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The Future IMRE Technologies Webinar

Our speakers

Dr AARON LAU, IMRE, A*STAR

Quantum Device Engineering

Abstract
2D semiconductors have the potential for quantum applications, but progress is severely hindered by contact and dielectric engineering. Aaron will discuss IMRE's efforts in establishing high-quality contacts at cryogenic temperatures. Aaron will reveal new insights into the nature of metal/2D semiconductor interface and carrier quantum transport. Next, he will discuss their work on dielectric influence on carrier transport, where they showed that carrier mobilities are due to a frequently overlooked factor, interface roughness. Aaron will also report the first gate-defined grown bilayer WS2 quantum dot, a key breakthrough towards 2D semiconductors-based quantum devices.

Biography
Dr. Aaron Lau is an experimental quantum scientist who engineers and studies next-generation materials and devices to understand the physics of low-dimensional systems. He graduated from the National University of Singapore in 2012 with a Bachelor of Science (Physics), first-class honours, before receiving the A*STAR Graduate Scholarship to pursue his Ph.D. at the University of Oxford. There, he worked on quantum transport through single-molecule electronics. He returned to A*STAR IMRE in 2017 where he now works on atomically thin materials for quantum applications.

Dr. Calvin Wong, IMRE, A*STAR

Quantum Nanoprobe and Devices

Abstract
Defects in semiconducting materials are expected to influence the electrical properties of metal/semiconductor contacts, and ultra-high vacuum scanning probe microscopes are useful techniques that can map out atomic lattices and defects of a material surface. In this webinar, Calvin will talk about the scanning tunneling microscopes available in his lab at IMRE and discuss a metal/semiconductor device where Schottky barrier inhomogeneities can be resolved using a nanoprobing technique, such as balistic electron emission microscopy.

Biography
Dr. Calvin Wong obtained his B.Appl.Sc (Applied Chemistry) in 2013 and Ph.D. (Integrative Sciences and Engineering) with a focus on Physics in 2018 at the National University of Singapore. He is currently a Scientist at the Institute of Materials Research and Engineering, A*STAR where he is pursuing research in quantum materials characterisation and related fields. He is well versed in the fabrication and measurements of 2D material-based and Silicon-based devices and the characterisation of these materials using a scanning tunneling microscope, where he pokes at atoms using a very sharp stick to make them tell their story. He hopes to synergise his advanced characterisation techniques with quantum devices to better understand these materials and improve device performances.

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