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Plasmonic Hinge Modes in Metal-Coated Nanolasers
Sangyeon Cho1,2, Yi Yang3,4, Marin Soljačić3
1Wellman Center for Photomedicine, Massachusetts General Hospital and Harvard Medical School, 65 Landsdowne St., Cambridge, Massachusetts 02139, United States.
Nano Letters
|October 16, 2024
Summary
Researchers developed substrate-free plasmonic lasers using coated semiconductor particles. These novel devices support unique plasmonic hinge modes, enabling efficient lasing and sensing applications.
Area of Science:
- Optics and Photonics
- Materials Science
- Nanotechnology
Background:
- Traditional plasmonic lasers rely on flat metal substrates.
- Novel architectures are needed to enhance laser performance and functionality.
Purpose of the Study:
- To introduce substrate-free plasmonic lasers utilizing coated semiconductor particles.
- To investigate the properties of plasmonic hinge modes for lasing applications.
Main Methods:
- Coating semiconductor particles (CsPbBr3 cubes) with thin noble metal layers (gold shells).
- Characterizing plasmonic hinge modes using optical spectroscopy.
- Demonstrating lasing via nanosecond pulsed laser pumping.
Main Results:
- Achieved substrate-free plasmonic lasers with hinge modes localized at particle edges and corners.
- Observed high Purcell factors (>100) and Q-factors (15-20).
- Demonstrated efficient lasing at 538 nm with a narrow linewidth (0.6) using submicron perovskite cubes.
Conclusions:
- Substrate-free plasmonic lasers with hinge modes offer a novel platform for light generation.
- The evanescent fields of these lasers show sensitivity to external perturbations, suggesting sensing potential.
- This technology holds promise for advanced sensing and imaging applications.
