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/

Zendy Plus

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

Zendy Tools

Zendy Open

Van der Waals (vdW) heterostructures are receiving great attentions due totheir intriguing properties and potentials in many research fields. The flow ofcharge carriers in vdW heterostructures can be efficiently rectified by theinter-layer coupling between neighboring layers, offering a rich collection offunctionalities and a mechanism for designing atomically thin devices.Nevertheless, non-uniform contact in larger-area heterostructures reduces thedevice efficiency. In this work, ion irradiation had been verified as anefficient technique to enhance the contact and interlayer coupling in the newlydeveloped graphene/WSe2 hetero-structure with a large area of 10 mm x 10 mm.During the ion irradiation process, the morphology of monolayer graphene hadbeen modified, promoting the contact with WSe2. Experimental evidences of thetunable interlayer electron transfer are displayed by investigation ofphotoluminescence and ultrafast absorption of the irradiated heterostructure.Besides, we have found that in graphene/WSe2 heterostructure, graphene servesas a fast channel for the photo-excited carriers to relax in WSe2, and thenonlinear absorption of WSe2 could be effectively tuned by the carrier transferprocess in graphene, enabling specific optical absorption of theheterostructure in comparison with separated graphene or WSe2. On the basis ofthese new findings, by applying the ion beam modified graphene/WSe2heterostructure as a saturable absorber, Q-switched pulsed lasing withoptimized performance has been realized in a Nd:YAG waveguide cavity. This workpaves the way towards developing novel devices based on large-areaheterostructures by using ion beam irradiation.

Tuning of Interlayer Coupling in Large-Area Graphene/WSe2 van der Waals  Heterostructure via Ion Irradiation: Optical Evidences and Photonic  Applications