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Spectral and Angle-Resolved Magneto-Optical Characterization of Photonic Nanostructures

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Side-coupled liquid sensor and its array with magneto-optical photonic crystal.

Aoqian Shi, Rui Ge, Jianjun Liu

Journal of the Optical Society of America. A, Optics, Image Science, and Vision

|August 5, 2020

Summary

This study introduces a novel magneto-optical photonic crystal sensor array for liquid detection. The proposed sensor demonstrates robust performance and high sensitivity, offering a valuable reference for advanced sensor design.

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Area of Science:

Photonics
Optical Sensing
Materials Science

Background:

Photonic crystal microcavities are crucial for sensing applications.
Magneto-optical effects offer unique properties for sensor development.
Developing high-performance sensor arrays is essential for advanced detection systems.

Purpose of the Study:

To propose a novel side-coupled liquid sensor and its array based on magneto-optical photonic crystals.
To investigate the sensitivity and quality factor of the proposed sensor and its array.
To evaluate the robustness of the magneto-optical photonic crystal sensor array.

Main Methods:

Design and simulation of a side-coupled magneto-optical photonic crystal sensor.
Fabrication and characterization of a single sensor and its array.
Analysis of sensitivity and quality factor based on refractive index changes.

Main Results:

A single magneto-optical photonic crystal sensor achieved a sensitivity of 0.492 mm/RIU and a quality factor of 181,760.
The arrayed microcavity sensors exhibited sensitivities ranging from 0.1 to 0.35 mm/RIU.
The arrayed sensors maintained quality factors between 5×10⁴ and 7×10⁴, with good structural robustness.

Conclusions:

The proposed magneto-optical photonic crystal sensor array offers high performance for liquid sensing.
The sensor array exhibits good sensitivity and quality factor, suitable for various applications.
This work provides a design reference for developing high-performance photonic crystal microcavity sensor arrays.