A5036202105- Topological Materials and Phenomena
- Photonic Crystals and Applications
- Graphene research and applications
- 2D Materials and Applications
- Metamaterials and Metasurfaces Applications
- Diamond and Carbon-based Materials Research
- Plasmonic and Surface Plasmon Research
- Electronic and Structural Properties of Oxides
- Quantum and electron transport phenomena
- Semiconductor Lasers and Optical Devices
- Photonic and Optical Devices
Nanyang Technological University
2018-2022
University of Jinan
2022
Quantum anomalous valley Hall effect (QAVHE), which combines both the features of QAHE and AVHE, is fundamentally intriguing practically appealing, but experimentally challenging to realize in two-dimensional (2D) intrinsic magnetic materials date. Here, based on first-principles calculations with density functional theory $+U$ approach, we predicted electronic correlation-driven valley-dependent quantum phase transition from ferrovalley (FV) half-valley-semiconductor (HVS) QAVHE HVS FV...
On-chip optical communications are in increasingly demand for low-loss, small-footprint and power-efficient waveguiding solutions the telecom band. However, most integrated circuits suffer from high propagation loss low integration degree. Through manipulating valley-dependent topological phase of light, we have experimentally demonstrated both robust transport electrical modulation lightwaves at wavelengths valley photonic crystals. With adoption kink states, 25 Gbit/s signal 1550 nm is...
The quantum anomalous Hall effect (QAHE) has special properties that are ideal for possible future spintronic devices. However, the experimental realization is rather challenging due to its low Curie temperature and small non-trivial bandgap in two-dimensional (2D) materials. In this paper, we demonstrate through first-principles calculations monolayer Co 2 Te material a promising 2D candidate realize QAHE practice. Excitingly, Monte Carlo simulations, it found of single-layer can reach 573...
Photonic-integrated circuits (PICs) are a key enabler for the ultimate miniaturization of next-generation optical computers that can fit in palm your hand. However, realization fully functional PICs is currently limited by absence an efficient light source on silicon (Si), thus making practical Si-compatible Holy Grail. Especially, it has been far considered close to impossible create on-chip laser using group IV semiconductor materials (e.g. germanium (Ge)) owing their indirect bandgap...
Pseudo-magnetic field in strained graphene has emerged as a promising route to allow observing intriguing physical phenomena that would be inaccessible with laboratory superconducting magnets. However, experimental observation of the impact pseudo-magnetic on optical and electrical properties remained unknown. Here, using time-resolved infrared pump-probe spectroscopy, we provide unambiguous evidence slow carrier dynamics enabled by giant (~100 T) periodically graphene. Our finding presents...
The potential for establishing energy gaps by pseudo-magnetic fields in strain-engineered graphene has sparked much interest recently. However, the limited sizes of induced and complicated platforms straining have thus far prevented researchers from harnessing unique optoelectronic devices. In this work, we present an experimental demonstration triaxially strained suspended structures capable obtaining quasi-uniform over a large scale. novel metal electrode design functions as both stressors...