Nanometer-scale optical imaging of epitaxially grown GaN and InN islands using apertureless near-field microscopy

Article Abstract:

Nanometer-scale chemical imaging of epitaxially grown gallium nitride (GaN) and indium nitride (InN) islands is performed using scattering-type apertureless near-field scanning optical microscopy. The scattering of 633nm laser radiation is modulated by an oscillating metallic probe, and the scattered radiation is detected by homodyne amplification, followed by high-harmonic demodulation, yielding optical near-field scattering maps with a spatial resolution better than 30 nm.

Primary nonferrous metals, not elsewhere classified, Primary Smelting and Refining of Nonferrous Metal (except Copper and Aluminum), Indium, Epitaxy, Chemical properties, Gallium nitrate

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Ultrafast wavelength-dependent lasing-time dynamics in single ZnO nanotetrapod and nanowire lasers

Article Abstract:

The ultrafast lasing dynamics of single zinc oxide (ZnO) nanotetrapods and nanowires are investigated by two-color femtosecond excitation/optical injection spectroscopy. The optical gain spectra obtained as a function of time and wavelength provide a means to distinguish the lasing from other emissions and are thus used to investigate the wavelength-dependent lasing dynamics in nanowires.

Spectra

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One-dimensional ZnO nanostructure arrays: Synthesis and characterization

Article Abstract:

One-dimensional (1-D) ZnO nanostructure arrays, such as nanowires, nanonails and nanotrees, are synthesized by oxygen assisted thermal evaporation of metallic zinc on a quartz substrate over a large area. The optical and electrical properties of the ZnO nanowire and nanonail arrays and also the applicability of these ZnO 1-D nanoform arrays as gas sensors are investigated.

Electric properties

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