Local tuning of Rydberg exciton energies in nanofabricated Cu2O pillars

Anindya Sundar Paul; Sai Kiran Rajendran; D Ziemkiewicz; T Volz; Hamid Ohadi

doi:10.1038/s43246-024-00481-9

Local tuning of Rydberg exciton energies in nanofabricated Cu₂O pillars

Anindya Sundar Paul, Sai Kiran Rajendran^*, D Ziemkiewicz, T Volz, Hamid Ohadi^*

^*Corresponding author for this work

Research output: Contribution to journal › Article › peer-review

Abstract

Rydberg excitons in Cu₂O feature giant optical nonlinearities. To exploit these nonlinearities for quantum applications, the confinement must match the Rydberg blockade size, which in Cu₂O could be as large as a few microns. Here, in a top-down approach, we show how exciton confinement can be realised by focused-ion-beam etching of a polished bulk Cu₂O crystal without noticeable degradation of the excitonic properties. The etching of the crystal to micron sizes allows for tuning the energies of Rydberg excitons locally, and precisely, by optically induced temperature change. These results pave the way for exploiting the large nonlinearities of Rydberg excitons in micropillars for making non-classical light sources, while the precise tuning of their emission energy opens up a viable pathway for realizing a scalable photonic quantum simulation platform.

Original language	English
Article number	43
Number of pages	8
Journal	Communications Materials
Volume	5
Issue number	43
DOIs	https://doi.org/10.1038/s43246-024-00481-9 https://doi.org/10.1038/s43246-024-00481-9
Publication status	Published - 28 Mar 2024

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1 Active
4 Finished

Perovskite dipolaritons for room tempera: Perovskite Dipolaritons for Room Temperature Quantum Applications
Ohadi, H. (PI)
The Leverhulme Trust
2/01/23 → 1/01/26
Project: Standard
Tailored Rydberg Superatoms: Tailored Rydberg Superatoms through Quantum Confinement
Rajendran, S. K. (PI)
Carnegie Trust
1/10/20 → 30/03/21
Project: Standard
Rydberg polaritons in Cu2O microcavities: Rydberg polaritons in Cu2O microcavities
Ohadi, H. (PI)
EPSRC
15/01/19 → 14/01/21
Project: Standard

Observation of Rydberg excitons in nanofabricated Cu2O crystals and cavities (thesis data)
Paul, A. S. (Creator), Ohadi, H. (Supervisor), Volz, T. (Supervisor), Rajendran, S. K. (Contributor) & Vallabhapurapu, H. (Contributor), University of St Andrews, 17 Mar 2025
DOI: 10.17630/6ef54e98-c0aa-453d-9a32-9ed0d25031b3
Dataset: Thesis dataset
Local tuning of Rydberg exciton energies in nanofabricated Cu2O pillars (dataset)
Paul, A. S. (Creator), Rajendran, S. K. (Contributor), Ziemkiewicz, D. (Contributor), Volz, T. (Supervisor) & Ohadi, H. (Supervisor), University of St Andrews, 29 Mar 2024
DOI: 10.17630/bdc0fa20-1218-4094-9306-3fd372a792d9
Dataset

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1 Article

Local tuning of Rydberg exciton energies in nanofabricated Cu₂O pillars
Paul, A. S., Rajendran, S. K., Ziemkiewicz, D., Volz, T. & Ohadi, H., 28 Mar 2024, In: Communications Materials. 5, 43, 8 p., 43.
Research output: Contribution to journal › Article › peer-review

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title = "Local tuning of Rydberg exciton energies in nanofabricated Cu2O pillars",

abstract = "Rydberg excitons in Cu2O feature giant optical nonlinearities. To exploit these nonlinearities for quantum applications, the confinement must match the Rydberg blockade size, which in Cu2O could be as large as a few microns. Here, in a top-down approach, we show how exciton confinement can be realised by focused-ion-beam etching of a polished bulk Cu2O crystal without noticeable degradation of the excitonic properties. The etching of the crystal to micron sizes allows for tuning the energies of Rydberg excitons locally, and precisely, by optically induced temperature change. These results pave the way for exploiting the large nonlinearities of Rydberg excitons in micropillars for making non-classical light sources, while the precise tuning of their emission energy opens up a viable pathway for realizing a scalable photonic quantum simulation platform.",

