Quantum dot microdrop laser

Schaefer, J.; Mondia, J. P.; Sharma, R.; Lu, Z. H.; Susha, A. S.; Rogach, A. L.; Wang, L. J.

doi:10.1021/nl080661a

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Quantum dot microdrop laser

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Schaefer, J.
Max Planck Research Group, Max Planck Institute for the Science of Light, Max Planck Society;

/persons/resource/persons201132

Mondia, J. P.
Max Planck Research Group, Max Planck Institute for the Science of Light, Max Planck Society;

/persons/resource/persons201194

Sharma, R.
Max Planck Research Group, Max Planck Institute for the Science of Light, Max Planck Society;
International Max Planck Research School, Max Planck Institute for the Science of Light, Max Planck Society;

/persons/resource/persons60677

Lu, Z. H.
Max Planck Fellow Group, Max Planck Institute for the Science of Light, Max Planck Society;

/persons/resource/persons201228

Wang, L. J.
Max Planck Research Group, Max Planck Institute for the Science of Light, Max Planck Society;

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引用

Schaefer, J., Mondia, J. P., Sharma, R., Lu, Z. H., Susha, A. S., Rogach, A. L., & Wang, L. J. (2008). Quantum dot microdrop laser. NANO LETTERS, 8(6), 1709-1712. doi:10.1021/nl080661a.

引用: https://hdl.handle.net/11858/00-001M-0000-002D-6C9C-B

要旨

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.