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Determination of the Excitation and Coupling Rates Between Light Emitters and Surface Plasmon Polaritons

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Published on: July 21, 2018

Propagation-Invariant Space-Time Plasmonic Pulse in Subwavelength MIM Waveguide.

Eui-Soo Cho¹, Seung-Yeol Lee¹

¹School of Electronic and Electrical Engineering, College of IT Engineering, Kyungpook National University, Daegu 41566, Republic of Korea.

Nanomaterials (Basel, Switzerland)

|March 12, 2024

Summary

This summary is machine-generated.

Space-time wave packets overcome limitations in metal-insulator-metal plasmonic waveguides. This innovation enhances propagation length and transverse confinement for surface plasmon polaritons (SPPs).

Keywords:

diffraction-free beams metal-insulator-metal plasmonic waveguide propagation-invariant wave packets space–time wave packets surface plasmon polaritons

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Area of Science:

Photonics
Plasmonics
Waveguide technology

Background:

Metal-insulator-metal (MIM) plasmonic waveguides are crucial for subwavelength confinement of surface plasmon polaritons (SPPs).
Traditional MIM waveguides suffer from short propagation lengths and unbounded transverse fields, limiting their practical applications.

Purpose of the Study:

To synthesize diffraction- and dispersion-free MIM modes using space-time wave packets (STWPs).
To enhance the performance of MIM plasmonic waveguides for advanced photonic applications.

Main Methods:

Utilizing space-time wave packets (STWPs) to create novel space-time MIM (ST-MIM) waveguide modes.
Simulating and comparing the propagation characteristics of ST-MIM modes against conventional Gaussian pulses.

Main Results:

ST-MIM modes exhibit significantly enhanced propagation lengths: approximately 2.4 times for symmetric modes and 6.3 times for antisymmetric modes compared to Gaussian pulses.
ST-MIMs demonstrate confinement in all transverse dimensions, overcoming traditional diffraction limits.
Arbitrary design of ST-MIM group velocities allows for synchronization of symmetric and antisymmetric mode propagation speeds.

Conclusions:

Space-time wave packets offer a powerful method to overcome inherent limitations of MIM plasmonic waveguides.
ST-MIM waveguide modes present a promising platform for enhanced light confinement and propagation control at the nanoscale.
The ability to tailor group velocities opens new avenues for controlling and synchronizing plasmonic signals.