Band Flips and Bound States in Leaky-Mode Resonant Photonic Lattices

漏模谐振光子晶格中的能带翻转和束缚态

• 批准号: 1809143
• 负责人: Robert Magnusson
• 金额: $ 36万
• 依托单位: University of Texas at Arlington
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2018
• 资助国家: 美国
• 起止时间: 2018-09-01 至 2023-08-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=1809143&HistoricalAwards=false
• 关键词: Band; Flips; Bound; States; Leaky

Abstract title: Band Flips and Bound States in Leaky-Mode Resonant Photonic LatticesNontechnical partA photonic lattice is a periodic structure of materials with differing refractive indices. It is analogous to the familiar crystal lattice possessing a regular atomic arrangement. Photonic lattices effectively reflect, filter, and redirect incident light. Metamaterials constitute a new class of photonic lattices wherein principal performance metrics are controlled by the properties of a collection of subwavelength particles. Periodic and aperiodic metasurfaces and metagratings can be fashioned to provide complex functionality in extremely compact format even as single-layer films. Lossless dielectric media are particularly promising for high-efficiency applications. Thus, there is great interest in exploring metamaterials as building blocks for high-performance photonic devices including metalenses, perfect reflectors, and new types of holograms. Here, we propose to demonstrate new fundamental effects in nanophotonic resonance systems that are connected to asymptotic bound states in the spectral continuum. The new understanding generated under the project may lead to innovative ways to control light. The project provides excellent analytical and experimental experience for undergraduate and graduate students thus supporting the development of the next-generation workforce in photonics technology. If successful, the project will lead to innovative optical engineering ideas with substantial economic benefits and societal value. Technical partThe objective of this research is to conduct research into band flips found to occur in leaky-mode photonic lattices. Their connection with non-leaky photonic states or bound states in the continuum (BIC) is of great interest. We seek solid physical understanding of these band flips and associated bound-state transitions and propose to demonstrate them experimentally with proof-of-concept prototypes. These elements will be fashioned as periodic nanostructures in nanocomposites with nanoimprint lithography allowing perfect control of spatial modulation, harmonic content, and spectral linewidths. We investigate fundamental aspects of the resonance interactions in these devices. The detailed spectral properties including band structure will be measured. Thus, we will treat photonic thin-film lattices supporting resonant leaky modes. Their properties include versatile spectra, polarization effects, substantial resonant Q-factors with strong local fields, and phase control. The band structure is unique supporting a leaky edge and a non-leaky edge for each supported resonant mode if the lattice is symmetric. The non-leaky edge is associated with a bound state in the continuum (BIC), or embedded eigenvalue, currently of great scientific interest. It is possible to control the width of the leaky band gap by lattice design. As a modal band closes, there results a quasi-degenerate state?this state is remarkable as it is possible to transit to it by parametric and material choice as shown in this proposal. It is possible to dither dynamically around this point with band-edge transitions into and out of the BIC dispersion branch. There are associated modulation and tuning possibilities. Using semianalytical and rigorous mathematical methods, we will characterize band flips and BICs relative to lattice harmonic content as this has great effect on the band properties. We will study BIC-generated passbands under leaky-mode band flips for the various mode bands. Moreover, we can implement band flips using double resonance structures with paired leaky-mode devices. When the devices are close to each other, the resonance bands interact via evanescent-wave coupling. This configuration possesses additional interference effects along with the band-transition and BIC properties of the simpler embodiments. Electrically induced coupling in and out of the bound continuum states might be possible. The new band-flip concept proposed here is unexplored with high potential impact in various branches of photonics along with exciting possibilities for new scientific discoveries.This award reflects NSF's statutory mission and has been deemed worthy of support through evaluation using the Foundation's intellectual merit and broader impacts review criteria.

