Lasing from CdSe/ZnS quantum rods in a cylindrical microcavity

Miri Kazes, David Y. Lewis, Yuval Ebenstein, Taleb Mokari, Uri Banin

Research output: Contribution to journalConference articlepeer-review

1 Scopus citations

Abstract

Lasing from CdSe/ZnS quantum rods and quantum dots both in solution and in a film is studied by utilizing a high Q cylindrical microcavity, showing Whispering Gallery Mode (WGM) lasing. CdSe/ZnS quantum rods, in comparison to quantum dots, exhibited remarkably reduced lasing thresholds. In addition, polarization measurements revealed that quantum rods have a linear polarized lasing, in contrast to quantum dots that show no preferable lasing polarization. Furthermore, an efficient and reproducible method is employed for preparation of nanocrystal films inside capillaries by laser irradiation for achieving robust lasing. Further irradiation of the film resulted in a room temperature stable lasing over hundreds of pump pulses, lasing thresholds as low as 0.02mJ and lasing intensities that are three orders of magnitude larger than the saturated fluorescence intensity. This was successfully applied to CdSe/ZnS quantum rod samples of varied dimensions and was also demonstrated for quantum dot samples.

Original languageEnglish
Pages (from-to)11-16
Number of pages6
JournalMaterials Research Society Symposium Proceedings
Volume789
DOIs
StatePublished - 1 Jan 2003
Externally publishedYes
EventQuantum Dots, Nanoparticles and Nanowires - Boston, MA, United States
Duration: 1 Dec 20035 Dec 2003

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