Two-photon absorption and resonance enhancement of second harmonic in ZnO nanowires

ZnO nanowires are prepared using vapor-liquid-solid process. Two-photon absorption measurement has been carried out using femtosecond laser pulses ranging from 700-800 nm. In addition to the deep-level green emission around 530 nm due to the surface defect and the near band-edge ultraviolet emission...

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Bibliographic Details
Main Authors: Prasanth, R., van Vugt, L.K., Palero, J., Gerritsen, H.C., Vanmaekelbergh, D.A.M.
Format: Conference Proceeding
Language:English
Subjects:
Absorption
Crystalline materials
Excitons
Nanowires
Nonlinear optics
Optical materials
Photoconducting materials
Resonance
Ultrafast optics
Zinc oxide
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Summary:ZnO nanowires are prepared using vapor-liquid-solid process. Two-photon absorption measurement has been carried out using femtosecond laser pulses ranging from 700-800 nm. In addition to the deep-level green emission around 530 nm due to the surface defect and the near band-edge ultraviolet emission around 360 nm due to the exciton, a second harmonic peak has been observed. The strength of the frequency-doubled component is enhancing while tuning the two-photon absorption wavelength towards the exciton wavelength of the nanowires, due to resonant exciton absorption.
ISSN:1944-9399
1944-9380
DOI:10.1109/NANO.2005.1500643