Physics – Quantum Physics
Scientific paper
1995-01-16
Physics
Quantum Physics
5 pages and 5 figures
Scientific paper
10.1103/PhysRevA.51.3525
Using a two-photon interference technique, we measure the delay for single-photon wavepackets to be transmitted through a multilayer dielectric mirror, which functions as a ``photonic bandgap'' medium. By varying the angle of incidence, we are able to confirm the behavior predicted by the group delay (stationary phase approximation), including a variation of the delay time from superluminal to subluminal as the band edge is tuned towards to the wavelength of our photons. The agreement with theory is better than 0.5 femtoseconds (less than one quarter of an optical period) except at large angles of incidence. The source of the remaining discrepancy is not yet fully understood.
Chiao Raymond Y.
Steinberg Aephraim M.
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