Bulletin of ANPA

Abstract submitted to ANPA Conference July 14–16, 2023

Volume 5, Number 1

Atomic, Molecular, Optical and Plasma Physics

Abstract ID: ANPA2023-N00022

Abstract:

ANPA2023-N00022: Spatiotemporal characterization of few-cycle Bessel- Gaussian and vector waveforms in the mid-infrared

Authors:

• Dipendra Khatri; University of Central Florida

• Yangyang Liu; Department of Physics, University of Central Florida, Orlando FL 32816

• Shima Gholam-Mirzaei; Joint Attosecond Science Laboratory (JASLab), National Research Council of Canada and University of Ottawa, Ottawa, Ontario K1A 0R6, Canada

• Tran-Chau Truong; CREOL, the College of Optics and Photonics, University of Central Florida, Orlando FL 32816

• Andre Staudte;

• Paul B Corkum and Michael Chini;

Spatiotemporal characterization of few-cycle Bessel-Gaussian and vector waveforms in the mid-infrared Dipendra Khatri1, Yangyang Liu1, Shima Gholam-Mirzaei2, Tran-Chau Truong1, Andre Staudte2, Paul B Corkum2 and Michael Chini1,3 1Department of Physics, University of Central Florida, Orlando FL 32816 2Joint Attosecond Science Laboratory (JASLab), National Research Council of Canada and University of Ottawa, Ottawa, Ontario K1A 0R6, Canada 3CREOL, the College of Optics and Photonics, University of Central Florida, Orlando FL 32816 Author e-mail address: dskhatri@knights.ucf.edu Abstract: Knowledge of the space-time properties of ultrafast laser pulses is necessary both for characterizing spatiotemporal distortions and for applications using structured beams. In the past, such space-time characterization has been achieved using either measurements of linear interference between an ‘unknown’ pulse and a well-characterized ‘reference’ pulse in the near-infrared and visible or using electro-optic sampling (EOS) in the THz spectral region. Very recently, EOS-based imaging techniques have been extended to the near-infrared, but this requires the synchronization of the unknown pulse with a few-femtosecond sampling pulse to achieve the necessary time resolution. Here, we demonstrate that a novel variant of TIPTOE (tunnel ionization with a perturbation for the time-domain observation of electric fields) capable of resolving three-dimensional (2D space + time) laser waveforms. By using multiphoton nonlinear excitation in a silicon-based CMOS image sensor as a sub-cycle “temporal gate”, we do the measurement of the full space, time, and polarization state of structured (Vector, and Bessel-Gaussian beams) few-cycle mid-infrared laser waveforms. The reversal of the electric field direction in adjacent Bessel rings, and radially polarized polarization-state of the vector beam is directly observed in the field-resolved measurement. The experiment is carried out using few-cycle mid-IR pulses centered near 3.4 μm, which are generated by nonlinear compression of multi-cycle pulses from an optical parametric amplifier (OPA).

To cite this abstract, use the following reference: https://anpaglobal.org/conference/2023/ANPA2023-N00022