Imperial College London
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Professor Matthew J. Fuchter

Faculty of Natural Sciences, Department of Chemistry

Professor of Chemistry
 
 
 
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Contact

 

+44 (0)20 7594 5815m.fuchter

 
 
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Location

 

110DMolecular Sciences Research HubWhite City Campus

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Summary

 

Publications

Citation

BibTex format

@article{Wan:2023:10.1038/s41566-022-01113-9,
author = {Wan, L and Yizhou, L and Fuchter, M and Yan, B},
doi = {10.1038/s41566-022-01113-9},
journal = {Nature Photonics},
pages = {193--199},
title = {Anomalous circularly polarized light emission in organic light-emitting diodes caused by orbital-momentum locking},
url = {http://dx.doi.org/10.1038/s41566-022-01113-9},
volume = {17},
year = {2023}
}
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RIS format (EndNote, RefMan)

TY  - JOUR
AB  - Chiral circularly polarized (CP) light is central to many photonic technologies, from optical communication of spin information to novel display and imaging technologies. As such, there has been significant effort in the development of chiral emissive materials that allow for the emission of strongly dissymmetric CP light from organic light-emitting diodes (OLEDs). A consensus for chiral emission in such devices is that the molecular chirality of the active layer determines the favored light handedness of CP emission, regardless of the light-emitting direction. Here, we discover that, unconventionally, oppositely propagating CP light exhibits opposite handedness and reversing the current-flow in OLEDs also switches the handedness of the emitted CP light. This direction-dependent CP emission boosts the net polarization rate by orders of magnitude by resolving an established issue in CP-OLEDs, where the CP light reflected by the back electrode typically erodes the measured dissymmetry. Through detailed theoretical analysis, we assign this anomalous CP emission to a ubiquitous topological electronic property in chiral materials, namely the orbital-momentum locking. Our work paves the way to design new  chiroptoelectronic devices and probes the close connections between chiral materials, topological electrons, and CP light in the quantum regime.
AU  - Wan,L
AU  - Yizhou,L
AU  - Fuchter,M
AU  - Yan,B
DO  - 10.1038/s41566-022-01113-9
EP  - 199
PY  - 2023///
SN  - 1749-4885
SP  - 193
TI  - Anomalous circularly polarized light emission in organic light-emitting diodes caused by orbital-momentum locking
T2  - Nature Photonics
UR  - http://dx.doi.org/10.1038/s41566-022-01113-9
UR  - http://hdl.handle.net/10044/1/100169
VL  - 17
ER  -
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