• Technical Conference: 

    09 – 14 May 2021

  • Exhibition: 

    10 – 14 May 2021

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FF2K

Novel Tools for Ultrafast Science - Structured Light and Waveform Synthesis

Presider: Alexandra Landsman, ETH Zurich

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Presentations

Controlling the Temporal Evolution of Spin and Orbital Angular Momentum in Ultrashort Light Pulses (FF2K.1)
Presenter: Laura Rego Cabezas, Grupo de Investigación en Aplicaciones del Láser y Fotónica, Universidad de Salamanca

We present the generation of extreme-ultraviolet beams with a spin or orbital angular momentum that changes along time. Their angular momentum is controlled by taking advantage of the properties of the high-order harmonic generation process.

Authors:Laura Rego Cabezas, Grupo de Investigación en Aplicaciones del Láser y Fotónica, Universidad de Salamanca

  Paper

Observation of Toroidal Light Pulses (FF2K.2)
Presenter: Apostolos Zdagkas, University of Southampton


We report on the observation of optical and terahertz non-transverse, non-separable electromagnetic pulses of toroidal topology that are propagating counterparts of the localized toroidal dipoles launched from toroidal emitter metasurfaces excited by conventional laser pulses.

Authors:Apostolos Zdagkas, University of Southampton / Yijie Shen, University of Southampton / Shankar Pidishety, University of Southampton / Cormac McDonnell, Tel-Aviv University / Junhong Deng, Southern University of Science and Technology / Guixin Li, Southern University of Science and Technology / Nikitas Papasimakis, University of Southampton / Tal Ellenbogen, Tel-Aviv University / Nikolay Zheludev, University of Southampton

  Paper

Ultrafast Optical Rotation: Highly Sensitive Enantio-Discrimination With Controlled Few-Cycle Optical Pulses (FF2K.3)
Presenter: David Ayuso, Max-Born-Institut

We introduce ultrafast optical rotation: a highly efficient method for chiral discrimination using few-cycle pulses. Sub-cycle optical control enables full control over the enantio-sensitive response of matter in a molecule-specific manner and on ultrafast timescales.

Authors:David Ayuso, Max-Born-Institut / Andres Ordonez, Max-Born-Institut / Misha Ivanov, Max-Born-Institut / Olga Smirnova, Max-Born-Institut

  Paper

Reconfigurable Semiconductor Currents Driven by Ultrafast Coherent Control With Structured Light (FF2K.4)
Presenter: Shawn Sederberg, University of Ottawa

We apply femtosecond pulses with vectorized or structured spatial modes to coherent control of currents. We excite and measure complex and reconfigurable current patterns in a semiconductor, with an emphasis on generating magnetic fields.

Authors:Shawn Sederberg, University of Ottawa / Kamalesh Jana, University of Ottawa / Katherine Herperger, University of Ottawa / Paul Corkum, University of Ottawa

  Paper

Soft X-ray Attosecond Control via Parametric Waveform Synthesis (FF2K.5)
Presenter: Miguel Silva Toledo, Deutsches Elektronen-Synchrotron DESY

Soft X-ray high-harmonic continua reaching 0.2 keV are observed in neon at 300 mbar, using tailored fields from a parametric waveform synthesizer. Waveform-controlled continua show signatures of isolated attosecond pulse generation with distinct spectral envelopes.

Authors:Miguel Silva Toledo, Deutsches Elektronen-Synchrotron DESY / Fabian Scheiba, Deutsches Elektronen-Synchrotron DESY / Roland Mainz, Deutsches Elektronen-Synchrotron DESY / Yudong Yang, Deutsches Elektronen-Synchrotron DESY / Giovanni Cirmi, Deutsches Elektronen-Synchrotron DESY / Giulio Rossi, Deutsches Elektronen-Synchrotron DESY / Franz Kärtner, Deutsches Elektronen-Synchrotron DESY

  Paper

1.1-GW 213-as Soft-x ray Isolated Attosecond Pulse Created by a Fully Stabilized 50-mJ Three-Channel Optical Waveform Synthesizer (FF2K.6)
Presenter: Bing Xue, RIKEN

A GW-scale isolated attosecond pulse is demonstrated by a fully stabilized 50-mJ three-channel waveform synthesizers. Isolated pulse duration with 213-as, 0.24-μJ is experimentally characterized by the FROG-CRAB method with a 10-Hz repetition rate.

Authors:Bing Xue, RIKEN / Katsumi Midorikawa, RIKEN / Eiji Takahashi, RIKEN

  Paper