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 demonstrate a kind of grating coupler that generates high quality flat-topbeam with a small beamwidth from photonic integrated circuits into free-space.The grating coupler is designed on a silicon-on-insulator wafer with a 220nm-thick silicon layer and consists of a dual-etch grating (DG) and adistributed Bragg reflector (DBR). By adjusting the structural parameters of DGand DBR, a pixel-level (6.6 um) flat-top beam with the vertical radiation of-0.5 dB and the mode match of 97% at 1550 nm is realized. Furthermore, a seriesof high-efficiency grating couplers are designed to create flat-top beam withdifferent scales.

High-efficiency grating couplers for pixel-level flat-top beam generation