Reconfigurable flat optics

可重构平面光学器件

• 批准号: 1307948
• 负责人: Nanfang Yu
• 金额: $ 36万
• 依托单位: Columbia University
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2013
• 资助国家: 美国
• 起止时间: 2013-06-01 至 2017-05-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=1307948&HistoricalAwards=false
• 关键词: Reconfigurable; flat; optics

The objective of this research is to develop a new class of reconfigurable flat optical components that are able to dynamically mold optical wavefronts into arbitrary shapes with subwavelength resolution and fast speed. It focuses on the technologically important mid-infrared spectral range (wavelength 2-30?Ým), which is uniquely positioned to solve a number of important issues in security, health, and environment. The approach is to use active medium such as graphene, which has tunable optical conductivity in the mid-infrared, to shift the resonance of plasmonic antennas, leading to large and controllable changes to the amplitude and phase of the scattered light. Flat optical components will be created by assembling arrays of tunable plasmonic antennas.The intellectual merit of this research is that it addresses the fundamental problem of optical modulation: how to obtain considerable and tunable changes to the amplitude and phase of light, given a certain material perturbation. The broader impacts of this program lie in education, outreach, and implication for mid-infrared technology. The program provides unique educational opportunities in device design, modeling, fabrication and characterization for students of all levels through lab training and research. The program will also promote a collaborative effort between scientists and artists in producing artistic illustrations of scientific discoveries that are more accessible to the general public. The device prototypes developed in this program will have great promise for a variety of applications, such as mid-infrared light ranging and detection, free-space communication, security screening, and biomedical imaging.

这项研究的目的是开发一类新型可重构平面光学元件，能够将光学波前动态塑造成具有亚波长分辨率和快速的任意形状。它专注于技术上重要的中红外光谱范围（波长 2-30μm），该范围具有独特的优势，可以解决安全、健康和环境方面的许多重要问题。该方法是使用石墨烯等活性介质（其在中红外区域具有可调谐光导率）来移动等离子体天线的谐振，从而导致散射光的振幅和相位发生较大且可控的变化。平面光学元件将通过组装可调谐等离子体天线阵列来创建。这项研究的智力价值在于它解决了光调制的基本问题：在给定一定的材料扰动的情况下，如何获得光的振幅和相位的可观且可调谐的变化。该计划更广泛的影响在于中红外技术的教育、推广和影响。该项目通过实验室培训和研究为各个级别的学生提供设备设计、建模、制造和表征方面独特的教育机会。该计划还将促进科学家和艺术家之间的合作，制作更容易为公众所接受的科学发现的艺术插图。该项目开发的设备原型将在中红外光测距和检测、自由空间通信、安全筛查和生物医学成像等各种应用中具有广阔的前景。