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Updated: Jan 17, 2026

Fabricating van der Waals Heterostructures with Precise Rotational Alignment
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Fabricating van der Waals Heterostructures with Precise Rotational Alignment

Published on: July 5, 2019

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在基于拓绝缘体的范德瓦尔斯超材料中产生第二和第三波

Alessandra Di Gaspare1, Sara Ghayeb Zamharir1, Craig Knox2

  • 1NEST, CNR-NANO and Scuola Normale Superiore, 56127, Pisa, Italy.

Light, science & applications
|September 22, 2025
PubMed
概括

在拓绝缘器中首次实验证明了高阶波生成 (HHG). 这一突破通过利用独特的材料特性,解锁了新的太赫兹 (THz) 频率生成能力.

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A household microwave and lasers are examples of standing electromagnetic waves in a cavity. When two conducting metal plates are placed parallel at the nodal planes, it creates a cavity where standing waves are formed. The cavity between the two planes is analogous to a stretched string held at the points x = 0 and x = L. Here, the distance 'L' between the two planes must be an integer multiple of half of the wavelength. The wavelengths that satisfy this condition are given by:
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A close look at earthquakes provides evidence for the conditions appropriate for resonance, standing waves, and constructive and destructive interference. A building may vibrate for several seconds with a driving frequency matching the building's natural frequency of vibration; this produces a resonance that results in one building collapsing while the neighboring buildings do not. Often, buildings of a certain height are devastated, while other taller buildings remain intact. This...
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