After a review of the basic concepts of slow and fast light, recent advancements based on
nonlinear wave‐mixing processes are described. As a nonlinear medium, the authors focus …

We demonstrate superluminal light propagation using two frequency multiplexed pump
beams to produce a gain doublet in a photorefractive crystal of Ce: BaTiO_3. The two gain …

Subluminal and superluminal propagation of a light pulse in Kerr materials has been
investigated. Group velocities as slow as much less than 1 mm per second to as fast as …

We develop a systematic formalism to study the propagation of a guided probe light field
along a nanofiber embedded in a cold atomic gas. We derive a general axial propagation …

We experimentally observe an ultralow effective group velocity of 0.9 cm/s of light pulses
using the two-wave mixing process in an Sn_2P_2S_6 (SPS): Te crystal at a visible …

We demonstrate experimentally slow and fast light effects achieved simultaneously using
Raman gain and pump depletion in an atomic vapor. Heterodyne phase measurements …

Controlling the group velocity of light is a valuable resource for quantum and classical
optical processing and high performance sensor technologies. In this context, slow-light (SL) …

Halting and storing light by infinitely decelerating its speed, in the absence of any form of
external control, is extremely di±cult to imagine. Here we present a theoretical prediction of a …

By performing optical two-wave mixing in a liquid crystal light valve, we are able to slow
down optical pulses to group velocities as slow as a few tenths of mm/s, corresponding to a …

We develop a theory of the photorefractive nonlinear response for Sn_2P_2S_6 crystals.
The theory incorporates two types of charge carrier (optically active and passive), provides …