Subnatural Linewidth Biphotons with Controllable Temporal Length

Shengwang Du, Pavel Kolchin, Chinmay Belthangady, G. Y. Yin, and S. E. Harris
Phys. Rev. Lett. 100, 183603 – Published 8 May 2008

Abstract

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.

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  • Received 31 December 2007

DOI:https://doi.org/10.1103/PhysRevLett.100.183603

©2008 American Physical Society

Authors & Affiliations

Shengwang Du*, Pavel Kolchin, Chinmay Belthangady, G. Y. Yin, and S. E. Harris

  • Edward L. Ginzton Laboratory, Stanford University, Stanford, California 94305, USA

  • *dus@stanford.edu

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Vol. 100, Iss. 18 — 9 May 2008

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