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Standing Waves in a Cavity

Standing Waves in a Cavity

A household microwave and lasers are examples of standing electromagnetic waves in a cavity. When two conducting metal plates are placed parallel at the nodal planes, it creates a cavity where standing waves are formed. The cavity between the two planes is analogous to a stretched string held at the points x = 0 and x = L. Here, the distance 'L' between the two planes must be an integer multiple of half of the wavelength. The wavelengths that satisfy this condition are given by:

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

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Dielectric-loaded surface plasmon polariton crossing waveguides using multimode interference.

M Ota, M Fukuhara, A Sumimura

|September 23, 2015

Summary

This summary is machine-generated.

This study presents a novel dielectric-loaded surface plasmon polariton waveguide (DLSPPW) crossing design. The optimized design achieves low insertion loss and crosstalk, advancing plasmonic device miniaturization.

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Area of Science:

Photonics and Nanophotonics
Plasmonics
Optical Waveguides

Background:

Dielectric-loaded surface plasmon polariton waveguides (DLSPPWs) offer strong field confinement and low propagation losses.
Efficient optical signal routing in plasmonic circuits requires low-loss, low-crosstalk crossing designs.
Existing crossing designs often suffer from high insertion loss and crosstalk, limiting device integration.

Purpose of the Study:

To design and demonstrate a low-loss, low-crosstalk multimode interference (MMI) crossing for DLSPPWs.
To numerically and experimentally validate the performance of the proposed MMI crossing structure.
To enable miniaturization and flexible optical interconnection in plasmonic devices.

Main Methods:

Numerical simulation of MMI crossing designs within SiO2 stripes on Au films (DLSPPWs).
Experimental fabrication and characterization of the proposed MMI crossing structure.
Utilizing tilted mirror-imaged MMI structures for enhanced performance.

Main Results:

Achieved a numerical insertion loss of 0.65 dB at a 10° crossing angle.
Confirmed numerical crosstalk of -20.27 dB for the MMI crossing.
Experimental validation confirmed low insertion losses, consistent with numerical predictions.

Conclusions:

The developed MMI crossing design significantly reduces insertion loss and crosstalk in DLSPPWs.
This design is crucial for the advancement of compact and integrated plasmonic circuits.
The proposed structure facilitates flexible patterning and miniaturization of optical interconnections for future photonic devices.