透明度(行为)
电磁感应透明
材料科学
相(物质)
联轴节(管道)
凝聚态物理
表面等离子体子
作者
Rohan D. Kekatpure,Edward S. Barnard,Wenshan Cai,Mark L. Brongersma
标识
DOI:10.1103/physrevlett.104.243902
摘要
We demonstrate the existence of electromagnetically-induced-transparency (EIT-)like spectral response in a system of nanoscale plasmonic resonator antennas coupled by means of a single-mode silicon waveguide. Our proposed scheme exploits the phase of the coupling between the antennas in contrast with the existing plasmonic approaches that rely on the strength of direct, near-field coupling of nanometallic elements. Quality factors of over 100 and group indices of over 10 are readily achieved at near-infrared frequencies by a single unit in $\ensuremath{\approx}1\text{ }\text{ }\ensuremath{\mu}{\mathrm{m}}^{2}$ of total device footprint, representing a more than two orders size reduction over corresponding dielectric EIT structures. By obviating the need for a near-field interaction, the phase-coupling scheme also facilitates an improved access to the coupling medium between the resonators thereby paving the way toward dynamic control of their sharp EIT-like spectral response.
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