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Design and Characterization Methodology for Efficient Wide Range Tunable MEMS Filters

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Tunable Bragg filters with a phase transition material defect layer.

Xi Wang, Zilun Gong, Kaichen Dong

|September 9, 2016

Summary

This summary is machine-generated.

We developed a tunable Bragg filter using a vanadium dioxide defect layer for dynamic optical control. This solid-state device demonstrates tunable properties, paving the way for advanced optical filter applications.

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Area of Science:

Optics and Photonics
Materials Science

Background:

Bragg filters are crucial optical components.
Tunable filters are needed for advanced optical systems.
Phase transition materials offer unique optical properties.

Purpose of the Study:

To propose and demonstrate an all-solid-state tunable Bragg filter.
To utilize a phase transition material as the defect layer for tunability.
To investigate the tunability and underlying mechanisms of the proposed filter.

Main Methods:

Fabrication of Bragg filters with a vanadium dioxide defect layer between SiO2/TiO2 gratings.
Temperature-dependent reflection spectroscopy to measure filter properties.
Temperature-dependent Raman spectroscopy to study the phase transition of VO2.

Main Results:

Experimental demonstration of tunable Bragg filters.
Observation of dynamic tunability and hysteresis in the filter's reflection spectrum.
Correlation between VO2 phase transition and filter tunability confirmed by Raman spectroscopy.

Conclusions:

The proposed all-solid-state tunable Bragg filter utilizing VO2 is successfully demonstrated.
The filter exhibits dynamic tunability and hysteresis linked to the VO2 phase transition.
This work opens new possibilities for tunable optical filter design by integrating phase transition materials with optical cavities.