| Keynote Speakers |
Prof. Malgorzata Kujawinska Warsaw University of Technology, Poland | |
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Speech Title:
Quantitative Phase Imaging: metrological challenges
and opportunities
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Abstract:
Quantitative Phase Imaging (QPI) refers to a number of
label-free 2D and 3D microscopy techniques that provide contrast by quantifying
the phase shifts in the wavefront when light propagates through a transparent
specimen. QPI has emerged as a powerful tool in
advanced biomedical research. .
In this talk I will discuss the recent progress and trends in development and
applications of QPI systems. This includes improved algorithms and hardware for
measurement of scattering objects, combining coherent and incoherent light QPI
methods into , multimodal measurement systems, as well as applying AI solutions
to support better reconstruction of biophysical parameters of cells and
tissues. Emphasis will be given to metrology aspects of 2D and 3D QPI as this
problem is most often overlooked in both research and commercial systems. Large
variety of phantoms (produced by means of the two-photon polymerization) that
strive to mimic biomedical specimens and their interaction with light will be
presented, ultimately providing tool for validation and benchmarking a variety
of QPI systems. The approach to metrology presented across this work is
well-suited for rapidly progressing field of QPI and can be a catalyst for
finding new ways of investigating biomedical and engineering specimens. | |
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About the Speaker:
Malgorzata Kujawinska, received her PhD degree in Applied Optics from Warsaw University of
Technology (WUT), Poland. She is a professor and head of Quantitative Phase
Imaging Team at WUT, international
expert in applied optics and optical metrology for engineering, biomedical, and
cultural heritage applications. She is SPIE and OPTICA Fellow, past SPIE
President, recipient of SPIE Chandra S. Vikram Award in Optical Metrology and SPIE Denis Gabor Award in Diffractive Optics.
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Prof. Ibrahim Abdulhalim Ben-Gurion University of the Negev, Beer-Sheva 8410501, Israel. | |
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Speech Title:
Liquid Crystal Devices for Photonic Applications: Fast
Light Modulation, Imaging, and Energy Saving
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Abstract:
Several
photonic non-display applications of liquid crystals require higher performance
in terms of speed, wide tunability, and high contrast. However, achieving both
fast response times and strong electro-optic effects is inherently challenging,
as these two characteristics typically compete against each other—a limitation
rooted in the linear response theorem. We have been developing several
strategies to mitigate the problem lately: (i) tailored design to the specific
application, (ii) combining LCs with metasurfaces, (iii) designing nanocavity
resonant structures where the optical field is concentrated in a region where
the LC responds faster to external perturbations. I will present the concepts and
performance of several devices we have developed, which are suitable for fast
spectral imaging, interferometric imaging, fast polarimetric imaging, optical
telecommunications, smart windows for energy saving, and integrated photonics.
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About the Speaker:
Ibrahim Abdulhalim has
been a Professor of Electrooptics and Photonics Engineering at Ben-Gurion
University since 2005, where he also served as the Head of the Department from
2007 to 2015. He has held positions at several academic institutions and
companies, including the OCSC at UC Boulder, the ORC at Southampton University,
the Thin Films Center at the University of Western Scotland, KLA-Tencor, Nova,
and GWS Photonics. His current research focuses on liquid crystal devices for photonic
applications, tunable nanophotonic metamaterials for biosensing and energy
conservation, and optical imaging. He has published over 300 articles, authored
two books, contributed 13 book chapters, and holds 25 granted patents.
Abdulhalim is a Fellow of the Institute of Physics (IoP) and SPIE, a Senior
Member of OPTICA, and a member of the International Liquid Crystal Society
(ILCS). He has served on the editorial boards of several journals and is
currently an Associate Editor for the Journals of Sensors and Biosensors
and a Topical Editor for Applied Optics. Abdulhalim has supervised over
50 graduate students throughout his career, including M.Sc., Ph.D., and
postdoctoral researchers. He is also the founder of two companies: Photonicsys,
specializing in miniature plasmonic sensors, and Photoliqsys, which develops
advanced liquid crystal devices.
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| Prof.
Gerard Wysocki
Professor of Electrical and Computer Engineering at Princeton University, NJ United States of America | |
| Speech Title: 3D chemical plume detection and localization using UAV-assisted remote laser spectroscopic sensing | |
Abstract:
Fast detection and the ability to locate the
sources of volatile chemicals play a critical role in a variety of high
priority sensing applications. Predicting 3D trace-gas flow in environmental
chemical sensing applications, detecting emissions from plants or localized
emissions of pesticides in agriculture, identifying dangerous emissions or gas
spills, and assuring safety of first responders require versatile 3D chemical
sensing and localization technology. We have already demonstrated and
field-tested a set of techniques based on stand-off,
open-path laser spectroscopic sensors with a capability of actively
tracking a mobile retroreflector mounted on a UAV (a drone, or any other
vehicle) that enabled tomographic-like reconstruction of trace-gas plumes. The
early technology leveraged a single-frequency semiconductor laser tuned to a
methane transition and it enabled methane plume source location to within 1 m
as well as estimation of emission rates to within ± 30%. Unlike other
localization approaches reported in the literature utilizing drones carrying point
trace-gas sensors, the stand-off drone techniques are not restricted by the
payload limits imposing severe constrains on the quality of point-sensors used.
In the next development stage of this UAV-assisted remote sensing technology, we
address the challenging problem of detecting, localizing and quantifying
emissions of a multi-chemical gas plumes. To achieve sensitive multi-chemical
detection we leverage a novel dual-comb spectroscopic (DCS) sensor platform
based on chip-scale semiconductor quantum cascade laser frequency combs
(QCL-FCs) operating in the mid-infrared (mid-IR) molecular fingerprint spectral
region. This UAV-assisted multi-chemical trace-gas plume detection technology has
a potential to enable three-dimensional (3D) tomographic plume localization of
many chemicals simultaneously.
In this talk, he will present drone-assisted stand-off spectroscopic 3D chemical plume detection using both single-frequency semiconductor lasers as well as mid-IR QCL-FCs coupled with drone-assisted plume reconstruction techniques to localize and estimate the flow rate of chemical leaks. A variety of controlled laboratory experiments and field tests will be presented, and recent progress and outlook for this sensing technology with potential real-world applications will be discussed | |
About the Speaker:
Gerard Wysocki is a Professor of Electrical and Computer Engineering at Princeton
University. He received his PhD degree in physics in 2003 from Johannes Kepler
University in Linz, Austria. Since 2008 he leads his Princeton University Laser
Sensing (PULSe) research group in the areas of tunable mid-IR/THz lasers and applied spectroscopy. Wysocki
conducts research that spans developments of modern mid-IR/THz laser sources, ultra-sensitive
optical sensing techniques, advanced signal processing, and fundamental
light-matter interactions. He pioneered 3D tomographic hard target LIDAR
systems based on new molecular dispersion spectroscopy techniques, developed
mid-IR remote spectroscopic detection and hyperspectral imaging systems based
on frequency combs. For his scientific contributions and technical innovations
Wysocki has received multiple awards including the NSF CAREER Award, the Masao
Horiba Award for contributions to analytical science, and the Peter Werle Early
Career Scientist Award. He is a Fellow of Optica (former OSA), and a member of
APS, and SPIE. He also serves as an Associate Editor of Optica, and Co-editor
of Applied Physics B.
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