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

Using a two-photon interference technique, we measure the delay forsingle-photon wavepackets to be transmitted through a multilayer dielectricmirror, which functions as a ``photonic bandgap'' medium. By varying the angleof incidence, we are able to confirm the behavior predicted by the group delay(stationary phase approximation), including a variation of the delay time fromsuperluminal to subluminal as the band edge is tuned towards to the wavelengthof our photons. The agreement with theory is better than 0.5 femtoseconds (lessthan one quarter of an optical period) except at large angles of incidence. Thesource of the remaining discrepancy is not yet fully understood.Comment: 5 pages and 5 figure

Subfemtosecond determination of transmission delay times for a dielectric mirror (photonic band gap) as a function of the angle of incidence