Development of Ultra-Dense Plasmonic Sensors Arrays Using Epitaxial Periodically-Perforated Silver Films

使用外延周期性穿孔银膜开发超密集等离子体传感器阵列

• 批准号: 0928664
• 负责人: Gennady Shvets
• 金额: $ 45.83万
• 依托单位: University of Texas at Austin
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2009
• 资助国家: 美国
• 起止时间: 2009-09-01 至 2012-08-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=0928664&HistoricalAwards=false
• 关键词: Development; Ultra; Dense; Plasmonic; Sensors

The objective of this research effort is to develop plasmonic mid-infrared sensors based on epitaxially deposited silver films. The approach is to utilize the extraordinary optical transmission through arrays of sub-wavelength holes in a metal. Surface plasmon polaritons supported by such hole arrays are responsible for the extraordinary Optical transmission, and are highly sensitive to the refractive index of the surrounding medium or analyte. A recently discovered phenomenon of the omni-directional photonic bandgap will be utilized. To enhance the effect, atomically smooth metal films will be grown on various substrates. The omni-directional nature of the gap enables focusing light on an ultra-small (one wavelength across) sensor.If successful, the benefits of this research will include the development of novel tools for analyzing ultra-small amounts of multiple analytes for disease detection using mid-infrared sensing. The mid-infrared part of the spectrum is critically important for sensing applications because chemical composition of large and complex molecules can be revealed through their mid-infrared optical "fingerprints". These sensing techniques could potentially revolutionize label-free detection of biological and chemical substances. Future optical sensing devices should also be capable of processing minute amounts of analyte, and do so in a very dense format of small closely spaced sensors. The project will include significant outreach to high school, undergraduate, and graduate Hispanic students in Texas. High school students from local schools will conduct summer research in PI's laboratories, collaborate with graduate students, and receive mentorship from the recently established Mentorship Networks among minority students in the San Antonio/Austin area aimed at enhancing the interest and awareness of nanoscale science among minority students.

这项研究工作的目标是开发基于外延沉积银膜的等离子体中红外传感器。 该方法是利用金属中亚波长孔阵列的非凡光学传输能力。 这种孔阵列支持的表面等离子体激元负责非凡的光学传输，并且对周围介质或分析物的折射率高度敏感。 将利用最近发现的全向光子带隙现象。 为了增强效果，将在各种基材上生长原子级光滑的金属薄膜。 间隙的全向性质使得能够将光聚焦在超小型（跨一个波长）传感器上。如果成功，这项研究的好处将包括开发新工具，用于分析超少量的多种分析物，以使用中红外传感进行疾病检测。 光谱的中红外部分对于传感应用至关重要，因为大型复杂分子的化学成分可以通过中红外光学“指纹”来揭示。 这些传感技术可能会彻底改变生物和化学物质的无标记检测。 未来的光学传感设备还应该能够处理微量的分析物，并以非常密集的小型紧密排列的传感器的形式进行处理。 该项目将包括对德克萨斯州的高中、本科生和研究生的西班牙裔学生进行重大推广。来自当地学校的高中生将在 PI 实验室进行暑期研究，与研究生合作，并接受最近在圣安东尼奥/奥斯汀地区少数族裔学生中建立的导师网络的指导，该网络旨在提高少数族裔学生对纳米科学的兴趣和意识。