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 Plus monthly

Global: Zendy Tools annual

Global: Zendy Tools monthly

Global: Zendy Free Plan

Coupling to longitudinal modes of thin spherical shells, under Gaussian-beamillumination, was explored with a theoretical method based on Fourier-opticsanalysis and vector spherical harmonics. The illumination frequency band wasfixed between 100-600 GHz and the outer spherical shell radius of curvature andthickness are 7.5 mm and 0.5 mm, respectively. The shell material was eitherthe lossless cornea or an aqueous effective media representing the cornea. Sixdifferent beam-target strategies were introduced being potential candidates formaximum coupling. Two dispersion-tuned beam ensembles with stronglyfrequency-dependent phase center location have been created with a fixedincident beam 1/e radius and radius of curvature called forward strategies.These computations of different alignments were continued with four beamensembles of frequency-invariant phase center, constructed from fits toexperimental data, oriented at four different axial locations with respect tothe spherical shell center of curvature, they are called reverse strategies.Coupling efficiency for all strategies was calculated for different targetsincluding PEC sphere, air-core, and PEC core covered by a cornea loss-freelayer and cornea. All scattering strategies contrasted to scattering fromequivalent planar targets as a reference with maximum coupling. The resultsshow that, under an ideal calibration, forward strategies are a closerapproximation to the plane-wave condition. However, target properties influencethe coupling efficiency remarkably for instance the observed difference incornea scattering is vanishingly small as dielectric loss limits walk-off loss.Furthermore, under perturbed calibration, the forward strategies showed lesssensitivity.

Coupling to longitudinal modes in spherical thin shells illuminated by submillimeter wave Gaussian beam: applications to corneal sensing