Nanophotonics with Layered Semiconductor
Electrons in two-dimensional layered semiconductors like MoS2 possess additional degrees of freedom compared to conventional semiconductors. Apart from charge and spin, they can be assigned valley (direction) and layer indexes. The opens up many opportunities for the observation of novel physical phenomena and constitutes a new resource for the design of optoelectronic devices for information processing.
The interplay between spin, valley and layer numbers in few-layer van der Waals semiconductors gives rise to very rich exciton Physics. Our team investigates the optical properties of these fascinating materials through a combination of low-temperature photoluminescence, optical polarization, magneto-photoluminescence, and photocurrent techniques.
An overarching goal of our research is a better understanding and exploitation of optical chirality at the nanoscale: its physical origin, its enhancement and manipulation, and possible chiral nanophotonic devices. A major focus of our research is thus the demonstration of novel nano-optical effects governed by specific spin and valley Physics.
Our most recent peer reviewed publications
High-Frequency Sheet Conductance of Nanolayered WS2Crystals for Two-Dimensional NanodevicesACS Applied Nano Materials (2022)
Exciton Diffusion and Annihilation in Nanophotonic Purcell LandscapesAdvanced Optical Materials (2022)
Fabrication of plasmonic structures with well-controlled nanometric featuresNanotechnology (2021)
THz microscopy on a single WS2 microcrystal(2021)
Dual Nanoresonators for Ultrasensitive Chiral DetectionACS Photonics (2021)