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

Terahertz (THz)-bandwidth continuous-wave (CW) squeezed light is essentialfor integrating quantum processors with time-domain multiplexing (TDM) by usingoptical delay line interferometers. Here, we utilize a single-pass opticalparametric amplifier (OPA) based on a single-spatial-mode periodically poledZnO:LiNbO3 waveguide, which is directly bonded onto a LiTaO3 substrate. Thesingle-pass OPA allows THz bandwidth, and the absence of higher-order spatialmodes in the single-spatial-mode structure helps to avoid degradation ofsqueezing. In addition, the directly bonded ZnO-doped waveguide has durabilityfor high-power pump and shows small photorefractive damage. Using thiswaveguide, we observe CW 6.3-dB squeezing at 20-MHz sideband by balancedhomodyne detection. This is the first realization of CW squeezing with asingle-pass OPA at a level exceeding 4.5 dB, which is required for thegeneration of a two-dimensional cluster state. Furthermore, the squeezed lightshows 2.5-THz spectral bandwidth. The squeezed light will lead to thedevelopment of a high-speed on-chip quantum processor using TDM with acentimeter-order optical delay line.

Continuous-wave 6-dB-squeezed light with 2.5-THz-bandwidth from single-mode PPLN waveguide