Roadmap on spatiotemporal light fields

Y Shen, Q Zhan, LG Wright, DN Christodoulides… - Journal of …, 2023 - iopscience.iop.org
Spatiotemporal sculpturing of light pulse with ultimately sophisticated structures represents a
major goal of the everlasting pursue of ultra-fast information transmission and processing as …

Second-harmonic generation and the conservation of spatiotemporal orbital angular momentum of light

G Gui, NJ Brooks, HC Kapteyn, MM Murnane… - Nature Photonics, 2021 - nature.com
Light with spatiotemporal orbital angular momentum (ST-OAM) is a recently discovered type
of structured and localized electromagnetic field. This field carries characteristic space–time …

Generation of extreme-ultraviolet beams with time-varying orbital angular momentum

L Rego, KM Dorney, NJ Brooks, QL Nguyen, CT Liao… - Science, 2019 - science.org
INTRODUCTION Light beams carry both energy and momentum, which can exert a small
but detectable pressure on objects they illuminate. In 1992, it was realized that light can also …

Characterization of extreme ultraviolet vortex beams with a very high topological charge

AK Pandey, A de las Heras, T Larrieu… - ACS …, 2022 - ACS Publications
Recent developments of high harmonic generation (HHG) have enabled the production of
structured extreme-ultraviolet (EUV) ultrafast laser beams with orbital angular momentum …

Speckle-learned convolutional neural network for the recognition of intensity degenerate orbital angular momentum modes

V Raskatla, PS Badavath, V Kumar - Optical Engineering, 2023 - spiedigitallibrary.org
Intensity degenerate orbital angular momentum (OAM) modes are impossible to recognize
by direct visual inspection even using available machine learning techniques. We are …

Coherent Fourier scatterometry using orbital angular momentum beams for defect detection

B Wang, M Tanksalvala, Z Zhang, Y Esashi… - Optics …, 2021 - opg.optica.org
Defect inspection on lithographic substrates, masks, reticles, and wafers is an important
quality assurance process in semiconductor manufacturing. Coherent Fourier scatterometry …

Measuring laser beam quality, wavefronts, and lens aberrations using ptychography

M Du, L Loetgering, KSE Eikema, S Witte - Optics Express, 2020 - opg.optica.org
We report on an approach for quantitative characterization of laser beam quality, wavefronts,
and lens aberrations using ptychography with a near-infrared supercontinuum laser …

Temporal and spectral multiplexing for EUV multibeam ptychography with a high harmonic light source

NJ Brooks, B Wang, I Binnie, M Tanksalvala… - Optics …, 2022 - opg.optica.org
We demonstrate temporally multiplexed multibeam ptychography implemented for the first
time in the EUV, by using a high harmonic based light source. This allows for simultaneous …

Generation and characterization of focused helical x-ray beams

L Loetgering, M Baluktsian, K Keskinbora… - Science …, 2020 - science.org
The phenomenon of orbital angular momentum (OAM) affects a variety of important
applications in visible optics, including optical tweezers, free-space communication, and 3D …

Topological charge measurement of a partially coherent vortex beam using dual cylindrical lenses with an arbitrary angle

X Lu, Z Wang, X Lu, C Zhao, Y Cai - Photonics, 2023 - mdpi.com
For a partially coherent Laguerre–Gaussian (PCLG) vortex beam, information regarding the
topological charge (TC) is concealed in the cross-spectral density (CSD) function phase …