Next Article in Journal
Identification and Model Update of the Dynamic Properties of the San Silvestro Belfry in L’Aquila and Estimation of Bell’s Dynamic Actions
Previous Article in Journal
IMPAβ: Incremental Modal Pushover Analysis for Bridges
Previous Article in Special Issue
Analysis of Hybrid Vector Beams Generated with a Detuned Q-Plate
Open AccessArticle

Ultrashort Vortex Pulses with Controlled Spectral Gouy Rotation

1
Max Born Institute for Nonlinear Optics and Short-Pulse Spectroscopy, 12489 Berlin, Germany
2
HOLOEYE Photonics AG, 12489 Berlin, Germany
3
IMTEK-Department of Microsystems Engineering, University of Freiburg, 79110 Freiburg im Breisgau, Germany
*
Author to whom correspondence should be addressed.
Appl. Sci. 2020, 10(12), 4288; https://doi.org/10.3390/app10124288
Received: 29 May 2020 / Revised: 16 June 2020 / Accepted: 18 June 2020 / Published: 22 June 2020
(This article belongs to the Special Issue Ultrafast Vortex Pulses)
Recently, the spatio-spectral propagation dynamic of ultrashort-pulsed vortex beams was demonstrated by 2D mapping of spectral moments. The rotation of characteristic anomalies, so-called “spectral eyes”, was explained by wavelength-dependent Gouy phase shift. Controlling of this spectral rotation is essential for specific applications, e.g., communication and processing. Here, we report on advanced concepts for spectral rotational control and related first-proof-of-principle experiments. The speed of rotation of spectral eyes during propagation is shown to be essentially determined by angular and spectral parameters. The performance of fixed diffractive optical elements (DOE) and programmable liquid-crystal-on silicon spatial light modulators (LCoS-SLMs) that act as spiral phase gratings (SPG) or spiral phase plates (SPP) is compared. The approach is extended to radially chirped SPGs inducing axially variable angular velocity. The generation of time-dependent orbital angular momentum (self-torque) by superimposing multiple vortex pulses is proposed. View Full-Text
Keywords: orbital angular momentum; vortex beams; femtosecond pulses; structured beams; spiral gratings; Gouy phase shift; spectral Gouy rotation; spectral anomalies orbital angular momentum; vortex beams; femtosecond pulses; structured beams; spiral gratings; Gouy phase shift; spectral Gouy rotation; spectral anomalies
Show Figures

Graphical abstract

MDPI and ACS Style

Liebmann, M.; Treffer, A.; Bock, M.; Wallrabe, U.; Grunwald, R. Ultrashort Vortex Pulses with Controlled Spectral Gouy Rotation. Appl. Sci. 2020, 10, 4288.

Show more citation formats Show less citations formats
Note that from the first issue of 2016, MDPI journals use article numbers instead of page numbers. See further details here.

Article Access Map by Country/Region

1
Search more from Scilit
 
Search
Back to TopTop