KNI Special Seminar: Additive and Subtractive Manufacturing for Quantum Materials
Join the Kavli Nanoscience Institute on Friday, October 6 at 3 pm for a special seminar by former KNI Prize Postdoctoral Scholar Dr. Haozhe "Harry" Wang. Dr. Wang is now Assistant Professor in Electrical and Computer Engineering at Duke University. Dr. Wang's talk will describe his group's efforts in attaining Angstrom-precise additive manufacturing for 2D quantum materials.
The seminar will take place in 125 Steele Laboratory, with a reception to follow.
Additive and Subtractive Manufacturing for Quantum Materials
Nanofabrication imperfections are increasingly constraining the performance metrics of quantum devices. Addressing this challenge necessitates both additive and subtractive manufacturing techniques that offer Angstrom precision superior to current methodologies.
In this presentation, Dr. Wang will demonstrate his lab's pioneering efforts in attaining Angstrom-precise additive manufacturing for 2D quantum materials, utilizing advanced chemical vapor deposition and innovative 'smart' processes. As the intriguing physical properties of bilayer graphene expand, there remains a substantial gap in harnessing these findings for practical applications. This stems primarily from the constraints of top-down approaches yielding small flakes. In response, his team has successfully achieved layer-by-layer manufacturing in large-scale bilayer graphene, eliminating island impurities—a feat previously unattained in any 2D materials. Following this, they harness the Marangoni effect to facilitate 'autonomous' transfer, inducing a surface tension gradient in transfer liquids. Complementing these advancements, they integrate machine learning with Raman spectroscopy for 'smart' characterization with sub-nanometer precision.
Furthermore, Dr. Wang will discuss his lab's recent breakthroughs in subtractive manufacturing of nanomaterials with monolayer precision, tailored for quantum applications. Their investigation of atomic layer etching—a reversal process to the traditional atomic layer deposition—permits layer-by-layer surface engineering of nanomaterials. This serves to correct Angstrom-level flaws in photonic and electronic quantum devices. This technology has the potential to remedy Angstrom-scale imperfections in photonic and electronic quantum devices.
Dr. Haozhe "Harry" Wang is currently an Assistant Professor in Electrical and Computer Engineering at Duke University. Before joining Duke University in 2023, he was a Kavli Nanoscience Institute (KNI) Prize Postdoctoral Fellow at the California Institute of Technology. He earned his Ph.D. from MIT's EECS in 2020 and furthered his research as a postdoctoral scholar at MIT AeroAstro through 2021. Dr. Wang specializes in atomic layer engineering of electronic and quantum materials for advanced device applications. He has authored over 35 peer-reviewed publications including on prestigious journals such as Nature Photonics, Nature Energy, Nature Communications, and Matter. He has been recognized with the 2022 MRS Spring Meetings Best Poster Award, the 2021 KNI Prize Postdoctoral Fellowship, and the 2020 MIT Quantum Hackathon Creative Award.