极性器件的逆向设计

IF 3.5 2区 物理与天体物理 Q2 PHYSICS, APPLIED
Oliver Kuster, Yannick Augenstein, Carsten Rockstuhl, Thomas Jebb Sturges
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引用次数: 0

摘要

极化子产生于微腔内激子和光子之间的强耦合,有望用于光电和全光设备。极化子已被应用于多个领域,包括低阈值激光器和量子信息处理。为了实现复杂的功能,需要对偏振器件进行非直观的设计。在本文中,我们使用有限差分时域模拟以可微分方式编写的耗散性格罗斯-皮塔耶夫斯基方程,并将其与邻接公式相结合。通过这种方法,我们可以利用拓扑优化来设计极化子凝聚体所经历的电势景观,从而按需定制其特性。势能直接转化为功能器件的蓝图,各种制造和光学控制技术可以在实验中实现它。我们反向设计了一系列极化子器件,即在空间上将极化子塑造成平顶分布的结构、聚焦极化子的金属膜和非线性激活隔离器。在采用最小特征尺寸和电势离散化等现实制造限制条件时,这些功能得以保留。我们的研究结果证明了反向设计技术在极化子器件中的实用性,为未来研究优化具有复杂光物质相互作用的系统提供了基石。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Inverse design of polaritonic devices
Polaritons, arising from the strong coupling between excitons and photons within microcavities, hold promise for optoelectronic and all-optical devices. They have found applications in various domains, including low-threshold lasers and quantum information processing. To realize complex functionalities, non-intuitive designs for polaritonic devices are required. In this contribution, we use finite-difference time-domain simulations of the dissipative Gross–Pitaevskii equation, written in a differentiable manner, and combine it with an adjoint formulation. Such a method allows us to use topology optimization to engineer the potential landscape experienced by polariton condensates to tailor its characteristics on demand. The potential directly translates to a blueprint for a functional device, and various fabrication and optical control techniques can experimentally realize it. We inverse-design a selection of polaritonic devices, i.e., a structure that spatially shapes the polaritons into a flat-top distribution, a metalens that focuses a polariton, and a nonlinearly activated isolator. The functionalities are preserved when employing realistic fabrication constraints such as minimum feature size and discretization of the potential. Our results demonstrate the utility of inverse design techniques for polaritonic devices, providing a stepping stone toward future research in optimizing systems with complex light–matter interactions.
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来源期刊
Applied Physics Letters
Applied Physics Letters 物理-物理:应用
CiteScore
6.40
自引率
10.00%
发文量
1821
审稿时长
1.6 months
期刊介绍: Applied Physics Letters (APL) features concise, up-to-date reports on significant new findings in applied physics. Emphasizing rapid dissemination of key data and new physical insights, APL offers prompt publication of new experimental and theoretical papers reporting applications of physics phenomena to all branches of science, engineering, and modern technology. In addition to regular articles, the journal also publishes invited Fast Track, Perspectives, and in-depth Editorials which report on cutting-edge areas in applied physics. APL Perspectives are forward-looking invited letters which highlight recent developments or discoveries. Emphasis is placed on very recent developments, potentially disruptive technologies, open questions and possible solutions. They also include a mini-roadmap detailing where the community should direct efforts in order for the phenomena to be viable for application and the challenges associated with meeting that performance threshold. Perspectives are characterized by personal viewpoints and opinions of recognized experts in the field. Fast Track articles are invited original research articles that report results that are particularly novel and important or provide a significant advancement in an emerging field. Because of the urgency and scientific importance of the work, the peer review process is accelerated. If, during the review process, it becomes apparent that the paper does not meet the Fast Track criterion, it is returned to a normal track.
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