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 propose the use of an optically trapped, dye doped polystyrene microspherefor spatial probing of the refractive index at any position in a fluid. Wedemonstrate the use of the dye embedded in the microsphere as an internalbroadband excitation source, thus eliminating the need for a tunable excitationsource. We measured the full width at half maximum of the TE and TM resonances,and their frequency spacing as a function of the refractive index of theimmersion fluid. From these relations we obtained an absolute sensitivity of5e-4 in local refractive index, even when the exact size of the microsphere wasnot a priori known.Comment: 3 pages, 3 figure

Spatial refractive index sensor using whispering gallery modes in an optically trapped microsphere