Optical parametric oscillation with distributed feedback in cold atoms


Autoria(s): Schilke, Alexander; Zimmermann, Claus; Courteille, Ph. W.; Guerin, William
Contribuinte(s)

UNIVERSIDADE DE SÃO PAULO

Data(s)

06/11/2013

06/11/2013

2012

Resumo

There is currently a strong interest in mirrorless lasing systems(1), in which the electromagnetic feedback is provided either by disorder (multiple scattering in the gain medium) or by order (multiple Bragg reflection). These mechanisms correspond, respectively, to random lasers(2) and photonic crystal lasers(3). The crossover regime between order and disorder, or correlated disorder, has also been investigated with some success(4-6). Here, we report one-dimensional photonic-crystal lasing (that is, distributed feedback lasing(7,8)) with a cold atom cloud that simultaneously provides both gain and feedback. The atoms are trapped in a one-dimensional lattice, producing a density modulation that creates a strong Bragg reflection with a small angle of incidence. Pumping the atoms with auxiliary beams induces four-wave mixing, which provides parametric gain. The combination of both ingredients generates a mirrorless parametric oscillation with a conical output emission, the apex angle of which is tunable with the lattice periodicity.

Alexander von Humboldt Foundation

Alexander von Humboldt foundation

Deutsche Forschungsgemeinschaft (DFG)

Deutsche Forschungsgemeinschaft (DFG)

Research Executive Agency

Research Executive Agency [PIRSES-GA-2010-268717]

Identificador

NATURE PHOTONICS, LONDON, v. 6, n. 2, supl. 4, Part 1-2, pp. 101-104, FEB, 2012

1749-4885

http://www.producao.usp.br/handle/BDPI/42483

10.1038/NPHOTON.2011.320

http://dx.doi.org/10.1038/NPHOTON.2011.320

Idioma(s)

eng

Publicador

NATURE PUBLISHING GROUP

LONDON

Relação

NATURE PHOTONICS

Direitos

restrictedAccess

Copyright NATURE PUBLISHING GROUP

Palavras-Chave #RB VAPOR #COHERENT #LASERS #OPTICS #PHYSICS, APPLIED
Tipo

article

original article

publishedVersion