研究目的
Investigating the characteristics of a vertical metal-insulator-metal (MIM) microring cavity for applications in nanoscale photonic integrated circuits and out-of-plane optical sensors.
研究成果
The designed vertical MIM plasmonic cavity supports various plasmonic modes with moderate quality factor and mode volume, and demonstrates highly concentrated emission of radiations in a vertical direction. This plasmonic cavity can be useful in ultracompact integrated photonic circuits as well as in out-of-plane device platforms.
研究不足
The plasmonic cavities are limitedly applicable to achieve both an efficient light extraction outside the plasmonic cavity and low-loss optical coupling to other photonic elements.
1：Experimental Design and Method Selection:
A full vectorial numerical simulation was used to characterize the fundamental optical properties of the transverse-magnetic-like plasmonic whispering-gallery-modes (WGMs) excited in a variety of MIM plasmonic cavities.
2：Sample Selection and Data Sources:
The study employed InGaAsP as a high-index semiconductor with an active gain medium and Ag as the plasmonic metal.
3：List of Experimental Equipment and Materials:
The refractive index of the InGaAsP microring was set to
4：4, and the Ag was described based on the Drude model. Experimental Procedures and Operational Workflow:
The spatial resolution and domain size in the simulation were 5 nm and
5：0 × 0 × 4 μm3, respectively. Perfectly matched layers were applied at the boundaries of the simulation domain. Data Analysis Methods:
The study calculated resonant wavelengths and quality factors for the WGMs excited in a variety of different microring cavities.
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