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Review: Self-Organization in Cold Atoms Mediated by Diffractive Coupling.

Review on self-organization with single-mirror feedback “Self-Organization in Cold Atoms Mediated by Diffractive Coupling” in atoms

Jun 23, 2021
Review: Self-Organization in Cold Atoms Mediated by Diffractive Coupling.
Magnetic phase diagram of light-mediated spin structuring in cold atoms

A new article was published in Optica.

Oct 18, 2018
Magnetic phase diagram of light-mediated spin structuring in cold atoms
Spontaneous light-mediated magnetism in cold atoms

A new article was published in Communications Physics.

Oct 7, 2018
Spontaneous light-mediated magnetism in cold atoms
Mechanism behind the Cavity Soliton Laser
Feedback configuration The external cavity contains a two lens telescope, which is adjusted to infinity, i.e. the cavity is self-imaging and all transverse modes are degenerate. As a result, there is a 1:1 feedback for every point in the VCSEL onto itself.
Jan 1, 2018
Mechanism behind the Cavity Soliton Laser
Mechanism of Spatial Instability
A laser beam with an initially homogeneous phase and amplitude distribution is incident on a medium whose refractive index depends on the light intensity. If there is a fluctuation in the refractive index distribution of the medium, the transmitted wave will be phase-modulated.
Jan 1, 2018
Optical Pumping
Optical pumping denotes the redistribution of population within atomic multiplets by state-selective optical excitation in an electronically excited state and the subsequent spontaneous emission. In most cases the considered multiplets consist of Zeeman substates.
Jan 1, 2018
Self-organization
What is the reason that an initially homogeneous system evolves spontaneously into a modulated, “structured” state? This intriguing question arises in many sciences, in nature as well as in the laboratory.
Jan 1, 2018
Self-organization
Talbot Effect
The Talbot-effect is a near field ‘self-imaging’ effect generic for certain wave equations like the paraxial wave equation and the Schrödinger equation. Any spatial modulation of period Λ of a plane carrier wave is reproduced after the Talbot-length $z_R= 2Λ^2/λ$.
Jan 1, 2018
Talbot Effect
MSCA-ETN ColOpt funded.

Thorsten Ackemann coordinates MSCA-European Training Network ColOpt (Collective Effects and Optomechanics in Ultra-cold Matter)

Jan 1, 2017
MSCA-ETN ColOpt funded.
Observation of self-organized hexagons via optomechanically nonlinearities.

Observation of self-organized hexagons via optomechanically nonlinearities reported in Nature Photonics, see News Release and coverage in Optics & Photonics News.

Mar 23, 2014
Observation of self-organized hexagons via optomechanically nonlinearities.