Phys. Rev. Lett. 100, 183603 (2008) [4 pages]Subnatural Linewidth Biphotons with Controllable Temporal LengthReceived 31 December 2007; published 8 May 2008 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. © 2008 The American Physical Society URL:
http://link.aps.org/doi/10.1103/PhysRevLett.100.183603
DOI:
10.1103/PhysRevLett.100.183603
PACS:
42.50.Gy, 37.10.Gh, 42.50.Dv, 42.65.Lm
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