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Quantum dot emission modulation using piezoelectric photonic crystal MEMS resonators
Optics Express
|October 19, 2017
Summary
We developed voltage-tunable photonic crystal (PC) structures with integrated quantum dots (QDs). These devices use piezoelectric resonators to modulate QD emission at MHz frequencies for faster, more robust optical switching.
Area of Science:
- Optoelectronics
- Materials Science
- Nanotechnology
Background:
- Integrating quantum dots (QDs) into photonic devices necessitates precise control over their light emission.
- Existing methods for modulating QD emission often face limitations in speed and mechanical robustness.
Purpose of the Study:
- To demonstrate voltage-tunable photonic crystal (PC) structures with integrated QDs.
- To achieve modulation of QD emission at MHz frequencies using piezoelectric resonators.
Main Methods:
- Fabrication of suspended piezoelectric aluminum nitride thin film resonators.
- Integration of quantum dots (QDs) within the photonic crystal (PC) structure.
- Actuation of the piezoelectric device at its resonant mechanical frequency to modulate optical properties.
Main Results:
- Successful demonstration of voltage-tunable PC structures with integrated QDs.
- Modulation of PC enhancement and QD emission direction achieved at MHz frequencies.
- Utilized nanometer-scale mechanical displacements for modulation, indicating potential for high switching speeds.
Conclusions:
- The developed piezoelectric-actuated PC structures offer a scalable approach for modulating QD emission.
- The method provides enhanced mechanical robustness and avoids stiction issues common in other devices.
- This technology holds promise for advanced photonic devices requiring fast and reliable optical modulation.
