Incoherent "Slow and Fast Light"
Abstract
We show experimentally that the effects of "slow and fast light" that are considered to be caused by spectral hole-burning under conditions of coherent population oscillations (CPO) can be universally observed with incoherent light fields on objects with the pure-intensity nonlinearity, when such an interpretation is inapplicable. As a light source, we used an incandescent lamp and as objects for study, a photochromic glass and a thermochromic coating. The response of the objects to intensity modulation of the incident light reproduced in all details the commonly accepted experimental evidences of the "light with a negative group velocity" and "ultraslow light". We come to conclusion that so far there are no experimental works providing evidence for real observation of the "CPO-based slow or fast light".
Cite
@article{arxiv.0907.4902,
title = {Incoherent "Slow and Fast Light"},
author = {V. S. Zapasskii and G. G. Kozlov},
journal= {arXiv preprint arXiv:0907.4902},
year = {2015}
}
Comments
10 pages and 8 figures