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Related Experiment Video

Updated: Jun 22, 2026

Cross-Modal Multivariate Pattern Analysis

Cross-Modal Multivariate Pattern Analysis

Published on: November 9, 2011

Microcavities based on multimodal interference.

Björn Maes¹, Mihai Ibanescu, John D Joannopoulos

¹Dept. of Physics, Center for Materials Science and Engineering, Research Laboratory of Electronics, Massachusetts Institute of Technology, 77 Massachusetts Avenue, Cambridge 02139, Massachusetts, USA. bjorn.maes@ugent.be

|June 24, 2009

Summary

This summary is machine-generated.

We reveal complex cavity modes in waveguide devices using mode interference. Strong mode coupling enhances high quality factors, crucial for advanced optical devices.

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Area of Science:

Optics and Photonics
Waveguide Technology
Quantum Optics

Background:

Waveguide devices with multiple guided modes exhibit complex optical phenomena.
Understanding cavity mode structures is essential for designing efficient optical components.

Purpose of the Study:

To describe intricate cavity mode structures in waveguide devices with two or more guided modes.
To elucidate the role of mode interference and coupling in achieving high quality factors.

Main Methods:

Analysis of interference between scattered fields of different modes at device facets.
Investigation of mode coupling, particularly around zero group velocity points.
Development of a general semi-analytical expression for cavity parameters.
Validation through extensive numerical calculations.

Main Results:

Demonstration of multipole or mode cancellations due to scattered field interference.
Identification of strong mode coupling as a key factor for high quality factors.
Characterization of the mechanism in cylindrical structures (with and without negative group velocity) and surface plasmon devices.

Conclusions:

Intricate cavity mode structures can be engineered in multi-mode waveguide devices.
Mode interference and strong coupling are critical for enhancing cavity quality factors.
The presented semi-analytical model provides a general framework for understanding these phenomena.