Monolayer Excitonic Emission for Imaging Spatial Dispersion of Photonic Crystals
Monolayer Excitonic Emission for Imaging Spatial Dispersion of Photonic Crystals
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DOI：
10.1021/acsphotonics.9b00820
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发表时间：
2019-09-01
期刊：
影响因子：
7
通讯作者：
Cubukcu, Ertugrul
中科院分区：
文献类型：
--
作者：
Huang, Wenzhuo;De-Eknamkul, Chawina;Cubukcu, Ertugrul
光子晶体的空间色散表现为角度相关的光学响应。在这里，我们使用新兴的二维过渡金属二硫属化物（TMDC）作为光子源，直接在倒易空间中的空间色散图像。激子发射从单层二硫化钼耦合到离域的Fano共振支持的光子晶体板，重建在远场的iscrystal轮廓。这种单层TMDC与光子晶体的结合不仅揭示了光子晶体的能带结构，而且为实现可控和定向的激子光源提供了一条新的途径。
Spatial dispersion of a photonic crystal manifests itself as an angle dependent optical response. Here, we use the emerging two-dimensional transition metal dichalcogenides (TMDCs) as a photon source to directly image the spatial dispersion in the reciprocal space. Excitonic emission from a monolayer MoS2 is coupled to the delocalized Fano resonances supported by the photonic crystal slab, recreating isofrequency contours in the far-field. This integration of monolayer TMDCs and photonic crystal not only reveals the band structure of a photonic crystal but also provides a new route to controllable and directional excitonic light sources.