Invite Speakers

Dr. Fuchang Zuo

Senior Engineer/Chief Designer, Beijing Institute of Control Engineering, China Aerospace Science and Technology Corporation (CASC)

Research Interests:

Opto-Mechanical Thermal Multiphysics Simulation, High-Energy Particle Detection, Ultra-Smooth Metal Mirror Fabrication, Glass Mirror Thermal Forming, Mirror Testing And Calibration, Optical System Precision Assembly and Other Technical Fields

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

 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


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

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.

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.

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.