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Coupling in a dual metallo-dielectric nanolaser system
Optics Letters
|November 16, 2017
Summary
Metallo-dielectric nanolasers enable dense integration in photonic circuits. Researchers demonstrated and prevented coupling between closely spaced nanolasers by controlling their resonant wavelengths.
Area of Science:
- Photonics
- Nanotechnology
- Optical Engineering
Background:
- Subwavelength nanolasers are crucial for high-density photonic integrated circuits.
- Metallo-dielectric nanolasers offer advantages like low Joule loss and nanoscale dimensions for dense integration.
- Optical cavity coupling is known, but its occurrence in metal-clad cavities remains unexplored.
Purpose of the Study:
- To investigate coupling phenomena between closely spaced metallo-dielectric nanolasers.
- To understand the impact of proximity on the performance of these nanolasers.
- To develop strategies for maintaining independent operation of adjacent nanolasers.
Main Methods:
- Fabrication of two metallo-dielectric nanolasers.
- Gradual reduction of the separation distance between the nanolasers.
- Analysis of resonant wavelength and quality factor shifts.
- Detuning the resonance of one cavity to prevent coupling.
Main Results:
- Demonstrated coupling between two metallo-dielectric nanolasers upon reducing separation.
- Observed a split in resonant wavelength and quality factor due to bonding/anti-bonding supermodes.
- Successfully prevented coupling by detuning the resonant frequencies of the adjacent cavities.
Conclusions:
- Metallo-dielectric nanolasers exhibit coupling when in close proximity, forming supermodes.
- Detuning resonant frequencies is an effective method to maintain independent operation of adjacent nanolasers.
- This work provides insights for designing densely packed, crosstalk-free photonic integrated circuits.
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