Emergent Fabry–Pérot Interference for Light–Matter Interaction in van der Waals WS2/SiP2 Heterostructures
Emergent Fabry–Pérot Interference for Light–Matter Interaction in van der Waals WS2/SiP2 Heterostructures
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范德华 WS2/SiP2 异质结构中光的涌现法布里·佩罗干涉·物质相互作用
DOI：
10.1021/acsami.1c22768
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发表时间：
2022
期刊：
影响因子：
--
通讯作者：
Hongtao Yuan
中科院分区：
文献类型：
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作者：
Xiaojun Sun;Feng Qin;Junwei Huang;Ling Zhou;Zeya Li;Xiangyu Bi;Lingyi Ao;Siyu Duan;Fanghua Cheng;Caiyu Qiu;Yangfan Lu;Hong Lu;Huiyang Gou;Hongtao Yuan
法布里-珀罗干涉在调制源于光-物质相互作用的光学响应的光谱强度方面起着重要作用。这种干涉发生在基板作为谐振腔的例子已经被证明和探测的二维层状材料。类似地，法布里-珀罗干涉可以发生并调制异质结构中的光学响应;然而，这仍然是难以捉摸的。在此，我们通过改变单层WS 2/SiP 2异质结构底部SiP 2的厚度（从2 nm到193 nm），观察到Fabry-Pe <$rot干涉对光致发光（PL）和拉曼光谱的影响。当SiP 2厚度为75 nm时，WS 2/SiP 2异质结构的PL谱和E2 g1拉曼模式的强度首先下降到几乎为零，同时显示出干涉增加。我们的研究结果清楚地证明了异质结构光学响应中的法布里-珀罗干涉，为优化光学响应提供了关键信息，并为光电探测器应用铺平了道路。
Fabry–Pérot interference plays an important role in modulating the spectral intensity of optical response originating from light–matter interactions. Examples of such interference occurring in the substrate as the resonating cavity have been demonstrated and probed by two-dimensional layered materials. Similarly, the Fabry–Pérot interference can occur and modulate the optical response in the heterostructure; however, this remains elusive. Herein, we observe the Fabry–Pérot interference on photoluminescence (PL) and Raman spectra in monolayer WS2/SiP2heterostructures by varying the thickness of bottom SiP2from 2 to 193 nm, which serves as the Fabry–Pérot cavity. Both the intensities of the PL spectra and the E2g1Raman mode of WS2/SiP2heterostructures first decrease to almost zero while displaying an interference increase at a SiP2thickness of 75 nm. Our findings clearly demonstrate the Fabry–Pérot interference in the optical response of heterostructures, providing crucial information to optimize the optical response and paving the way toward photodetector applications.