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Quantum Dot-Plasmon Lasing with Controlled Polarization Patterns
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DOI：10.1021/acsnano.9b09466.png)
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摘要
En 中文
The tailored spatial polarization of coherent light beams is important for applications ranging from microscopy to biophysics to quantum optics. Miniaturized light sources are needed for integrated, on-chip photonic devices with desired vector beams; however, this issue is unresolved because most lasers rely on bulky optical elements to achieve such polarization control. Here, we report on quantum dot-plasmon lasers with engineered polarization patterns controllable by near-field coupling of colloidal quantum dots to metal nanoparticles. Conformal coating of CdSe-CdS core-shell quantum dot films on Ag nanoparticle lattices enables the formation of hybrid waveguide-surface lattice resonance (W-SLR) modes. The sidebands of these hybrid modes at nonzero wavevectors facilitate directional lasing emission with either radial or azimuthal polarization depending on the thickness of the quantum dot film.
Keyword:
lattice plasmons
surface lattice resonances
waveguide
band structure engineering
colloidal quantum dots
nanolaser
radially mid azimuthally polarization states
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16
论文数:
2.7W
被引数:
25.6W
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