Microscale Prints With Structural Color for Anti-Counterfeiting

Monday, June 13,2022 I 10 a.m. WIB
RMT 2-9, Labtex X
Open for ITB students and staff!

Speaker : Joel Yang, Provost’s Chair Professor and Associate Professor, Singapore University of Technology and Design (SUTD)

Here’s more info on the speaker’s research topic:

Website lab

https://people.sutd.edu.sg/~joel_yang/

Google Scholarship

https://scholar.google.com/citations?user=-tCUvVAAAAAJ&hl=en

Research Talk

Counterfeiting is a growing global challenge, causing financial losses in excess of half a trillion dollars annualy and loss of lives, due to fake drugs, and critical components in systems. Unfortunately, optically-variable device (OVD) that have historically provided protection can now be easily replicated

Our group is working on developing new optical solutions that lead to next-generation anti-counterfeiting tags. These arre machine-readable, easily-recognizable, contain multiple convert information sets, and physically unclonable functions in a single print. Crucially, we utilize a broad range of the visible spectrum and produce structural colors that are vibrant out of a range of materials, e.g. metals, semiconductor, dielectrics and polymers. That platform technologies are in numerical simulations and designs of structural color, nanoscale printing using electron-beam lithography (EBL) and two-photon polymerization lithography (TPL), which enables 3D printing with 100nm feature sizes.

Examples of anti-counterfeiting tags include microprints incorporating upconverted fluorescent particles (Figure 1) and light-field prints consisting of 3D printed microlenses with structural colors to produce up to 225 distinct images within a single print (Figure 2).


Jeol Yang

Provost’s Chair Professor and Associate Professor.
Singapore University of Technology and Design (SUTD)

Joel Yang received his Master of Science (2005) and PhD (2009) degrees from the Massachusetts Institute of Technology, Department of Electrical Engineering and Computer Science. He is the Provost’s Chair Professor and Associate Professor in the Engineering Product Development pillar at the Singapore University of Technology and Design (SUTD) and hold a joint appointment as Principal Scientist I at the Institute of Materials Research and Engineering (IMRE) of A*STAR.

He is recognized for pioneering work in plasmonic color printing, achieving record-level printing resolution at 100,000 dpi and credited for the widely-used “salty-developer” to improve the resolution of electron beam lithography. His research interests include Nanoplasmonics, 2D and 3D printed nano optical design elements (NODE), and sub-10nm resolution lithography.