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Non-linear optical properties of zinc oxide nanowires

Tang, C. F. and Deng, H and Tang, B and Cheng, H and Wang, J. C. and Chen, J. J. (2008) Non-linear optical properties of zinc oxide nanowires. JOURNAL OF NANOSCIENCE AND NANOTECHNOLOGY, 8 (3). pp. 1150-1154.

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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.

Item Type:Article
Uncontrolled Keywords:ZnO; nanowires; VLS; PL spectra; two-photon absorption; nonlinearity
Subjects:Material Science > Nanofabrication processes and tools
Physical Science > Photonics
ID Code:1481
Deposited By:Farnush Anwar
Deposited On:15 Dec 2008 10:14
Last Modified:19 Feb 2009 10:00

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