Quantum Dot Microdrop Laser

Quantum Dot Microdrop Laser

We report single-mode and multimode lasing from isolated spherical liquid microcavities containing CdSe/ZnS nanocrystal quantum dots. Lasing is observed at densities more than 2 orders of magnitude lower than previously demonstrated or theoretically predicted, assuming a uniform nanocrystal quantum...

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Veröffentlicht in:2008 Conference on Lasers and Electro-Optics and 2008 Conference on Quantum Electronics and Laser Science 2008-06, Vol.8 (6), p.1709-1712
Hauptverfasser: Schäfer, J, Mondia, J. P, Sharma, R, Lu, Z. H, Susha, A. S, Rogach, A. L, Wang, L. J
Format: Artikel
Sprache:eng
Schlagworte:
(140.3945) Microcavities
(160.4236) Nanomaterials
Applied sciences
Charge coupled devices
Electronics
Equipment Design
Equipment Failure Analysis
Exact sciences and technology
Fundamental areas of phenomenology (including applications)
Laser excitation
Laser modes
Lasers
Microcavities
Molecular electronics, nanoelectronics
Optical feedback
Optics
Physics
Pump lasers
Quantum dot lasers
Quantum Dots
Semiconductor electronics. Microelectronics. Optoelectronics. Solid state devices
Solids
Surface emitting lasers
Zinc compounds
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Beschreibung
Zusammenfassung:We report single-mode and multimode lasing from isolated spherical liquid microcavities containing CdSe/ZnS nanocrystal quantum dots. Lasing is observed at densities more than 2 orders of magnitude lower than previously demonstrated or theoretically predicted, assuming a uniform nanocrystal quantum dot distribution. Charged droplets, between 10 and 40 µm in size, are electrodynamically levitated and optically pumped. Substantial laser signals at low thresholds are measured from the directional emission normal to the pump beam, owing to the high Q cavity modes.
ISSN:1530-6984
1530-6992
DOI:10.1021/nl080661a