Blue liquid lasers from solution of CdZnS/ZnS ternary alloy quantum dots with quasi-continuous pumping

Yue Wang; Kheng Swee Leck; Van Duong Ta; Rui Chen; Venkatram Nalla; Yuan Gao; Tingchao He; Hilmi Volkan Demir; Handong Sun

doi:10.1002/adma.201403237

Blue liquid lasers from solution of CdZnS/ZnS ternary alloy quantum dots with quasi-continuous pumping

Adv Mater. 2015 Jan 7;27(1):169-75. doi: 10.1002/adma.201403237. Epub 2014 Sep 18.

Authors

Yue Wang¹, Kheng Swee Leck, Van Duong Ta, Rui Chen, Venkatram Nalla, Yuan Gao, Tingchao He, Hilmi Volkan Demir, Handong Sun

Affiliation

¹ Division of Physics and Applied Physics, School of Physical and Mathematical Sciences, Nanyang Technological University, Singapore, 637371, Singapore.

PMID: 25236951
DOI: 10.1002/adma.201403237

Abstract

A blue (ca. 440 nm) liquid laser with an ultra-low threshold through which quasi-continuous wave pumping is accessible is achieved by engineering unconventional ternary CdZnS/ZnS alloyed-core/shell QDs. Such an achievement is enabled by exploiting the novel gain media with minimal defects, suppressed Auger recombination, and large gain cross-section in combination with high-quality-factor whispering gallery mode resonators.

Keywords: Auger recombination; blue lasing; liquid phase; quantum dots.