Colloquium: Dr. Sang-Hyun Oh | University of Minnesota
In-Person PHYS 401
Location
Physics : 401
Date & Time
April 19, 2023, 3:30 pm – 4:30 pm
Description
TITLE: Pushing the Limits of Nanofabrication for Next-Generation Sensing and Imaging
ABSTRACT: In this research seminar, we will showcase unconventional nanofabrication techniques that have been developed by our team, including template stripping [1,2] (with David Norris) and atomic layer lithography [3]. Template stripping has enabled facile, silicon-template-based replication of ultrasmooth patterned metals, ultrasharp metallic tips, and high-Q resonators for graphene plasmonics. On the other hand, atomic layer lithography has enabled wafer-scale fabrication of metallic electrodes with gaps as small as 1 nm. These building blocks have been used to engineer advanced systems such as nanophotonic biosensors [4], quantum-dot-enhanced terahertz CMOS cameras [5], and wirelessly powered microfluidic biochips [6]. We will present our vision for future directions, including the development of quantum-dot enhanced cameras, portable diagnostic chips, and the integration of silicon photonics with nanoscale light sources and detectors.
Key publications: [1] P. Nagpal, N.C. Lindquist, S.-H. Oh, D.J. Norris, Science 325, 594 (2009); [2] I.-H. Lee et al., Nature Nano 14, 313 (2019); [3] D. Yoo et al., Nature Photonics 15, 125 (2021); [4] H. Altug, S.-H. Oh, S.A. Maier & J. Homola, Nature Nano 17, 5 (2022); [5] J. Shi et al., Nature Nano 17, 1288 (2022) [6] C.T. Ertsgaard et al., Nature Comm. 14, 103 (2023).
