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A plasmonic splitter based on slot cavity.

Yinghui Guo¹, Lianshan Yan, Wei Pan

¹Center for Information Photonics & Communications, School of Information Science & Technology, Southwest Jiaotong University, Chengdu, Sichuan 610031, China.

|September 22, 2011

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This study introduces a novel plasmonic splitter using a slot cavity. The device can function as both a frequency and power splitter by adjusting waveguide positions and coupling parameters.

Area of Science:

Photonics and Plasmonics
Nanophotonics
Optical Devices

Background:

Plasmonic devices offer miniaturization and unique light-matter interaction capabilities.
Efficient optical splitting is crucial for integrated photonic circuits and signal processing.
Slot cavities provide strong field confinement for enhanced plasmonic effects.

Purpose of the Study:

To propose and numerically investigate a novel plasmonic splitter based on a slot cavity.
To demonstrate the device's capability as both a frequency and power splitter.
To explore methods for achieving flexible output power ratios.

Main Methods:

Numerical investigation using the finite-difference-time-domain (FDTD) method.
Design and simulation of a plasmonic structure comprising an input waveguide, slot cavity, and output waveguides.

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Parametric study involving variations in output waveguide positions, coupling distance, and refractive index.

Main Results:

The proposed slot cavity structure successfully functions as a plasmonic splitter.
Both frequency splitting and power splitting functionalities were achieved by altering output waveguide configurations.
Flexible control over the output power ratio was demonstrated through adjustments in coupling distance and refractive index.

Conclusions:

The proposed plasmonic splitter based on a slot cavity is a versatile device for integrated photonics.
The design allows for tunable frequency and power splitting, offering flexibility in optical signal manipulation.
This work contributes to the development of advanced plasmonic components for optical communication and sensing applications.