机器学习的超宽带和带选择性热元发射器
Chengyu Xiao1,2, Mengqi Liu3,4, Kan Yao5
1State Key Laboratory of Metal Matrix Composites, School of Materials Science and Engineering, Shanghai Jiao Tong University, Shanghai, P. R. China.
Nature
|July 3, 2025
概括
机器学习现在设计了具有超宽带和选择性特性的先进热元发射器. 这种新方法克服了传统纳米光子设计的局限性,
科学领域:
- 纳米光子学
- 材料科学
- 机器学习
背景情况:
- 热纳米光学对于能源和信息技术至关重要.
- 热发射器的精确光谱工程受到试错方法的限制.
- 机器学习在纳米光子材料设计方面表现有前途.
研究的目的:
- 为设计高性能纳米光子发射器开发通用机器学习方法.
- 在热发射器中实现超宽带控制和精确的频段选择性.
- 克服传统设计方法的局限性,包括预定义的几何和局部优化陷.
主要方法:
- 用稀疏数据进行多参数优化的一种非传统的机器学习范式.
- 用于光谱定制的元结构和材料组合的反向设计.
- 一种用于设计三维 (3D) 元发射器的三平面建模方法,超越二维结构.
主要成果:
- 设计了大量的超宽带和带选择性热元发射器.
- 证明了双重设计能力:自动反向设计和3D发射器设计.
- 提出了七个概念验证元发射器,
结论:
- 通过扩大几何自由度和维度, 提出的框架可实现全球优化.
- 为3D纳米光子材料提供了可通用的制造框架.
- 这种方法超越了当前最先进的设计,并提供了一个全面的材料数据库.
相关概念视频
01:20Atomic Emission Spectroscopy: Overview
3.0K
Atomic emission spectroscopy (AES) is an analytical technique used to determine the elemental composition of a sample by analyzing the light emitted from excited atoms. In AES, atoms in a sample are excited to higher energy levels by thermal energy from high-temperature sources, such as plasma, arcs, or sparks. When these excited atoms return to lower energy states, they emit light at specific wavelengths characteristic of each element. The resulting atomic emission spectrum, which consists of...
3.0K
01:22Atomic Emission Spectroscopy: Instrumentation
1.5K
The instrumentation of atomic emission spectrometry (AES) involves various components, including atomization devices that convert samples into gas-phase atoms and ions. There are two main types of atomization devices: continuous and discrete atomizers. Continuous atomizers, like plasmas and flames, introduce samples in a constant stream, while discrete atomizers inject individual samples using syringes or autosamplers. The most common discrete atomizer is the electrothermal atomizer.
1.5K
01:26Inductively Coupled Plasma Atomic Emission Spectroscopy: Instrumentation
1.1K
Inductively coupled plasma (ICP) is the common plasma source used in atomic emission spectroscopy (AES), a technique that detects and analyzes various elements in a sample. This method is often called inductively coupled plasma atomic emission spectroscopy (ICP-AES).
There are three main types of inductively coupled plasma atomic emission spectroscopy (ICP-AES) instruments: sequential, simultaneous multichannel, and Fourier transform instruments, with the latter being less commonly used....
There are three main types of inductively coupled plasma atomic emission spectroscopy (ICP-AES) instruments: sequential, simultaneous multichannel, and Fourier transform instruments, with the latter being less commonly used....
1.1K
01:30Electronic Distance Measuring Instruments
771
Electronic Distance Measuring Instruments (EDMs) are essential tools in modern surveying, offering precise distance measurements by emitting electromagnetic signals and calculating the time required for these signals to travel to a target and return. Two primary types of signals are used in EDMs — light waves and microwaves — each suited to specific environmental and distance requirements. Light-wave-based EDMs utilize either infrared or laser light, providing high accuracy over...
771