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Quantum dot microdrop laser
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DOI：10.1021/nl080661a.png)
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Abstract
En 中文
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 mu m 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.
Keywords:
CDTE NANOCRYSTALS
OPTICAL GAIN
EMISSION
SINGLE
MICROCAVITY
COMPOSITE
DROPLETS
PARTICLE
SPECTRA
CAVITY
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