Description
The capability to switch or modulate the light output from nanoscale structures is essential for the development of nano-sensing technology and high-density photonic computing. In their bulk form, metal halide perovskites have shown promise for optoelectronic applications including solar cells, photodetectors, and ionizing-radiation detectors. In low-dimensional perovskites, the additional presence of stable excitons at room temperature provides an ideal medium for light-emitting devices and a testbed for exciton physics. In this presentation, we demonstrate how magneto-photoluminescence (MPL) spectroscopy can be used to reveal both intrinsic and extrinsic influences on the energy and spin structure of exciton states in 2D perovskites, which ultimately dictate light emission. We show how a 15× enhancement in MPL can be achieved in colloidal 2D perovskite nanosheets at room temperature, which is highly sensitive to the chemical environment. Finally, we design a hybrid plasmonic perovskite nanolaser structure which exhibits unique sensitivity to optical input polarisation. This research advances fundamental knowledge of perovskite optoelectronic materials and paves the way for nanoscale applications including optical sensing, magnetometry, and photonic computing.
| I am the presenting author | Yes |
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