Title: Plasmonic gap-mode nanocavities with metallic mirrors in high-index cladding
Authors: Cheng, Pi-Ju
Weng, Chen-Ya
Chang, Shu-Wei
Lin, Tzy-Rong
Tien, Chung-Hao
Department of Photonics
Issue Date: 3-Jun-2013
Abstract: 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 mu m, the quality factor is about 150, and the threshold gain is lower than 1500 cm(-1). (C) 2013 Optical Society of America
URI: http://dx.doi.org/10.1364/OE.21.013479
ISSN: 1094-4087
DOI: 10.1364/OE.21.013479
Volume: 21
Issue: 11
Begin Page: 13479
End Page: 13491
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