论文标题
具有超压缩模式体积的单石墨烯等离子腔的远场激发
Far-field Excitation of Single Graphene Plasmon Cavities with Ultra-compressed Mode-volumes
论文作者
论文摘要
原声 - 磷酸质量（AGP）是高度密封的电磁模式，在中红外/Terahertz光谱中具有较大的动量和低损失。由于它们能够将光限制在极小尺寸的能力上，因此在这种长波长状态下，它们具有极大的潜力，可以在分子指纹居住的长波长中进行超强的光肌相互作用。但是，到目前为止，AGP一直限于微观尺度区域，从而减少了几个刻板级的限制潜力。在这里，通过利用一种新型的基于石墨烯的磁性谐振，我们认识到单个纳米尺度的AGP腔，达到了$ \ thumsim5 \ cdot10^{ - 10} $的破纪录模式 - 量限制因子。该AGP腔充当中红外的纳米反丹纳，它在远场有效地激发，并在超宽带光谱上进行电诱导。我们的方法提供了一个新的平台，用于研究超强耦合现象，例如通过振动式耦合进行化学操作，以及在这个充满挑战的频谱范围内的有效探测器和传感器的途径。
Acoustic-graphene-plasmons (AGPs) are highly confined electromagnetic modes, carrying large momentum and low loss in the mid-infrared/Terahertz spectra. Owing to their ability to confine light to extremely small dimensions, they bear great potential for ultra-strong light-matter interactions in this long wavelength regime, where molecular fingerprints reside. However, until now AGPs have been restricted to micron-scale areas, reducing their confinement potential by several orders-of-magnitude. Here, by utilizing a new type of graphene-based magnetic-resonance, we realize single, nanometric-scale AGP cavities, reaching record-breaking mode-volume confinement factors of $\thicksim5\cdot10^{-10}$. This AGP cavity acts as a mid-infrared nanoantenna, which is efficiently excited from the far-field, and electrically tuneble over an ultra-broadband spectrum. Our approach provides a new platform for studying ultra-strong-coupling phenomena, such as chemical manipulation via vibrational-strong-coupling, and a path to efficient detectors and sensors, in this challenging spectral range.
