Ultraviolet Lasing Action in ZnO Nanosheets

摘要: We report room-temperature ultraviolet lasing action in large quantities of uniform multilayer ZnO nanosheets grown by a vapor-transport method via thermal evaporation Zn powder. An excellent multimode emission at center wavelength 390 nm with mode linewidth less than 0.33 occurs above an excitation threshold 8 mJ pulse(-1) cm(-2). The observed may be attributed to microcavity effect and low concentration defects the nanosheets. believe that single-mode can obtained growing completely nanosheet is attractive candidate as gain medium realize semiconductor diode lasers.