Orientation-Controlled 2D Anisotropic and Isotropic Photon Transport in Co-crystal Polymorph Microplates
Orientation-Controlled 2D Anisotropic and Isotropic Photon Transport in Co-crystal Polymorph Microplates
复制标题
共晶多晶型微板中方向控制的二维各向异性和各向同性光子传输
DOI：
10.1002/anie.201913441
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发表时间：
2020-01-29
影响因子：
16.6
通讯作者：
Zhao, Yong Sheng
中科院分区：
文献类型：
--
作者：
Liu, Yong;Hu, Huiping;Zhao, Yong Sheng
光子/电子的二维各向异性输运对于构建超紧凑的片上电路至关重要。迄今为止，光子在有机二维晶体中的传播通常表现为各向同性，而各向异性行为尚未得到充分的证实。现在，提出了一种取向控制的光子-偶极相互作用策略，以合理地实现各向异性和各向同性的二维光子输运在两个共晶多晶微板。单斜微板在二维平面上采用近水平的跃迁偶极矩（TDM）取向，表现出各向异性的光子-偶极子相互作用，因此在不同的二维方向上具有不同的再吸收波导损耗。相比之下，具有垂直TDM取向的三斜晶系板显示出2D各向同性光子-偶极相互作用，因此沿沿着不同方向具有相同的再吸收损耗。基于这种各向异性，设计了一种定向信号输出耦合器，实现了真实的信号的定向传输。
2D anisotropic transport of photons/electrons is crucial for constructing ultracompact on-chip circuits. To date, the photons in organic 2D crystals usually exhibit the isotropic propagation, and the anisotropic behaviors have not yet been fully demonstrated. Now, an orientation-controlled photon-dipole interaction strategy was proposed to rationally realize the anisotropic and isotropic 2D photon transport in two co-crystal polymorph microplates. The monoclinic microplate adopts a nearly horizontal transition dipole moment (TDM) orientation in 2D plane, exhibiting anisotropic photon-dipole interactions and thus distinct re-absorption waveguide losses for different 2D directions. By contrast, the triclinic plate with a vertical TDM orientation, shows 2D isotropic photon-dipole interactions and thus the same re-absorption losses along different directions. Based on this anisotropy, a directional signal outcoupler was designed for the directional transmission of the real signals.