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

Photon detection with quantum-level sensitivity is particularly challengingin the terahertz regime (0.1-10 THz), which contains ~98% of all the photonsexisting in the universe. Near-quantum-limited terahertz spectrometry has sofar only been possible through the use of cryogenically cooled superconductingmixers as frequency downconverters. Here we introduce a spectrometry schemethat uses plasmonic photomixing for frequency downconversion to offerquantum-level sensitivities at room temperature for the first time. Frequencydownconversion is achieved by mixing terahertz radiation and a heterodyningoptical beam with a terahertz beat frequency in a plasmonics-enhancedsemiconductor active region. We demonstrate spectrometer sensitivities down to3 times the quantum-limit at room temperature. With a versatile design capableof broadband spectrometry, this plasmonic photomixer has broad applicability toquantum optics, chemical sensing, biological studies, medical diagnosis, highdata-rate communication, as well as astronomy and atmospheric studies.

Room Temperature Terahertz Spectrometer with Quantum-Level Sensitivity