Room-Temperature Lasing Characteristics of Zinc Sulfide Single Nanoribbons
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Room-Temperature Lasing Characteristics of Zinc Sulfide Single Nanoribbons J. A. Zapien1, Y. Jiang1, X.-M. Meng2, W. Chen1, Y. Lifshitz1,3, & S.-T. Lee1 1 Center of Super-Diamond and Advanced Films (COSDAF) and Department of Physics and Materials Science, City University of Hong Kong, Hong Kong SAR, China, 2 Technical Institute of Physics and Chemistry, Beijing, China, 3 On leave from Soreq NRC, Yavne 81800, Israel ABSTRACT We present a study of the photoluminescence and lasing characteristics of individual single-crystal zinc sulfide nanoribbons. We show that ZnS presents optical gain at the near band gap emission of ~338 nm. Optical gain together with the optical cavity defined by the perfect crystallographic structure with a rectangular cross section results in lasing activity at optical pumping power densities of ~ 50 kW/cm2. Small collection angle measurements show that nanoribbons form excellent optical cavities and gain medium with record (FWHM
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