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

Strain engineering has proven to be vital for germanium-based photonics, inparticular light emission. However, applying a large permanent biaxial strainto germanium has been a challenge. We present a simple, CMOS-compatibletechnique to conveniently induce a large, spatially homogenous strain inmicrodisks patterned within ultrathin germanium nanomembranes. Our techniqueworks by concentrating and amplifying a pre-existing small strain into themicrodisk region. Biaxial strains as large as 1.11% are observed by Ramanspectroscopy and are further confirmed by photoluminescence measurements, whichshow enhanced and redshifted light emission from the strained microdisks. Ourtechnique allows the amount of biaxial strain to be customizedlithographically, allowing the bandgaps of different microdisks to beindependently tuned in a single mask process. Our theoretical calculations showthat this platform can deliver substantial performance improvements, includinga >200x reduction in the lasing threshold, to biaxially strained germaniumlasers for silicon-compatible optical interconnects.

A Nanomembrane-Based Bandgap-Tunable Germanium Microdisk Using Lithographically-Customizable Biaxial Strain for Silicon-Compatible Optoelectronics