Conversion of twisted light to twisted excitons using carbon nanotubes

Xiaoning Zang; Nirpendra Singh; Mark T. Lusk; Udo Schwingenschlögl

doi:10.1038/s41524-022-00726-6

Conversion of twisted light to twisted excitons using carbon nanotubes

Xiaoning Zang, Nirpendra Singh, Mark T. Lusk, Udo Schwingenschlögl

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Abstract

Carbon nanotubes are explored as a means of coherently converting the orbital angular momentum of light to an excitonic form that is more amenable to quantum information processing. An analytical analysis, based on dynamical conductivity, is used to show that orbital angular momentum is conserved, modulo $\textit{N}$, for a carbon nanotube illuminated by radially polarized, twisted light. This result is numerically demonstrated using real-time time-dependent density functional theory which captures the absorption of twisted light and the subsequent transfer of twisted excitons. The results suggest that carbon nanotubes are promising candidates for constructing optoelectronic circuits in which quantum information is more readily processed while manifested in excitonic form.

Original language	English (US)
Journal	npj Computational Materials
Volume	8
Issue number	1
DOIs	https://doi.org/10.1038/s41524-022-00726-6
State	Published - Mar 17 2022

Bibliographical note

KAUST Repository Item: Exported on 2022-04-06
Acknowledgements: The research reported in this publication was supported by funding from King Abdullah University of Science and Technology (KAUST). For computer time, this research used the resources of the Supercomputing Laboratory at KAUST.

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10.1038/s41524-022-00726-6

https://repository.kaust.edu.sa/bitstream/10754/676125/1/s41524-022-00726-6.pdf

Cite this

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title = "Conversion of twisted light to twisted excitons using carbon nanotubes",

abstract = "Carbon nanotubes are explored as a means of coherently converting the orbital angular momentum of light to an excitonic form that is more amenable to quantum information processing. An analytical analysis, based on dynamical conductivity, is used to show that orbital angular momentum is conserved, modulo $\textit{N}$, for a carbon nanotube illuminated by radially polarized, twisted light. This result is numerically demonstrated using real-time time-dependent density functional theory which captures the absorption of twisted light and the subsequent transfer of twisted excitons. The results suggest that carbon nanotubes are promising candidates for constructing optoelectronic circuits in which quantum information is more readily processed while manifested in excitonic form.",

author = "Xiaoning Zang and Nirpendra Singh and Lusk, {Mark T.} and Udo Schwingenschl{\"o}gl",

note = "KAUST Repository Item: Exported on 2022-04-06 Acknowledgements: The research reported in this publication was supported by funding from King Abdullah University of Science and Technology (KAUST). For computer time, this research used the resources of the Supercomputing Laboratory at KAUST.",

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doi = "10.1038/s41524-022-00726-6",

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T1 - Conversion of twisted light to twisted excitons using carbon nanotubes

AU - Zang, Xiaoning

AU - Singh, Nirpendra

AU - Lusk, Mark T.

AU - Schwingenschlögl, Udo

N1 - KAUST Repository Item: Exported on 2022-04-06 Acknowledgements: The research reported in this publication was supported by funding from King Abdullah University of Science and Technology (KAUST). For computer time, this research used the resources of the Supercomputing Laboratory at KAUST.

PY - 2022/3/17

Y1 - 2022/3/17

N2 - Carbon nanotubes are explored as a means of coherently converting the orbital angular momentum of light to an excitonic form that is more amenable to quantum information processing. An analytical analysis, based on dynamical conductivity, is used to show that orbital angular momentum is conserved, modulo $\textit{N}$, for a carbon nanotube illuminated by radially polarized, twisted light. This result is numerically demonstrated using real-time time-dependent density functional theory which captures the absorption of twisted light and the subsequent transfer of twisted excitons. The results suggest that carbon nanotubes are promising candidates for constructing optoelectronic circuits in which quantum information is more readily processed while manifested in excitonic form.

AB - Carbon nanotubes are explored as a means of coherently converting the orbital angular momentum of light to an excitonic form that is more amenable to quantum information processing. An analytical analysis, based on dynamical conductivity, is used to show that orbital angular momentum is conserved, modulo $\textit{N}$, for a carbon nanotube illuminated by radially polarized, twisted light. This result is numerically demonstrated using real-time time-dependent density functional theory which captures the absorption of twisted light and the subsequent transfer of twisted excitons. The results suggest that carbon nanotubes are promising candidates for constructing optoelectronic circuits in which quantum information is more readily processed while manifested in excitonic form.

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Conversion of twisted light to twisted excitons using carbon nanotubes

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