Exploiting tailored disorder in dielectric nanosurfaces to maximize their information capacity

利用介电纳米表面的定制无序性来最大化其信息容量

• 批准号: 278747906
• 负责人: Professor Dr. Thomas Pertsch
• 金额: --
• 依托单位: Institut für Angewandte Physik
• 依托单位国家: 德国
• 项目类别: Priority Programmes
• 财政年份: 2015
• 资助国家: 德国
• 起止时间: 2014-12-31 至 2022-12-31
• 项目状态: 已结题
• 来源: https://gepris.dfg.de/gepris/projekt/278747906?language=en
• 关键词: Exploiting; tailored; disorder; dielectric; nanosurfaces

Dielectric nanosurfaces imprint information onto an incident field by spatially varying its phase/amplitude deterministically. The highest efficiency is achieved if the strongly scattering objects are made from high-permittivity materials. If operated at their duality point, perfect transmission is achieved. This unlocks a plethora of exciting application in lighting and imaging devices, ultra-thin display technologies, for wavefront manipulation, and beam shaping. However, there is no free lunch and the ability to control light disruptively comes at the expense of a heavily pronounced long-range interaction. This prohibits to encode even a decent amount of information if these scatterers were arranged periodically. In the first SPP funding period, we explored how disorder in the arrangement of these scatterers suppresses this long-range interaction and studied the impact of disorder on the optical response of nanosurfaces. In joint efforts, we mastered the basic properties of disordered nanosurfaces and unravelled unexpected phenomena, e.g. a disorder induced phase transition in the response of the nanosurface. Altogether, our work opens the doors for a plethora of investigations in the second funding period.The common theme of our research strands in the second funding period is the maximization of the information capacity encoded into our nanosurfaces. This concerns both the number of independent channels encoded within the same area of the nanosurface but also the information density encoded in each channel.In a first research strand, we concentrate on wavefront shaping nanosurfaces where the information density is enhanced by explicitly exploiting disorder. The disorder is spatially tailored to adjust the local amplitude and phase of the transmitted light. This full control within a single material layer will implement exact and not just approximate holograms. We also aim to exploit the spectral/angular dispersive response to implement holograms at different wavelengths/illumination fields. In a second research strand, these abilities are used to tailor the diffusive scattering in selected demonstrators. We study devices that redirect the incident light in a continuous fashion and probe to which extent a nanosurface can mimic the response from an ordinary 3D random media. This will answer the question into which tiny space the information from a bulk media can be encoded.In a third research strand, we question to which extent we can learn from nature to perceive nanosurfaces that offer a desired response. In all but particularly in this last research strand we expect to work together with other partners from the SPP and to contribute to its overarching goals. Our work on studying light propagation in disordered nanosurfaces combines scientific challenge, intellectual beauty, and practical utility. We safely anticipate that our insights contribute simultaneously to the wider developments of optics and photonics and material sciences.

介电纳米表面通过确定性地改变其相/幅度，将其刻度信息刻度在事件场上。如果强烈散射的物体是由高渗透率材料制成的，则可以达到最高的效率。如果在其双重性点运行，则可以实现完美的传输。这可以在照明和成像设备，超薄显示技术，用于波前操作和光束塑造中解锁大量令人兴奋的应用。但是，没有免费的午餐，并且能够以严重的长距离互动为代价来控制光线的能力。如果定期安排这些散射器，这将禁止编码相当数量的信息。在第一个SPP的资金期间，我们探讨了这些散射器排列中的混乱如何抑制这种长期相互作用，并研究了疾病对纳米表面光学反应的影响。在联合努力中，我们掌握了无序纳米表面的基本特性，并阐明了意外现象，例如疾病诱导纳米表面响应中的相变。总的来说，我们的工作为在第二个融资期间进行了大量调查的门打开了大门。第二融资期，我们的研究链的共同主题是对我们纳米表面中编码的信息能力的最大化。这涉及在纳米表面同一区域内编码的独立通道的数量，也涉及每个通道中编码的信息密度。在第一个研究链中，我们集中于波前塑造纳米面积的纳米面积，其中通过显式利用障碍来增强信息密度。该疾病是在空间上量身定制的，以调节发射光的局部幅度和相位。单个材料层中的完全控制将实现精确的，而不仅仅是近似全息图。我们还旨在利用在不同波长/照明场的实施全息图的光谱/角度分散响应。在第二个研究方面，这些能力用于定制选定示威者中的扩散散射。我们研究以连续的方式和探针重定向的设备，纳米表面可以模仿普通3D随机介质的响应。这将回答以下问题，可以编码来自批量媒体的信息。在第三次研究链中，我们质疑我们可以从自然中学习的程度以感知提供所需响应的纳米表面。除了在最后一项研究方面，我们希望与SPP的其他合作伙伴一起工作，并为其总体目标做出贡献。我们在研究无序纳米表面的光传播方面的工作结合了科学挑战，智力美和实用性。我们安全地预料到我们的见解会同时促进光学和光子学和物质科学的更广泛发展。