Observation of Optical Precursors at the Biphoton Level

J. F. Chen, Heejeong Jeong, M. M. T. Loy +1 more

Heejeong Jeong

Shengwang Du, Chinmay Belthangady, Pavel Kolchin +2 more

We describe the observation of a sharp leading-edge spike in a biphoton wave packet that is produced using slow light and measured by two-photon correlation. Using the stationary-phase approximation we characterize this spike as a Sommerfeld-Brillouin precursor resulting from the interference of low- and high-frequency spectral components.

Shengwang Du, Chinmay Belthangady, Pavel Kolchin +2 more

We describe the observation of a sharp leading-edge spike in a biphoton wave packet that is produced using slow light and measured by two-photon correlation. Using the stationary-phase approximation we characterize this spike as a Sommerfeld-Brillouin precursor resulting from the interference of low- and high-frequency spectral components.

Bahaa E. A. Saleh

Shengwang Du, Pavel Kolchin, Chinmay Belthangady +2 more

This Letter describes the generation of biphotons with a temporal length that can be varied over the range of 50-900 ns, with an estimated subnatural linewidth as small as 0.75 MHz. We make use of electromagnetically induced transparency and slow light in a two-dimensional magneto-optical trap with an optical depth as high as 62. We report a sharp leading edge spike that is a Sommerfeld-Brillouin precursor, as observed at the biphoton level.