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Measurement of Scattering Nonlinearities from a Single Plasmonic Nanoparticle

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The case for using gap plasmon-polaritons in second-order optical nonlinear processes.

Jacob B Khurgin¹, Greg Sun

¹Department of Electrical & Computer Engineering, Johns Hopkins University, Baltimore, MD 21218, USA.

|December 25, 2012

Summary

This summary is machine-generated.

Metal-insulator-metal waveguides enable efficient second-order nonlinear optics in semiconductors by providing optical confinement and phase-matching. This allows for compact devices despite metal losses, utilizing large nonlinear susceptibilities.

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Area of Science:

Photonics
Materials Science
Optoelectronics

Background:

Second-order nonlinear optical processes are crucial for frequency conversion and optical modulation.
Traditional nonlinear optical devices often require bulky phase-matching structures and struggle with weak nonlinearities in many materials.
Metal-insulator-metal (MIM) waveguides offer unique optical properties for miniaturized photonic devices.

Purpose of the Study:

To investigate the potential of metal-insulator-metal (MIM) waveguides for enhancing second-order nonlinear optical processes.
To leverage the inherent anisotropy of MIM structures for efficient phase-matching.
To explore the use of large nonlinear susceptibilities in cubic zinc blende semiconductors within MIM waveguides.

Main Methods:

Theoretical analysis of light propagation in MIM waveguides.
Modeling of second-order nonlinear optical effects, including frequency mixing and harmonic generation.
Estimation of device efficiency considering optical confinement, phase-matching, and material nonlinearities.

Main Results:

MIM waveguides provide significant optical confinement, enhancing nonlinear interactions.
The inherent anisotropy of MIM structures effectively facilitates phase-matching for nonlinear processes.
Large nonlinear susceptibilities of zinc blende semiconductors can be accessed and utilized.
Infra-red radiation propagates in surface-plasmon-polariton (SPP) modes, with metal losses being a factor but not prohibitive.

Conclusions:

MIM waveguides are a promising platform for compact and efficient second-order nonlinear optical devices.
The combination of tight confinement, phase-matching, and large material nonlinearities overcomes previous limitations.
Further development could lead to integration-friendly semiconductor-based nonlinear photonic devices.