Pulse propagation at negative group velocity in a transparent medium

A. Dogariu, A. Kuzmich, L. J. Wang

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

Summary form only given. We use gain-assisted linear anomalous dispersion to demonstrate superluminal light pulse propagation with a negative group velocity through a transparent atomic medium. We place two Raman gain peaks closely to obtain an essentially lossless anomalous dispersion region that results in a superluminal group velocity. The group velocity of a pulse in this region exceeds c and can even become negative,while the shape of the pulse is preserved. We measured a negative group velocity index of ng=-315(±5). Experimentally, a light pulse propagating through the spin-polarized atomic vapor cell exits from it earlier than propagating through the same distance in vacuum by a time difference that is 315 times of the vacuum light propagation time L/c=0.2 ns.

Original languageEnglish (US)
Title of host publicationTechnical Digest - Summaries of Papers Presented at the Quantum Electronics and Laser Science Conference, QELS 2001
PublisherInstitute of Electrical and Electronics Engineers Inc.
Pages7-8
Number of pages2
ISBN (Electronic)155752663X, 9781557526632
DOIs
StatePublished - Jan 1 2001
Externally publishedYes
EventQuantum Electronics and Laser Science Conference, QELS 2001 - Baltimore, United States
Duration: May 6 2001May 11 2001

Publication series

NameTechnical Digest - Summaries of Papers Presented at the Quantum Electronics and Laser Science Conference, QELS 2001

Other

OtherQuantum Electronics and Laser Science Conference, QELS 2001
CountryUnited States
CityBaltimore
Period5/6/015/11/01

All Science Journal Classification (ASJC) codes

  • Electrical and Electronic Engineering
  • Radiation

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    Dogariu, A., Kuzmich, A., & Wang, L. J. (2001). Pulse propagation at negative group velocity in a transparent medium. In Technical Digest - Summaries of Papers Presented at the Quantum Electronics and Laser Science Conference, QELS 2001 (pp. 7-8). [961776] (Technical Digest - Summaries of Papers Presented at the Quantum Electronics and Laser Science Conference, QELS 2001). Institute of Electrical and Electronics Engineers Inc.. https://doi.org/10.1109/QELS.2001.961776