ERI: Development of light-emitting devices having intensive quantum-optical properties using a low-dimensional semiconducting material

ERI：使用低维半导体材料开发具有强量子光学特性的发光器件

• 批准号: 2301580
• 负责人: Jae Yong Suh
• 金额: $ 19.99万
• 依托单位: Michigan Technological University
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2023
• 资助国家: 美国
• 起止时间: 2023-06-01 至 2025-05-31
• 项目状态: 未结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=2301580&HistoricalAwards=false
• 关键词: ERI; Development; light; emitting; devices

The last few decades have seen significant technological advances in fabricating nanometer-scale structures and performing ultrafast laser spectroscopies. Physical or chemical phenomena occurring in extremely small distances (less than one micrometer) for extremely short time durations (less than one nanosecond) can be analyzed and understood with such advanced nanofabrication tools and methodologies. Superfluorescence (SF), collective light generations from an ensemble of interacting emitters in a nanometer-sized dimension, is one of the fascinating quantum phenomena. SF occurs when the light emitters synchronously behave under a single-mode electromagnetic field as they generate intensive short pulses. As a new type of bright light source, SF may find rich applications in quantum sensing, ultranarrow laser, and photonic-based quantum computation. The realization of SF, however, is challenging because it usually requires very low temperatures and stringent excitation conditions. This project uses a low-dimensional compound semiconductor called quasi-two-dimensional (2D) perovskites in thin film form. Indeed, a room-temperature SF has been observed in quasi-2D perovskite thin films, demonstrating that a room-temperature SF is feasible, but still, the quantum-optical properties of this SF akin to traditional SFs of gaseous phases have yet to be explored. Because of the potential inherent in a room temperature SF, it is of pressing importance that SFs from solid-state quasi-2D perovskites are refined and their exquisite quantum states measured. The proposed work will advance our understanding of the collective optical effects from a robust solid-state material and show the practical way to engineer and control the output properties of the quantum lights. This proposal aims to develop optical devices that control SF-lasing phase transitions by incorporating quasi-2D perovskite onto distributed feedback (DFB) resonators. Engineering monolithic resonant cavities with quasi-2D perovskites will provide optical controllability over the phase diagrams of SF-lasing transitions. Besides reproducing the existing results, the proposed project will perform (1) time-resolved photoluminescence spectroscopy on a femtosecond time scale to examine the dynamical characteristics of the SF emission from quasi-2D perovskite DFB resonators. This experiment will measure the SF build-up time required for the phase-synchronization of interacting emitters and the characteristic Rabi-type oscillations of photoluminescence decay curves, implying a strong light-matter coupling. Moreover, this project will perform (2) measurements of wavelength-dependent second-order correlation functions that will reveal the photon statistics and bunching characteristics of SFs. Finally, using homodyne detection tomography, the research team will (3) search for their non-classical photon states, such as displaced squeezed states. The pulsed and quantum nature of SF at room temperature may open a route toward realizing an ultrafast quantum light source. Photonic device fabrication and femtosecond time-resolved spectroscopy are the major experimental tasks of the project, which will also allow the exploitation of other emerging photoluminescent materials beyond perovskites. In addition, this project involves the development of a quantum optics lab course at Michigan Tech.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.

在过去的几十年里，在制造纳米尺度结构和进行超快激光光谱学方面取得了重大的技术进步。在极短的持续时间（小于一纳秒）内在极小的距离（小于一微米）中发生的物理或化学现象可以用这种先进的纳米制造工具和方法来分析和理解。超荧光（SF）是纳米尺度上相互作用的发光体集合产生的集体光，是一种迷人的量子现象。SF发生在当光发射器在单模电磁场下同步行为时，因为它们产生强烈的短脉冲。SF作为一种新型的高亮度光源，在量子传感、超窄激光和光子量子计算等领域有着广泛的应用前景。然而，SF的实现是具有挑战性的，因为它通常需要非常低的温度和严格的激励条件。该项目使用一种低维化合物半导体，称为薄膜形式的准二维（2D）钙钛矿。事实上，已经在准2D钙钛矿薄膜中观察到室温SF，这表明室温SF是可行的，但是这种SF类似于气相的传统SF的量子光学性质还有待探索。由于在室温SF中固有的潜力，从固态准2D钙钛矿中精炼SF并测量其精致的量子态是非常重要的。拟议的工作将推进我们对强大的固态材料的集体光学效应的理解，并展示工程和控制量子光输出特性的实用方法。该提案旨在开发通过将准2D钙钛矿结合到分布反馈（DFB）谐振器上来控制SF激光相变的光学器件。工程单片谐振腔与准二维钙钛矿将提供光学可控性的相位图的SF激光跃迁。除了再现现有的结果，该项目还将进行（1）飞秒时间尺度上的时间分辨光致发光光谱，以检查准2D钙钛矿DFB谐振器的SF发射的动力学特性。该实验将测量相互作用发射体的相位同步所需的SF建立时间和光致发光衰减曲线的特征拉比型振荡，这意味着强的光-物质耦合。此外，本计画将进行（2）波长相关二阶关联函数的量测，以揭示超晶格的光子统计与聚束特性。最后，利用零差探测层析成像，研究团队将（3）寻找它们的非经典光子态，如位移压缩态。SF在室温下的脉冲和量子性质可能会为实现超快量子光源开辟一条道路。光子器件制造和飞秒时间分辨光谱是该项目的主要实验任务，这也将允许开发钙钛矿之外的其他新兴光致发光材料。此外，该项目还涉及密歇根理工大学量子光学实验室课程的开发。该奖项反映了NSF的法定使命，并且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。