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Quantum Dot-Plasmon Lasing with Controlled Polarization Patterns.
- Source :
-
ACS nano [ACS Nano] 2020 Mar 24; Vol. 14 (3), pp. 3426-3433. Date of Electronic Publication: 2020 Feb 12. - Publication Year :
- 2020
-
Abstract
- 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.
Details
- Language :
- English
- ISSN :
- 1936-086X
- Volume :
- 14
- Issue :
- 3
- Database :
- MEDLINE
- Journal :
- ACS nano
- Publication Type :
- Academic Journal
- Accession number :
- 32049478
- Full Text :
- https://doi.org/10.1021/acsnano.9b09466