An absorption-free and Doppler-improved optical waveguide for diffractionless light propagation.

Abstract:

:We propose a novel scheme to realize an optical waveguide induced by an active Raman gain (ARG) process in a four-level N-type atomic system. Because of the nature of the ARG, there are two distinct features related to the waveguide: i) It is not absorptive, on the contrary, weak gain is presented; ii) It can be improved by the Doppler effect in the sense that the dispersion is enhanced while the gain is further reduced. This is in sharp contrast to the previously considered schemes where usually the optical induced waveguide is passive and is severely attenuated by the Doppler effect. We then study the paraxial light propagation in the waveguide which shows that the propagation dynamics is lossless and diffractionless.

journal_name

Sci Rep

journal_title

Scientific reports

authors

Cui N,Gan Z,Zhang L

doi

10.1038/s41598-017-14456-z

subject

Has Abstract

pub_date

2017-10-27 00:00:00

pages

14198

issue

1

issn

2045-2322

pii

10.1038/s41598-017-14456-z

journal_volume

7

pub_type

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