Seminar Speaker: Pf. Wei-Chih Wang
Title:  Aerosol deposited PZT thin-film actuator fiber scanning system
Date: 2021/12/9 (Thursday) 3:30 pm – 5:20pm
Location: Engineering 5 Building B1 International Conference Hall (工程五館 B1 國際會議廳) 

Abstract:
Brue Lee once said, “Empty your mind, be formless, shapeless - like water. Now you put water into a cup, it becomes the cup, you put water into a
bottle, it becomes the bottle, you put it in a teapot, it becomes the teapot. Now water can flow or it can crash. Be water, my friend.” This is Bruce Lee’s
most famous quote and conveys his most important fighting philosophy: adaptability, formless, shapeless. This is the philosophy and the type of
technology Micro Technology Laboratory (MTL) has been based on and working on using polymers since 1997. The lab focuses in two efforts: basic
scientific research in exploring advance material and structure with novel material properties (e.g. negative Poisson’s ratio, resistivity, permittivity,
permeability, zero mass, zero index, material changing phases) in polymer and engineering application in integration of current MEMS, polymer and
photonics technology in biomedical, industrial and military applications.

The talk will begin with an overview of the lab research and a summary of the past, current and future research efforts and opportunities in developing
various amorphous and metamorphous materials and structures for electromagnetic applications. This will follow by a talk on a more recent development
of a MEMS fiber scanning microscope using a lead-zirconium-titanate (PZT) bimorph push pull microactuator. The novelty of this research lies in its first
demonstration of image acquisition by this hybrid system- a chemically etched taper optical fiber waveguide and an aerosol jetted PZT thin-film bimorph
actuator on a stainless-steel substrate and its 2-D spiral scanning generated by this 1-D push pull actuator. Basic concept of the actuation, optical and
mechanical characteristics of the waveguide and actuator system will be discussed, and simulation and experimental results are compared and analyzed.
The results of a 5m linewidth line pattern and a 10 m linewidth a non-rectangular 2D pattern, moth wing image acquisition will also be presented.


Biography:
Associate Professor, Institute of Nanoegineering and Microsystems, National Tsinghua University

Adjunct Associate Professor, Power Mechanical Engineering, National Tsinghua University

Affiliated Associate Professor,Mechanical Engineering and Electrical Engineering, University of Washington

Wei-Chih Wang is currently a Associate Professor in Power Mechanical Engineering and Institute of Nanoengienering and Microsystems at the National
Tsinghua University and an affiliated Associate Professor in the Department of Mechanical Engineering and an Adjunct Research Associate Professor in
the Department of Electrical Engineering at the University of Washington. He graduated from University of Washington with a degree in electrical
engineering in 1996. He later received a postdoctoral fellowship for a DARPA funded piezoelectric MEMS project under Dr. Eun Sok Kim at the
University of Hawaii in 1996 and 1997. He has authored or co-authored over 220 technical publications, holds 25 US and World patents. His research
interests are in the area of developing polymer based micro sensors and actuators for industrial and biomedical applications. More recently, his work has
expanded to THz, IR and visible band 3-D metamaterials, and electromagnetic and electro-active polymer material study. He is currently a Senior member
of SPIE, a member of IEEE, Eta Kappa Nu and NIH review committee. He is also an associate editor and a member of the editorial board for the
International Journal of Optomechatronics and the Sensors & Transducers Journal and program committees for SPIE Smart Structures and Materials +
Nondestructive Evaluation and Health Monitoring and International Symposium on Optomechatronics Technologies (ISOT) since 2003 and 2009