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Voltage-tunable Q factor in a photonic crystal microcavity
Optics Letters
|May 24, 2023
Summary
Researchers developed a tunable photonic crystal microcavity using liquid crystal technology. This device allows for precise control over its quality factor (Q factor) with applied voltage.
Area of Science:
- Photonics
- Materials Science
- Condensed Matter Physics
Background:
- Photonic crystal microcavities are crucial for controlling light.
- Tunable quality factors (Q factors) are essential for advanced photonic devices.
- Bound states in the continuum (BICs) offer high Q factors but often lack tunability.
Purpose of the Study:
- To implement a photonic crystal microcavity with a tunable Q factor.
- To utilize liquid crystal cell technology for Q factor modulation.
- To demonstrate the tunability of a BIC-based microcavity.
Main Methods:
- Fabrication of a photonic crystal microcavity on a liquid crystal cell platform.
- Integration of liquid crystal technology to enable Q factor tuning.
- Measurement of the microcavity's Q factor across a range of applied voltages.
Main Results:
- Successful implementation of a photonic crystal microcavity with a tunable Q factor.
- Demonstrated Q factor modulation from 100 to 360.
- Achieved Q factor tunability within a low voltage range (0.6 V).
Conclusions:
- Liquid crystal technology provides an effective method for tuning the Q factor of BIC-based photonic microcavities.
- The demonstrated device offers a promising platform for tunable photonic applications.
- Low-voltage tunability enhances the practicality of these microcavities for integrated photonics.
