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

A double-ridge waveguide is designed for efficient and robust second-harmonicgeneration (SHG) using the thin-film lithium-niobate-on-insulator (LNOI)platform. Perfect phase matching (PhM) is achieved between the fundamentalwaveguide mode at 1550 nm and a higher-order mode at the second harmonic. Thefabrication tolerances of the PhM condition are simulated using afinite-difference method mode solver, and conversion efficiencies as high as3.92/W are obtained for a 1-cm long waveguide. This design allows access to thelargest element of the second-order nonlinear susceptibility tensor, andrepresents a scalable alternative to waveguides based on periodically-poledlithium niobate (PPLN). The design has the potential for generating pairs ofentangled photons in the infrared C-band by spontaneous parametricdown-conversion (SPDC).

Efficient and robust second-harmonic generation in thin-film lithium niobate using modal phase matching