High-repetition rate tunable laser system for low-noise measurements in nanophotonics

用于纳米光子学低噪声测量的高重复率可调谐激光系统

• 批准号: 450233468
• 金额: --
• 依托单位: Ludwig-Maximilians-Universität München (LMU)
• 依托单位国家: 德国
• 项目类别: Major Research Instrumentation
• 财政年份: 2020
• 资助国家: 德国
• 起止时间: 2019-12-31 至 无数据
• 项目状态: 未结题
• 来源: https://gepris.dfg.de/gepris/projekt/450233468?language=en
• 关键词: repetition; rate; tunable; laser; system

In order to establish new research lines in the area of nanophotonics in the visible and near-infrared part of the spectrum we need a powerful and highly tunable pulsed laser source with a high repetition rate of dozens of MHz. This will enable us to conduct measurements with a low noise level, which is not possible with the current systems available in our ultrafast laboratory. The new light source will be coupled with existing infrastructure available in this lab, particularly an interferometric pulse compression system and a confocal microscope setup, which enables experiments at single nanostructure level. Two particular examples of newly enabled research are in the areas of energy conversion from photons to acoustic surface waves, and in the coupling of single-photon emitters such as nanodiamonds with hybrid nanophotonic resonators. The planned experiments necessitate high average excitation powers, wide tunability over the whole of the visible and near-infrared spectrum, and a high repetition rate, in order to allow measurements with a signal several orders of magnitude above the dark noise level. Additional research fields where we will use the new laser system are in the area of non-linear photonics of hybrid nanostructures, consisting of both plasmonic and dielectric materials as well as 2D structures. The preferred laser system has as distinguishing factors a high average power, broad tunability from 350 to 4000 nm wavelength, and a high flexibility for various pump/probe configurations.

为了在可见光和近红外光谱部分的纳米光子学领域建立新的研究路线，我们需要一个强大的、高度可调谐的脉冲激光源，其重复频率高达几十兆赫兹。这将使我们能够以低噪声水平进行测量，而这对于我们超快实验室中现有的系统来说是不可能的。新光源将与该实验室现有的基础设施相结合，特别是干涉脉冲压缩系统和共焦显微镜装置，从而实现单纳米结构水平的实验。新开展的研究的两个具体例子是从光子到声表面波的能量转换领域，以及单光子发射器（例如纳米金刚石）与混合纳米光子谐振器的耦合。计划中的实验需要高平均激发功率、整个可见光和近红外光谱的宽可调性以及高重复率，以便能够测量比暗噪声水平高几个数量级的信号。我们将使用新激光系统的其他研究领域是混合纳米结构的非线性光子学领域，由等离子体和介电材料以及二维结构组成。优选的激光系统具有高平均功率、350 至 4000 nm 波长的宽可调性以及对各种泵浦/探针配置的高灵活性等显着因素。