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Zuo Fuchang, PhD,
senior engineer of Beijing Institute of Control Engineering, CASC,
chief designer, is mainly engaged in the opto-mechanical thermal
optimization design of space optical sensors, X-ray focusing
optics, high-energy particle detection, high-energy particle
shielding and other aspects, including opto-mechanical thermal
Multiphysics simulation, high-energy particle detection,
ultra-smooth metal mirror fabrication, optical system precision
assembly and other technical fields. He has ever developed and on-orbit
verified China's first soft X-ray grazing incidence focusing
optics, successively undertaken and completed a number of national
scientific research projects such as the National Key R&D
Program of China, and the foundation strengthening program of commission
of science and technology. More than 20 SCI/EI retrieval papers
were published, and 21 national invention patents were granted, 1
second prize of Beijing Technological Invention Award and 1 second
prize of Science and Technology Progress Award of CASC were
awarded.
Title: Grazing
Incidence Focusing Optics for Space X-ray Observation
Abstract. Scientific
researches and engineering applications in X-ray astronomy, pulsar
timing and navigation, and space X-ray communication make space
X-ray observation become a research highlight worldwide. X-rays
emitted from space cannot penetrate the thick atmosphere of the
Earth, so they cannot be detected on the surface of the Earth, and
instruments must be launched into outer space for observation. In
view of the low radiation flow, complex diffuse X-ray background,
and short X-ray wavelength of most space X-ray sources, grazing
incidence focusing optics has become the critical component of
space X-ray observation, which can effectively increase the
effective detection area, improve the signal-to-noise ratio, and
thus enhance the sensitivity of the X-ray telescope. The
development history of space X-ray observation since the discovery
of the first cosmic X-ray source was firstly reviewed, and the
characteristics of different kinds of telescopes were summarized.
The detectability of space X-ray sources and the demand for
detection instruments were discussed based on the sensitivity
analysis of space X-ray telescopes. Then, starting from the basic
theory and concepts, combined with our researches on X-ray grazing
incidence focusing optics in the last decade, different development
technical routes and key manufacturing processes of grazing
incidence focusing optics were emphasized and detailed. Finally,
the development trends of grazing incidence focusing optics meeting
future demands in the fields of basic space science research and
engineering applications were predicted.
Keywords: X-ray astronomy,
pulsar, grazing incidence optics, space observation, manufacturing
process
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Dr. Aurelian Marcu
Senior Scientific Researcher - National
Institute for Laser Plasma and Radiation Physics, Romanian
Research Interests:
Laser-matter
interaction processes and laser induced modiffications, Pulsed
electromagnetic fields and associated phenomena, Plume
filtering and special pulsed laser deposition
techniques, Nanostructure fabrication using pulsed laser
deposition and vapor-liguid-solid techniques
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Abstract
ZnO Nanostructures for
Sensing Applications
ZnO is a bio-compatible
wide band gap semiconductor material, with a broad range of
applications. It is also known to absorb various gases, so, gas
sensors are among its applications. There are different types
of sensors using a ZnO active layer surface, but, surface
acoustic wave (SAW) sensors are among most performant sensors,
not only due to their low detection limit but also for their
potential discriminative sensing performances. Their
functionality relays on an acoustic wave propagating through a
ZnO layer, further converted in an electric oscilation through
a piezoelectric surface. ZnO sorbtion process could be further
correlated with an electronic oscillatory signal, as a base of
the ‘gas sensing’ mechanism.
In the present work ZnO
nanostructures with a controlled morphology are grown on a
sensor active area using Vapour-Liquid-Solid (VLS) technique,
while pulsed laser ablation (PLA) is used as the process
particle source. VLS process is having the advantage of a grown
process controlled by the catalyst droplet. Thus, not
only the spatial placement of the grown structures could be
chosen, but also nanostructure morphology could be controlled
by the catalyst droplet. On the other hand the PLA could provide
a controlled source of particles in terms of purity and size
(through some special ablation techniques) giving the
possibility of controlling grown nanostructure morphology as
well.
ZnO nanostructure
performances in gas detection were tested for hydrogen isotopes,
and, a direct corelation of SAW sensor detection performances
and nanostructure characteristics could be established. In
parallel, ZnO gas sorbtion theoretical parameters were modeled
using molecular dynamic simulations and a better understanding
of the experimental results could be achieved. A discussion of
potential limitations and further possible sensor developments
is also presented.
Keywords: ZnO
nanostructures, SAW Sensors, Gas sorbtion, PLD/VLS,
Acknowledgements: This
work was supported by a grant of the Romanian Ministry of
Education and Research, CNCS – UEFISCDI, PCE 93/2021
PN-III-P4-ID-PCE-2020-1822, within PNCDI III and Romanian
National NUCLEU Program LAPLAS VI–contract no. 16N/2019
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Dr. Bangshan
Sun
Postdoc
Research Associate, Department of Engineering Science,
University of Oxford, UK
Research
Interests:
His
research work is focused on developing advanced photonic
devices by using adaptive optics based ultrafast laser
micro-fabrication.
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Dr. Sun completed his M.Eng and B.Eng
degrees from Fudan University in Shanghai China. He
received his DPhil degree from the University of Oxford in
2016, where he completed his DPhil research study by using
only two years. He then undertook 9-month research in the
Institute of Photonic Technologies before joining Morgan
Stanley working as a quantitative strategist for three
years. His works have been published in Nature: Light
Science & Applications, Applied Physics Letters, Optics
Express etc.
He decided to pursue his academic
dream in 2019 when he quit his position as well as a
promotion in Morgan Stanley and joined HHMI Janelia
research campus conducting research in the super-resolution
microscope. He joined back to Prof. Booth’s group in 2020
following the desire to conduct research in high-impact new
frontiers.
Abstract Photonic Devices for Quantum
Applications
Ultrafast laser micro-machining has
been used as a great tool with a wide range of applications
in past decades. In particular, it is possible to create
advanced photonic chips which are composed of
three-dimensional optical waveguide arrays. In this talk, I
will present several high-performance novel photonic
devices which can be applied to various quantum
applications, including adiabatic mode converters for
entangled quantum photon sources, superior integrated
hardware for optical addressed trapped ion quantum
computers, and so on. I will show that, with the most
recent new fabrication techniques combining advanced phase
engineering by adaptive optics, new capabilities can be
enabled for these devices which promise high potential in
quantum engineering.
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