Colloidal Quantum Dots in All-Dielectric High-Q Pillar Microcavities

We have fabricated all-dielectric high-Q optical pillar resonators with embedded colloidal CdSe/ZnS quantum dots or rods as light emitters by focused ion beam milling. Three-dimensional light confinement and distinct pillar microcavity modes are observed. Results from a waveguide model for the mode...

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Bibliographic Details
Published in:Nano letters 2007-09, Vol.7 (9), p.2897-2900
Main Authors: Kahl, Matthias, Thomay, Tim, Kohnle, Verena, Beha, Katja, Merlein, Jörg, Hagner, Matthias, Halm, Andreas, Ziegler, Jan, Nann, Thomas, Fedutik, Yuri, Woggon, Ulrike, Artemyev, Mikhail, Pérez-Willard, Fabián, Leitenstorfer, Alfred, Bratschitsch, Rudolf
Format: Article
Language:English
Subjects:
Applied sciences
Colloids - chemistry
Cross-disciplinary physics: materials science
rheology
Electronics
Exact sciences and technology
Materials science
Materials Testing
Molecular electronics, nanoelectronics
Nanocrystalline materials
Nanoscale materials and structures: fabrication and characterization
Nanotechnology - methods
Particle Size
Physics
Quantum Dots
Semiconductor electronics. Microelectronics. Optoelectronics. Solid state devices
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Summary:We have fabricated all-dielectric high-Q optical pillar resonators with embedded colloidal CdSe/ZnS quantum dots or rods as light emitters by focused ion beam milling. Three-dimensional light confinement and distinct pillar microcavity modes are observed. Results from a waveguide model for the mode patterns and their spectral positions are in excellent agreement with the experimental data. Cavities with elliptical cross sections show higher quality factors in the short axis direction than do circular resonators of the same cross-sectional area.
ISSN:1530-6984
1530-6992
DOI:10.1021/nl071812x