具有主动元表面的时空光控制
Amr M Shaltout1, Vladimir M Shalaev2, Mark L Brongersma3
1Geballe Lab for Advanced Materials, Stanford University, Stanford, CA 94305, USA.
概括
研究人员正在探索光学元表面的时间域结构,以实现先进的光控制. 这种动态方法为新兴技术的活跃波塑造带来革命性的平面光学.
科学领域:
- 光学和光学
- 材料科学
- 纳米技术
背景情况:
- 光学超表面通过空间材料结构来控制光.
- 马克斯韦方程的时空二元性表明时间结构可以增强光学控制.
研究的目的:
- 探索光学元表面的时间域结构的潜力.
- 研究新材料和纳米结构的动态光学特性变化.
- 了解超快调整的超表面的新兴物理.
主要方法:
- 新材料和纳米结构的开发.
- 对超级表面的超快调机制的研究.
- 在光学系统中探索时空二元原则.
主要成果:
- 新兴的物理学包括多普勒效应模拟,洛伦兹非互惠,时间反转光学和负折射.
- 超快速调整的元表面正在成为可能.
- 具有活跃波面成型的动态平面光学潜力.
结论:
- 光学元表面的时间域结构提供了对光的扩展控制.
- 进步依赖于具有快速,大光学特性变化的材料.
- 动态平面光学可以彻底改变需要紧,高效的波面造型的技术.
相关概念视频
Light Acquisition
9.4K
In order to produce glucose, plants need to capture sufficient light energy. Many modern plants have evolved leaves specialized for light acquisition. Leaves can be only millimeters in width or tens of meters wide, depending on the environment. Due to competition for sunlight, evolution has driven the evolution of increasingly larger leaves and taller plants, to avoid shading by their neighbors with contaminant elaboration of root architecture and mechanisms to transport water and nutrients.
9.4K
Light as Energy
95.6K
The energy required to carry out photosynthesis is light— typically electromagnetic radiation from the sun. The range of all possible wavelengths is known as the electromagnetic spectrum.
Photons
A photon is a discrete electromagnetic particle or bundle of energy. Photons are characterized by their frequency, wavelength, and amplitude, similar to the properties of a wave. Waves with higher frequencies transmit more energy and have shorter wavelengths than longer wavelengths that transmit...
Photons
A photon is a discrete electromagnetic particle or bundle of energy. Photons are characterized by their frequency, wavelength, and amplitude, similar to the properties of a wave. Waves with higher frequencies transmit more energy and have shorter wavelengths than longer wavelengths that transmit...
95.6K
Photoreceptors and Plant Responses to Light
28.4K
Light plays a significant role in regulating the growth and development of plants. In addition to providing energy for photosynthesis, light provides other important cues to regulate a range of developmental and physiological responses in plants.
28.4K
The Wave Nature of Light
61.1K
The nature of light has been a subject of inquiry since antiquity. In the seventeenth century, Isaac Newton performed experiments with lenses and prisms and was able to demonstrate that white light consists of the individual colors of the rainbow combined together. Newton explained his optics findings in terms of a "corpuscular" view of light, in which light was composed of streams of extremely tiny particles traveling at high speeds according to Newton's laws of motion.
61.1K
Control System Problem
421
In an open-loop system, such as a basic thermostat, the poles of the transfer function influence the system's response but do not determine its stability. However, when feedback is introduced to form a closed-loop system, such as an advanced thermostat that adjusts heating based on room temperature, stability is governed by the new poles of the closed-loop transfer function.
When forming a closed-loop system, issues can arise if the poles cross into the unstable region, leading to potential...
When forming a closed-loop system, issues can arise if the poles cross into the unstable region, leading to potential...
421
Types of Biopharmaceutical Studies: Controlled and Non-Controlled Approaches
417
Biopharmaceutical studies constitute a vital field aiming to enhance drug delivery methods and refine therapeutic approaches, drawing upon diverse interdisciplinary knowledge. In research methodologies, the choice between controlled and non-controlled studies significantly influences the study's reliability and accuracy.
Non-controlled studies, commonly employed for initial exploration, lack a control group, rendering them susceptible to biases and external influences. In contrast,...
Non-controlled studies, commonly employed for initial exploration, lack a control group, rendering them susceptible to biases and external influences. In contrast,...
417


