Hybrid Photon-Plasmon Coupling and Ultrafast Control of Nanoantennas on a Silicon Photonic Chip
Hybrid Photon-Plasmon Coupling and Ultrafast Control of Nanoantennas on a Silicon Photonic Chip
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DOI：
10.1021/acs.nanolett.7b04861
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发表时间：
2018-01-01
期刊：
影响因子：
10.8
通讯作者：
Muskens, Otto L.
中科院分区：
文献类型：
--
作者：
Chen, Bigeng;Bruck, Roman;Muskens, Otto L.
纳米等离子体器件与硅光子电路的混合集成有望在片上传感、场增强和非线性光谱以及集成纳米光子开关等领域得到广泛应用。在这里，我们通过将硅光子谐振器与等离子体纳米天线相结合，展示了一种新的光子-等离子体耦合机制。利用相干完美吸收原理，我们利用驻波光场来最大化光子-等离子体激元相互作用强度。宽带天线相对于窄带光子跑道模式的精确放置导致仅这些模式的子集的受控混合。通过将天线组合成相位相反的辐射偶极子组，可以有效抑制远场散射。我们实现了光子-等离子体杂化的超快调谐，包括两个输出端口之间驻波输入的可重构路由。混合光子-等离子体谐振器为片上集成纳米光子器件提供了概念上的新方法。
Hybrid integration of nanoplasmonic devices with silicon photonic circuits holds promise for a range of applications in on-chip sensing, field-enhanced and nonlinear spectroscopy, and integrated nanophotonic switches. Here, we demonstrate a new regime of photon-plasmon coupling by combining a silicon photonic resonator with plasmonic nanoantennas. Using principles from coherent perfect absorption, we make use of standing-wave light fields to maximize the photon-plasmon interaction strength. Precise placement of the broadband antennas with respect to the narrowband photonic racetrack modes results in controlled hybridization of only a subset of these modes. By combining antennas into groups of radiating dipoles with opposite phase, far-field scattering is effectively suppressed. We achieve ultrafast tuning of photon-plasmon hybridization including reconfigurable routing of the standing-wave input between two output ports. Hybrid photonic-plasmonic resonators provide conceptually new approaches for on-chip integrated nanophotonic devices.