Abstract
Plasmonic nanocavity is a novel platform to investigate fundamental light-matter interactions. In such a cavity, the working media are localized or propagating surface plasmons, which are transverse magnetic polarized electromagnetic waves forming at a metal/dielectric interface. Therefore, the carrier dynamics and optical properties of a plasmonic nanocavity are strongly dependent on the polarization matching between the comprising emitter and the plasmonic cavity modes. Here we demonstrate a plasmonic nanocavity with an InGaN/GaN multi-quantum well emitter, fabricated by cost-effective post-growth approaches from a commercially available epiwafer. The polarization state of the emission light from the single nanorod is the same as that of plasmonic cavity mode. As a consequent, significantly enhanced optical properties of the plasmonic nanocavity has been observed, confirmed by time-resolved and power-dependent micro-photoluminescence measurements. This work provides a promising insight into the study on light-matter interaction in a plasmonic nanocavity.
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