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

Wang, Yue; Leck, Kheng Swee; Ta, Van Duong; Chen, Rui; Nalla, Venkatram; Gao, Yuan; He, Tingchao; Demir, Hilmi Volkan et al. · Adv Mater · 2015

basic_science · Level V

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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.