From Event: SPIE Optical Engineering + Applications, 2016
The ultrafast temporal dynamics of a single ZnO nanowire is probed using an ultraviolet femtosecond Kerr-gated wide
field fluorescence microscope. The microscope is a comprehensive tool that not only operates in steady state and
transient mode but can also function as both an ultrafast imaging instrument as well as a femtosecond fluorescence
spectrometer. The sub 90 femtosecond temporal resolution and sub micron spatial resolution facilitate the measurement
of ultrafast dynamics of single nanostructures. The steady state and temporal emission from a single ZnO nanowire is
observed at different fluences. At high fluences the carrier density exceeds that of the Mott density and bandgap
renormalization is observed in the transient spectra. Morphological anomalies resulted in enhanced localized emission
from regions along the nanowire. Selective area analysis facilitated extraction of emission dynamics from a single region
on the nanowire and provided insight into how structural inhomogeneities affect ultrafast phenomenon occurring in a
Jolie C. Blake, Jesus Nieto-Pescador, Zhengxin Li, and Lars Gundlach, "Ultrafast dynamics of single ZnO nanowires using ultraviolet femtosecond Kerr-gated wide-field fluorescence microscopy," Proc. SPIE 9956, Ultrafast Nonlinear Imaging and Spectroscopy IV, 99560U (Presented at SPIE Optical Engineering + Applications: August 29, 2016; Published: 5 October 2016); https://doi.org/10.1117/12.2235798.
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