Non-linear optical properties of zinc oxide nanowires

作者：Tang, C F; Deng, H^*; Tang, B; Cheng, H; Wang, J C; Chen, J J

来源：Journal of Nanoscience and Nanotechnology, 2008, 8(3): 1150-1154.

DOI：10.1166/jnn.2008.313

• ZnO
• nanowires
• VLS
• PL spectra
• two-photon absorption
• nonlinearity

High quality zinc oxide (ZnO) nanowires were grown on n-type Si (100) using vapor-liquid-solid process. We obtained the photoluminescence spectra of ZnO nanowires based on nonlinear optical process using an ultrashort wavelength femtosecond laser as a pumping source. The spectra shows the second harmonic generation phenomenon, as well as the exciton-exciton collision peak at 388 nm and the green emission peak at 515 nm caused by oxygen vacancy. A laser emission peak near 392 nm was observed when pump intensity surpassed 52 mJ/cm(2) and a sharp peak about 0.5 nm wide emerged when the energy intensity reached 700 mJ/cm(2). We attribute this excitation process to a two-photon absorption process enhanced by Rabi oscillation.

• 出版日期2008-3
• 单位电子科技大学