Rydberg excitons through our recently developed photocurrent spectroscopy techniques, with which we have shown unprecedented high order Rydberg excitons in monolayer WSe2 with n = 11. We will investigate the Rydberg exciton’s sensitive response to the external electric and magnetic fields. We will also explore nonlinear effects and try to demonstrate the 2D Rydberg exciton blockade for the first time. This proposal will not only directly demonstrate a prototype of a quantum sensing device based on 2D Rydberg excitons but also paves the way for a ground-breaking platform to manipulate highly tunable 2D Rydberg excitons for quantum information science and engineering. 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, with special emphasis on recruiting under-represented groups. This proposal also includes outreach programs for K-12 students, such as working with Troy Boys and Girls Club.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.

Rydberg原子是指在最低的能量状态下的原子大的尺寸。 E Rydberg Atom并具有许多出色的特性，例如传统半导体中的Rydberg Ickits。 （2d）。 2D Rydberg激情量。课程，尤其着重于教育和招募代表性不足的团体。一个非常大的主cuantum数字。Rydberg原子之间的强相互作用会导致非线性效应，例如Rydberg封锁，有希望的量子计算途径，是量子计算的途径。由于半导体的成熟和控制技术，用于光电设备。我们建议在这里构建高质量的单层金属二分法（TMDCS）设备，我们在其中制造了芯片P-N连接，我们还建议探测Rydberg Incrosents thotocurrent Spectroscopy H ryd rydbergectroays excitons nocecopy in Morydberggecitons notoRAydberggeCitons nsewse。 n = 11。我们将研究敏感性的IELD。为开创性的平台铺平了道路，以操纵高度可调的2D rydberg激子，以获取量子信息和英语。代表该提议。