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

We investigate the nonlinear optical response of a four-level double-V-typequantum system interacting with a pair of weak probe fields while located neara two-dimensional array of metal-coated dielectric nanospheres. Such a quantumsystem contains a V-type subsystem interacting with surface plasmons, andanother V-type subsystem interacting with the free-space vacuum. A distinctivefeature of the proposed setup is its sensitivity to the relative phase of theapplied fields when placed near the plasmonic nanostructure. We demonstratethat due to the presence of the plasmonic nanostructure, the third-order(Kerr-type) susceptibility for one of the laser fields can be significantlymodified while another probe field is acting. Moreover, the Kerr nonlinearityof the system can be controlled and even enhanced by varying the distance ofthe quantum system from the plasmonic nanostructure.We also show that the Kerrnonlinearity of such a system can be controlled by adjusting the relative phaseof the applied fields. The results obtained may find potential applications inon-chip nanoscale photonic devices. We also study the light-matter interactionin the case where one probe field carries an optical vortex, and another probefield has no vortex. We demonstrate that due to the phase sensitivity of theclosed-loop double V-type quantum system, the linear and nonlinearsusceptibility of the nonvortex probe beam depends on the azimuthal angle andorbital angular momentum (OAM) of the vortex probe beam. This feature ismissing in open four-level double V-type quantum system interacting withfree-space vacuum, as no quantum interference occurs in this case. We use theazimuthal dependence of optical susceptibility of the quantum system todetermine the regions of spatially-structured transmittance.

Control of nonlinear optical phenomena and spatially structured optical effects in a four-level quantum system near a plasmonic nanostructure