Assemblies of Metal Nanoparticles and Single Quantum Dots with Low-Power, Ultrafast Nonlinear Optical Response

具有低功率、超快非线性光学响应的​​金属纳米颗粒和单量子点组件

• 批准号: 1905135
• 负责人: Matthew Pelton
• 金额: $ 46.26万
• 依托单位: University of Maryland Baltimore County
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2019
• 资助国家: 美国
• 起止时间: 2019-09-01 至 2024-08-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=1905135&HistoricalAwards=false
• 关键词: Assemblies; Metal; Nanoparticles; Single; Quantum

The ability to continue to build faster, more powerful computers is reaching a limit set by the amount of energy needed to run the computers. It may be possible to overcome this energy barrier by replacing electronic components, which use electrical current to process information, with photonic components, which use light to process information, but only if ultrafast, ultrasmall, and ultra-low-power photonic devices can be built. This project develops one class of these devices, which can serve to control the flow of light in future all-optical computers. This is accomplished by using chemical means to produce nanometer-scale metal and semiconductor particles and to induce strong optical interactions among the particles by assembling them into controlled hybrid arrangements. These scientific goals are integrated with efforts to broaden the diversity of the scientific workforce, through the involvement of high-school, undergraduate, and graduate students in cutting-edge research, particularly students from underrepresented groups, female students, and veterans.The objective of this project is to produce assemblies of metal nanoparticles (MNPs) and single quantum dots (QDs) with nonlinear optical response at ultralow incident powers. The nonlinearity arises due to near-field optical interactions among the nanoparticles and is qualitatively different from the response of the components separately. Assemblies of colloidal QDs and MNPs with strong interparticle interactions are fabricated through the chemical synthesis of QDs and anisotropic gold nanoparticles (nanorods or bipyramids), the selective covalent binding of single QDs to the ends of the MNPs to form MNP-QD-MNP trimers, and the separation of these trimers from smaller and larger assemblies. Optical functionality is verified by correlated linear and nonlinear optical spectroscopy and electron-microscope imaging of individual assemblies. Experimental results are compared to numerical simulations, enabling detailed understanding of structure-property relationships and optimization of the nonlinear response.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.

继续建造更快、更强大的计算机的能力已经达到了运行计算机所需能量的极限。通过用光子元件取代电子元件来克服这一能量障碍是可能的，电子元件使用电流来处理信息，光子元件使用光来处理信息，但只有在超快，超小和超低功率的光子器件可以建造的情况下。该项目开发了一类此类器件，可用于控制未来全光学计算机中的光流动。这是通过使用化学手段来生产纳米尺度的金属和半导体颗粒，并通过将它们组装成受控的混合排列来诱导颗粒之间的强光学相互作用来实现的。 这些科学目标与努力扩大科学劳动力的多样性相结合，通过高中，本科和研究生参与前沿研究，特别是来自代表性不足群体的学生，女学生，该项目的目标是生产金属纳米颗粒（MNP）和单量子点（QD）的组装体。在超低入射功率下具有非线性光学响应。非线性是由于纳米粒子之间的近场光学相互作用而产生的，并且与单独的组件的响应在性质上不同。通过化学合成QD和各向异性金纳米颗粒（纳米棒或双锥），将单个QD选择性共价结合到MNP的末端以形成MNP-QD-MNP三聚体，以及将这些三聚体从较小和较大的组装体中分离，来制造具有强颗粒间相互作用的胶体QD和MNP的组装体。光学功能验证相关的线性和非线性光学光谱和电子显微镜成像的个别组件。实验结果与数值模拟结果进行了比较，从而详细了解了结构-性能关系并优化了非线性响应。该奖项反映了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

Ultrastrong plasmon–phonon coupling via epsilon-near-zero nanocavities

通过ε-近零纳米腔实现超强等离子体-声子耦合

• DOI: 10.1038/s41566-020-00731-5
• 发表时间: 2021
• 期刊: Nature Photonics
• 影响因子: 35
• 作者: Yoo, Daehan;de León-Pérez, Fernando;Pelton, Matthew;Lee, In-Ho;Mohr, Daniel A.;Raschke, Markus B.;Caldwell, Joshua D.;Martín-Moreno, Luis;Oh, Sang-Hyun
• 通讯作者: Oh, Sang-Hyun

Angle-independent plasmonic substrates for multi-mode vibrational strong coupling with molecular thin films

• DOI: 10.1063/5.0039195
• 发表时间: 2021-03-14
• 期刊: JOURNAL OF CHEMICAL PHYSICS
• 影响因子: 4.4
• 作者: Brawley, Zachary T.;Storm, S. David;Sheldon, Matthew
• 通讯作者: Sheldon, Matthew