摘要标题：漏模共振光子晶格中的能带翻转和束缚态光子晶格是由不同折射率的材料组成的周期性结构。它类似于熟悉的具有规则原子排列的晶格。光子晶格有效地反射、过滤和重定向入射光。超材料构成了一类新的光子晶格，其中主要的性能指标是由一组亚波长粒子的性质控制的。周期性和非周期性的元表面和元聚集体可以被塑造成以极其紧凑的格式提供复杂的功能，甚至作为单层lms。无损耗介电介质对于高效率应用特别有希望。因此，人们对探索超材料作为高性能光子器件（包括超透镜、完美反射器和新型全息图）的构建块有着极大的兴趣。在这里，我们建议在纳米光子共振系统中展示新的基本效应，这些效应与光谱连续体中的渐进束缚态有关。该项目产生的新认识可能会带来控制光线的创新方法。该项目为本科生和研究生提供了出色的分析和实验经验，从而支持光子技术下一代劳动力的发展。如果成功，该项目将带来具有巨大经济效益和社会价值的创新光学工程理念。技术部分本研究的目的是对漏模光子晶格中的能带翻转进行研究。它们与非泄漏光子态或连续介质中的束缚态（BIC）的联系引起了人们极大的兴趣。我们寻求这些能带翻转和相关的束缚态跃迁的坚实的物理理解，并建议用概念验证原型实验证明它们。这些元素将被塑造成纳米复合材料中的周期性纳米结构，纳米压印光刻允许完美控制空间调制，谐波含量和光谱线宽。我们调查这些设备中的共振相互作用的基本方面。详细的光谱特性，包括能带结构将被测量。因此，我们将处理光子薄膜晶格支持共振漏模。它们的特性包括多功能光谱、偏振效应、具有强局部场的大量共振Q因子和相位控制。如果晶格是对称的，则对于每个所支持的谐振模式，带结构是唯一的，支持泄漏边缘和非泄漏边缘。非泄漏边缘与连续体中的束缚态（BIC）或嵌入本征值相关，目前具有很大的科学意义。可以通过晶格设计来控制漏带隙的宽度。当一个能带关闭时，会产生一个准简并态。这种状态是值得注意的，因为可以通过如该建议中所示的参数和材料选择来过渡到这种状态。可以围绕该点动态抖动，其中带边缘过渡进入和离开BIC色散分支。有相关的调制和调谐的可能性。使用半解析和严格的数学方法，我们将表征能带翻转和BIC相对于晶格谐波含量，因为这对能带性质有很大的影响。我们将研究BIC产生的通带下的泄漏模式带翻转的各种模式带。此外，我们可以实现带翻转使用双谐振结构与成对的漏模器件。当器件彼此靠近时，谐振带通过倏逝波耦合相互作用。该配置具有附加的干涉效应沿着较简单实施例的带跃迁和BIC特性。束缚连续态内外的电诱导耦合是可能的。该奖项反映了NSF的法定使命，并通过使用基金会的知识价值和更广泛的影响评审标准进行评估，被认为值得支持。

项目成果

Resonance properties of isolated-particle optical lattices: Antireflection-quenched Mie scattering and Mie modal memory

• DOI: 10.1117/12.2607963
• 发表时间: 2022-03
• 作者: R. Magnusson;Y. Ko;Nasrin Razmjooei;F. A. Simlan;Hafez Hemmati

Multimode experimental band dynamics of resonant nanophotonic lattices

共振纳米光子晶格的多模实验能带动力学

• DOI: 10.1364/oe.495835
• 发表时间: 2023
• 期刊: Optics Express
• 影响因子: 3.8
• 作者: Razmjooei, Nasrin;Magnusson, Robert
• 通讯作者: Magnusson, Robert

Properties of resonant photonic lattices: Bloch mode dynamics, band flips, and applications

• DOI: 10.1117/12.2547322
• 发表时间: 2020-02
• 作者: R. Magnusson;K. Lee;Hafez Hemmati;Pawarat Bootpakdeetam;Jonathan Vasilyev;F. A. Simlan;Nasrin Razmjooei;Y. Ko;Shanwen Zhang;Sun-Goo Lee;H. Svavarsson

Resonant reflection by microsphere arrays with AR-quenched Mie scattering

• DOI: 10.1364/oe.427982
• 发表时间: 2021-06-07
• 期刊: OPTICS EXPRESS
• 影响因子: 3.8
• 作者: Razmjooei, Nasrin;Ko, Yeong Hwan;Magnusson, Robert
• 通讯作者: Magnusson, Robert

Properties and principles of resonant optical lattices

共振光学晶格的性质和原理

• DOI: 10.1109/rapid54472.2022.9911562
• 发表时间: 2022
• 期刊: IEEE
• 作者: Magnusson, Robert;Ko, Yeong Hwan;Razmjooei, Nasrin;Lee, Kyu Jin;Abdullah Simlan, Fairooz;Chen, Ren-Jie;Buchanan-Vega, Joseph;Bootpakdeetam, Pawarat;Gupta, Neelam
• 通讯作者: Gupta, Neelam