Building novel photonics with 2D materials - Goki Eda

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Building novel photonics with 2D materials
Professor Goki Eda
National University of Singapore

ABSTRACT:

Modern electronic and photonic technologies are enabled by ingeniously designed artificial heterostructures that allow electrical and optical signals to be manipulated. The advent of graphene and other two-dimensional (2D) materials, and the development of their atomically precise van der Waals heterostructures, opened up exciting prospects for realizing device functions that are otherwise impossible with conventional materials. Strongly excitonic 2D semiconductors such as monolayer MoS2 and WSe2 are attractive for their rich many-body physics and the ease of photonic device integration. At Eda Lab, we explore and exploit the optoelectronic behaviors of excitons and their complexes through device and materials engineering. This talk will focus on our approaches to realizing electrical generation, manipulation, and detection of excitons based on various heterostructure schemes. I will discuss how hexagonal boron nitride tunnel barrier allow electrically tunable excitonic electroluminescence and electro-optic upconversion effects. We demonstrate that ultrafast interlayer charge and energy transfer dynamics is key to understanding heterostructure optoelectronics. For closing remarks, I will highlight open questions and discuss the prospects of 2D semiconductors for quantum photonics.
BIOGRAPHY:

Dr. Eda received his M.Sc. in Materials Science and Engineering from Worcester Polytechnic Institute in 2006 and Ph.D. in the same discipline from Rutgers University in 2009. He became a Newton International Fellow of the Royal Society of the UK and worked at Imperial College London. He joined the National University of Singapore as an Assistant Professor of Physics and Chemistry, and a member of the Centre for Advanced 2D Materials (CA2DM) in 2011. He is a recipient of the Singapore National Research Foundation (NRF) Research Fellowship and many awards including the Singapore National Academy of Science (SNAS) Young Scientist Award, University Young Researcher Award, and IPS Omicron Nanotechnology Award. He is an Associate Editor of npj 2D Materials and Applications. Dr. Eda investigates a wide range of physical and chemical properties of two-dimensional materials with a focus on their photonic device applications.

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