English (United Kingdom)

https://curated-unify.zendy.io/wp-json/zendy-region/v1/featured_content/oa?rat=en

https://curated-unify.zendy.io/wp-json/zendy-region/v1/highlighted_journal/

Global: Zendy Plus annual

Presents the access of premium content as premium feature

Premium Content

Presents the keyphrase highlighting as premium feature

Keyphrase Highlighting

Presents the summarisation as premium feature

Summarisation

Insights

Presents the pdf analysis as premium feature

PDF Analysis

Presents the zaia usage as premium feature

ZAIA

Global: Zendy Tools annual

Global: Zendy Free Plan

Global: Zendy Tools monthly

Global: Zendy Plus monthly

We report the studies of third harmonic generation efficiency using an interface-scanning technique for colloidal suspensions of harmonic ZnO nanoparticles under nanosecond-range pulsed laser excitation at 1064 nm. The harmonic nanoparticles represent a new type of biomarkers for multiphoton imaging, which generate efficiently second-, thirdand higher-order optical harmonics. Using the reference data for fused silica, the characteristic orientationaveraged nondegenerate cubic nonlinear optical susceptibility ~ 10 esu is obtained for the ZnO nanoparticles with the mean sizes 40–150 nm. The third harmonic generation efficiency increases with increasing nanoparticle size and achieves the reference data known for the bulk ZnO crystals. The technique suggested by us can be applied in nondestructive express diagnostics of nanoparticles, when characterizing their nonlinear optical properties, studying the effect of their size and shape, and further improving their harmonic generation efficiency.

Characterization of colloidal nanoparticle suspensions using the third harmonic generation at interfaces