Lunch & Learn Monthly Seminar Series
"Advanced Manufacturing Techniques using Microsphere Lithography and Glass 3D Printing"
Dr. Chuang Qu
Post Doctoral Associate, KY Multi-Scale
This talk focuses on two bottom-up approaches in nano-manufacturing: Microsphere Photolithography (MPL) and additive manufacturing of glass.The cost-effective manufacturing of two-dimensional metamaterials (metasurfaces) over large areas is a critical issue that limits their implementations. The first part of the talk introduces MPL process as a potential solution for the costly fabrication procedures. This talk discusses the fabrication capabilities, process control, and potential applications of MPL. MPL uses a scalable self-assembled microsphere array as an optical element to focus collimated light to nanoscale photonic jets in a photoresist layer. The concept is applied to the fabrication of metasurfaces with engineered IR absorption (e.g. perfect absorption with multiband/broadband and wavelength/polarization dependences).
The physics of feature formation in MPL is studied with a development model. The model enables the identification of fabrication conditions to improve the resolution and flexibility for the MPL process. The potential for a reusable microsphere array in MPL process is discussed as well. The use of the MPL for the fabrication of metasurfaces, with application such as sensing and thermal management, is novel as is the modeling of the MPL process.
Additive manufacturing has been used for printing metals, plastics, and ceramics. The second part of this talk will briefly introduce our work on additive manufacturing of optically transparent glass component using a new filament fed process. The process can be applied inprinting optical elements such as cylindrical lens and gradient index optics.
Dr. Chuang Qu received his BE and ME in Thermal and Power Engineering from Dalian University of Technology, China in 2012 and 2014, respectively, and Ph.D. in Mechanical Engineering from Missouri University and Science and Technology in 2019. He is currently a Postdoctoral Associate in the department of Speed School Electrical & Computer Engineering at the University of Louisville for the Kentucky Multi-Scale Manufacturing and Nano Integration Node (KY MMNIN). His research focuses on nanomanufacuting, additive manufacturing, and heat transfer. Emphasis has been on microsphere photolithography (MPL), with application to IR/optical sensing elements as well as for energy harvesting. He authored and co-authored 6 journal papers and 8 conference papers during his Ph.D study.
KY Multi-Scale Manufacturing and Nano Integration Node