author = "Paul, {Anindya Sundar} and Rajendran, {Sai Kiran} and D Ziemkiewicz and T Volz and Hamid Ohadi",

note = "Funding: This work was supported by the EPSRC through grant No. EP/S014403/1, by The Royal Society through RGS\R2\192174, and by the Leverhulme Trust through grant No. RPG-2022-188. A.S.P. acknowledges the PhD scholarship from University of St Andrews and Macquarie University and the support of Sydney Quantum Academy, Sydney, NSW, Australia for The SQA Supplementary Scholarship. S.K.R. acknowledges the Carnegie Trust for the Universities of Scotland Research Incentive Grant RIG009823. T.V. acknowledges support through the ARC Centre of Excellence for Engineered Quantum Systems (CE170100009). The authors acknowledge the support of EPSRC Capital for Great Technologies Grant EP/L017008/1 and the EPSRC Strategic Equipment Resource Grant EP/R023751/1 for the use of the FIB equipment for the fabrication of the pillars.",

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AU - Ohadi, Hamid

N1 - Funding: This work was supported by the EPSRC through grant No. EP/S014403/1, by The Royal Society through RGS\R2\192174, and by the Leverhulme Trust through grant No. RPG-2022-188. A.S.P. acknowledges the PhD scholarship from University of St Andrews and Macquarie University and the support of Sydney Quantum Academy, Sydney, NSW, Australia for The SQA Supplementary Scholarship. S.K.R. acknowledges the Carnegie Trust for the Universities of Scotland Research Incentive Grant RIG009823. T.V. acknowledges support through the ARC Centre of Excellence for Engineered Quantum Systems (CE170100009). The authors acknowledge the support of EPSRC Capital for Great Technologies Grant EP/L017008/1 and the EPSRC Strategic Equipment Resource Grant EP/R023751/1 for the use of the FIB equipment for the fabrication of the pillars.

PY - 2024/3/28

Y1 - 2024/3/28

N2 - Rydberg excitons in Cu2O feature giant optical nonlinearities. To exploit these nonlinearities for quantum applications, the confinement must match the Rydberg blockade size, which in Cu2O could be as large as a few microns. Here, in a top-down approach, we show how exciton confinement can be realised by focused-ion-beam etching of a polished bulk Cu2O crystal without noticeable degradation of the excitonic properties. The etching of the crystal to micron sizes allows for tuning the energies of Rydberg excitons locally, and precisely, by optically induced temperature change. These results pave the way for exploiting the large nonlinearities of Rydberg excitons in micropillars for making non-classical light sources, while the precise tuning of their emission energy opens up a viable pathway for realizing a scalable photonic quantum simulation platform.

AB - Rydberg excitons in Cu2O feature giant optical nonlinearities. To exploit these nonlinearities for quantum applications, the confinement must match the Rydberg blockade size, which in Cu2O could be as large as a few microns. Here, in a top-down approach, we show how exciton confinement can be realised by focused-ion-beam etching of a polished bulk Cu2O crystal without noticeable degradation of the excitonic properties. The etching of the crystal to micron sizes allows for tuning the energies of Rydberg excitons locally, and precisely, by optically induced temperature change. These results pave the way for exploiting the large nonlinearities of Rydberg excitons in micropillars for making non-classical light sources, while the precise tuning of their emission energy opens up a viable pathway for realizing a scalable photonic quantum simulation platform.

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JO - Communications Materials

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ER -

Local tuning of Rydberg exciton energies in nanofabricated Cu2O pillars

Abstract

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Projects

Perovskite dipolaritons for room tempera: Perovskite Dipolaritons for Room Temperature Quantum Applications

Tailored Rydberg Superatoms: Tailored Rydberg Superatoms through Quantum Confinement

Rydberg polaritons in Cu2O microcavities: Rydberg polaritons in Cu2O microcavities

Datasets

Observation of Rydberg excitons in nanofabricated Cu2O crystals and cavities (thesis data)