Title: Light manipulation using multilayered transition metal dichalcogenides
Abstract: Transition metal dichalcogenides (TMDs) have emerged as a promising platform for photonic applications due to their strong light-exciton interactions. However, while TMD monolayers have been extensively studied, multilayered TMDs have received less attention due to their transition to an indirect bandgap. In this seminar, I will discuss the recent research advancements made by my group in the study of multilayered TMDs. We have found that bare TMD layers can naturally support guided exciton polaritons, owing to their strong excitonic resonances. This strong exciton-photon coupling offers high tunability and nonlinearity of the guided modes, making these materials particularly advantageous for nanophotonic applications. I will show several recent examples of nanophotonic applications that demonstrate the untapped potential of TMD layers in exploring new phenomena and applications in nanophotonics.
Biography: Su-Hyun Gong is an associate professor in the department of Physics at Korea University. She received her PhD from the department of Physics at KAIST in 2015. Following her doctoral studies, she served as a postdoctoral fellow in Kobus Kuipers' group at AMOLF and TU Delft in the Netherlands. She joined Korea University in 2018. Her current research interest is nanophotonics using 2D semiconductor, especially valley-photon coupling in both weak and strong coupling regimes. She recently has focused on study with guided exciton polariton in a bare transmission metal dichalcogenides multilayers.
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