Multi-layered tungsten disulfide (WS 2 ) coated silicon/silica (Si/SiO 2 ) substrate and SiO 2 micro-bottle resonators (MBRs) have been prepared by van der Waals epitaxy method. Raman spectra of WS 2 -coated MBR show that the out-of-plane Raman mode is sensitive to the polarization of the excitation laser. The quality factor ( Q ) values of the whispering gallery modes (WGMs) in the transmission spectrum of an MBR decrease by 2 orders of magnitude on coating with WS 2 . On coating, a cleaner spectrum is obtained along with a concomitant effect of decrease in the number of lossy modes. Fano resonances as well as Autler-Townes splitting (ATS) was observed for the WGMs in the cleaned transmission spectrum. From the simulations it has been verified that the scattered electric field of the WS 2 flakes contributes to the observation of the Fano resonances and ATS in the coated MBR spectra.

中文翻译：

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涂覆几层WS 2对微瓶共振器的拉曼光谱和耳语画廊模式的影响

采用范德华外延法制备了多层二硫化钨（WS 2）包覆的硅/二氧化硅（Si / SiO 2）衬底和SiO 2微瓶共振器（MBR）。WS 2涂层MBR的拉曼光谱表明，面外拉曼模式对激发激光的偏振敏感。在使用WS 2涂层的情况下，MBR透射光谱中的回音壁模式（WGM）的品质因数（Q）值降低了2个数量级。在涂层上，可获得更清晰的光谱以及伴随的有损模数减少的效果。在清洁的透射光谱中观察到了WGM的法诺共振和Autler-Townes分裂（ATS）。