Tunable Whispering Gallery Mode Emission from Quantum‐Dot‐Doped Microspheres
- 28 December 2004
- Vol. 1 (2), 238-241
- https://doi.org/10.1002/smll.200400019
Abstract
We describe the synthesis of quantum‐dot (QD) doped silica microspheres and a method by which it is possible to fine‐tune the position of the whispering gallery modes (WGMs) produced by the fluorescence emission of CdSe@ZnS doped silica microspheres (5.06 μm in diameter). The method is based on small perturbations to the sphere's refractive index caused by adsorption of thin layers of polyelectrolytes and modification of the radial position of the nanocrystals within the microsphere by means of deposited silica shells.Keywords
This publication has 12 references indexed in Scilit:
- Mode control by nanoengineering light emitters in spherical microcavitiesApplied Physics Letters, 2003
- Dot-in-a-dot: electronic and photonic confinement in all three dimensionsApplied Physics B Laser and Optics, 2003
- A General Method To Coat Colloidal Particles with SilicaLangmuir, 2003
- Formation of High-Quality CdS and Other II-VI Semiconductor Nanocrystals in Noncoordinating Solvents: Tunable Reactivity of MonomersAngewandte Chemie International Edition, 2002
- Enhanced spontaneous emission from semiconductor nanocrystals embedded in whispering gallery optical microcavitiesPhysical Review B, 2001
- Light Trapped in a Photonic Dot: Microspheres Act as a Cavity for Quantum Dot EmissionNano Letters, 2001
- Photons confined in hollow microspheresApplied Physics Letters, 2001
- Quantum dots in photonic dotsApplied Physics Letters, 2000
- 1. Ultrathin Multilayer Polyelectrolyte Films on Gold: Construction and Thickness DeterminationLangmuir, 1997
- Morphology-dependent resonances in radially inhomogeneous spheresJournal of the Optical Society of America A, 1991