Accession Number:

ADA478138

Title:

Slow and Fast Light

Descriptive Note:

Book chapter

Corporate Author:

ROCHESTER UNIV NY INST OF OPTICS

Personal Author(s):

Report Date:

2001-09-24

Pagination or Media Count:

41.0

Abstract:

Recent research has established that it is possible to exercise extraordinary control of the velocity of propagation of light pulses through a material system. Both extremely slow propagation much slower than the velocity of light in vacuum and fast propagation exceeding the velocity of light in vacuum have been observed. This article summarizes this recent research, placing special emphasis on the description of the underlying physical processes leading to the modification of the velocity of light. To understand these new results, it is crucial to recall the distinction between the phase velocity and the group velocity of a light field. These concepts will be defined more precisely below for the present we note that the group velocity gives the velocity with which a pulse of light propagates through a material system. One thus speaks of fast or slow light depending on the value of the group velocity v sub g in comparison to the velocity of light c in vacuum.

Subject Categories:

  • Optics

Distribution Statement:

APPROVED FOR PUBLIC RELEASE