Speaker: Inki Kim, Sungkyunkwan University

Time: 20:00-21:30 pm, April 18, 2023, GMT+8

Venue: Long press to identify the QR code and jump to the webpage!


Abstract:

Metamaterials or metasurfaces – materials that are engineered to have properties that are not found in natural materials – allow us to overcome physical limitations. Metasurface science is further not only expanding field of optics and photonics by providing ultra-compact and multifunctional flat optical devices, also resolves challenging problems in diverse sectors like healthcare, optical display, imaging, and military affairs. In this talk, I will introduce metasurface-enhanced holography, imaging, and biosensing technologies. First, I will show multifunctional metaholograms for interactive displays, optical security labels, and visual gas sensors. By integrating high-efficiency dielectric metaholograms with liquid crystal cell, we are able to actively control holographic images, which are reacting with external targeted stimuli. Furthermore, advanced metasurface design algorithm enables multiple information encoding in a single device like coloration and polarization states. Secondly, I will explain an electrically tunable varifocal metalens that operates at visible wavelengths and a point cloud generating metasurface for advanced 3D depth imaging or LiDAR applications. The electrically tunable varifocal metalens will enable solid-state zoom tuning camera. The point cloud generating metasurface is able to spread 10K dots over 2π full space with over 80% diffraction efficiency, which is promising for scanning-free LiDAR technology. Finally, I will show metasurface-driven molecular sensing technologies including multiplexed plasmon resonance energy transfer (PRET) hyperspectral imaging and ultrafast photonic PCR. Such multiplexed nanospectroscopy method can open up a new path for real-time molecular sensing and imaging methods. The perfect absorber-based metaphotonic PCR accelerates chip-based point-of-care testing applications.

Biography:

Inki Kim is an Assistant Professor in Department of Biophysics, Institute of Quantum Biophysics at Sungkyunkwan University (SKKU). He received his Ph.D degree (with Chang Kun Soo Memorial Award) in Mechanical Engineering at Pohang University of Science and Technology (POSTECH), and B.S. degree (with highest honor) in Mechanical Engineering at Ulsan National Institute of Science and Technology (UNIST). Prior to joining SKKU, he was a Sejong Science Fellow in Mechanical Engineering at POSTECH. He has published 50+ peer-reviewed articles in journals such as Nature Nanotechnology, Nature Communications, Science Advances, Advanced Materials, Materials Today, and Light: Science and Applications. Currently his research interests are experimental nanoscale photonics including metamaterials, metasurfaces, plasmonics, nanofabrications, bionanophotonics, quantum biophysics, and quantum-integrated medical devices.

Source: iCANX