Original languageEnglish
JournalNature Photonics
Publication statusAcceptance date - 25 Jun 2024


Helpful comments from D. Bradshaw and K. Forbes are gratefully acknowledged. We are also grateful to L. Barron for the helpful discussion. The authors acknowledge support from Renishaw Plc (Wotton-under-Edge) and the Material and Chemical Characterisation Facility (MC 2 , University of Bath). The authors also thank P. Fletcher, J. Masters, D. Lednitzky, P. Paluch, J. Mills and A. Moore, Dept. of Physics, University of Bath, for their technical support and W. Liu in the Dept. of Chemistry, University of Bath, for his assistance with spin-coating.

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