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 Tools annual

Global: Zendy Free Plan

Global: Zendy Tools monthly

Global: Zendy Plus monthly

Phase-matched nonlinear processes exhibit a tradeoff between the conversionefficiency and the acceptance bandwidth. Adiabatic nonlinear processes, inwhich the phase mismatch varies slowly along the interaction length, enable usto overcome this tradeoff, allowing an efficient frequency conversion withbroad spectral and thermal bandwidths. Until now, the variation in the phasemismatch condition was mainly based on quasi-phase matching in ferroelectriccrystals. However, this solution is limited to low power sources. Here,instead, we study the adiabatic second harmonic in birefringently phase-matchedlithium triborate crystal, enabling us to handle much higher power levels. Thevariation in the phase mismatch is achieved by inducing a temperature gradientalong the crystal. By using a 50 mm long crystal, the adiabatic processprovided a temperature bandwidth of 18-celsius degrees, 5.4 times wider thanwhat is achieved when the same crystal is held at the fixed phasematchingtemperature. The conversion efficiency exceeded 60% for a 0.9 millijoule pumppulse.

Broadband and robust adiabatic second-harmonic generation by a temperature gradient in birefringently phase-matched lithium triborate crystal