Deterministic Yet Flexible Directional Light Emission from Spiral Nanomembrane Cavities
Deterministic Yet Flexible Directional Light Emission from Spiral Nanomembrane Cavities
复制标题
螺旋纳米膜腔的确定性但灵活的定向光发射
DOI：
10.1021/acsphotonics.9b00992
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发表时间：
2019-10-01
期刊：
影响因子：
7
通讯作者：
Schmidt, Oliver G.
中科院分区：
文献类型：
--
作者：
Wang, Jiawei;Yin, Yin;Schmidt, Oliver G.
控制微/纳米结构发射的光的流动对于片上有源光子器件及其巨大的应用至关重要。尽管先前的报告集中于改善沿着固定角度的方向性，但是对于同时操纵具有不同性质的多个光流（例如，波长、偏振和波矢量），这为新兴的二维半和三维（3D）集成光子技术铺平了道路。在这里，我们提出了自卷起的纳米膜为基础的非对称腔与故意控制的螺旋形状，并展示了3D定向光发射。3D受限的光学共振和螺旋纳米膜边缘之间的相互作用导致确定性但可调谐的发射方向。通过调节腔限制和模式手征性，揭示了偏振选择方向性以及双向和单向发射机制之间的转变。具有可调结构不对称性的螺旋纳米膜腔为手性光-物质相互作用和操纵多路复用经典和量子光源的光发射提供了新的见解。
Controlling the flow of light emitted from structures in micro/nanoscale is crucial for on-chip active photonic devices and their tremendous applications. Although previous reports focus on improving the directionality along a fixed angle, the realization of flexible directional emission becomes highly desired for simultaneously manipulating multiple light flows with different properties (e.g., wavelength, polarization, and wavevector), which paves the way to emerging two and one-half dimensional and three-dimensional (3D) integrated photonics technologies. Here, we propose self-rolled-up nanomembrane-based asymmetric cavities with a deliberately controlled spiral shape and demonstrate 3D directional light emissions. The interaction between 3D confined optical resonances and a spiral nanomembrane edge results in deterministic yet tunable emission directions. Polarization-selective directionality as well as the transition between bi- and unidirectional emission regimes is revealed by adjusting the cavity confinement and mode chirality. The spiral nanomembrane cavities featuring adjustable structural asymmetry provide new insights into chiral light-matter interaction and manipulating light emission for multiplexed classical and quantum light sources.