Plasmonic gap-mode nanocavities with metallic mirrors in high-index cladding

Pi Ju Cheng, Chen Yaweng, Shu Wei Chang, Tzy Rong Lin, Chung-Hao Tien

研究成果: Article同行評審

11 引文 斯高帕斯(Scopus)

摘要

We theoretically analyze plasmonic gap-mode nanocavities covered by a thick cladding layer at telecommunication wavelengths. In the presence of high-index cladding materials such as semiconductors, the first-order hybrid gap mode becomes more promising for lasing than the fundamental one. Still, the significant mirror loss remains the main challenge to lasing. Using silver coatings within a decent thickness range at two end facets, we show that the reflectivity is substantially enhanced above 95 %. At a coating thickness of 50 nm and cavity length of 1.51 mm, the quality factor is about 150, and the threshold gain is lower than 1500 cm-1.

原文English
頁(從 - 到)13479-13491
頁數13
期刊Optics Express
21
發行號11
DOIs
出版狀態Published - 3 六月 2013

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