Finite-difference time-domain methods
Finite-difference time-domain methods
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DOI：
10.1038/s43586-023-00257-4
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发表时间：
2023-10-05
期刊：
影响因子：
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通讯作者：
Simpson，J. J.
中科院分区：
文献类型：
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作者：
Teixeira，F. L.;Sarris，C.;Simpson，J. J.
时域有限差分法（FDTD）是一种广泛应用于复杂介质中电磁场全波分析和详细几何分析的数值工具。时域有限差分法的应用涵盖了一系列的时间和空间尺度，从亚原子到星系的长度，从经典到量子物理。受益于时域有限差分法的技术领域包括：生物医学-生物成像、生物光子学、生物电子学和生物传感器;生物物理学-遥感、通信、空间气象灾害和地理定位;超材料-亚波长聚焦透镜、电磁隐身罩和连续扫描漏波天线;光学-衍射光学元件、光子带隙结构、光子晶体波导和环形谐振器装置;等离子激元-等离子激元波导和天线;以及量子应用-量子器件和量子雷达。本书总结了时域有限差分法的主要特点，沿着关键的扩展，使不同的研究问题得到精确的解决方案。此外，硬件的考虑进行了讨论，加上如何提取的幅度和相位数据，布里渊图和散射参数的FDTD模型的输出的例子。本书最后讨论了在当前和未来应用中进一步增强FDTD方法的挑战和机遇。
The finite-difference time-domain (FDTD) method is a widespread numerical tool for full-wave analysis of electromagnetic fields in complex media and for detailed geometries. Applications of the FDTD method cover a range of time and spatial scales, extending from subatomic to galactic lengths and from classical to quantum physics. Technology areas that benefit from the FDTD method include biomedicine — bioimaging, biophotonics, bioelectronics and biosensors; geophysics — remote sensing, communications, space weather hazards and geolocation; metamaterials — sub-wavelength focusing lenses, electromagnetic cloaks and continuously scanning leaky-wave antennas; optics — diffractive optical elements, photonic bandgap structures, photonic crystal waveguides and ring-resonator devices; plasmonics — plasmonic waveguides and antennas; and quantum applications — quantum devices and quantum radar. This Primer summarizes the main features of the FDTD method, along with key extensions that enable accurate solutions to be obtained for different research questions. Additionally, hardware considerations are discussed, plus examples of how to extract magnitude and phase data, Brillouin diagrams and scattering parameters from the output of an FDTD model. The Primer ends with a discussion of ongoing challenges and opportunities to further enhance the FDTD method for current and future applications.