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Design of scalable metalens array for optical addressing.
Tie Hu1, Xing Feng1, Zhenyu Yang1
1School of Optical and Electronic Information, Huazhong University of Science and Technology, Wuhan, 430074, China.
Frontiers of Optoelectronics
|January 13, 2023
Summary
We developed a scalable metalens array for optical addressing in trapped-ion quantum computers. This innovation addresses scalability challenges posed by traditional optical elements, paving the way for more powerful quantum systems.
Area of Science:
- Quantum Computing
- Nanophotonics
- Optical Engineering
Background:
- Trapped-ion quantum computers offer significant advantages over classical systems for various applications.
- Scalability is a major hurdle for trapped-ion quantum computers, primarily due to complex optical addressing systems.
- Metasurfaces present a flexible and integrable solution for improving optical components.
Purpose of the Study:
- To propose and numerically demonstrate a scalable off-axis metalens array for optical addressing.
- To overcome the limitations of conventional optical elements in trapped-ion quantum computing.
Main Methods:
- Design and numerical simulation of an off-axis metalens array.
- Operation at a wavelength of 350 nm.
- Design for both x-linearly polarized and left circularly polarized light.
Main Results:
- The metalens array successfully focuses a collimated addressing beam array into a compact spot array.
- Achieved a spot spacing of 5 μm.
- Demonstrated crosstalk below 0.82% for both polarization types.
Conclusions:
- The proposed metalens array offers a scalable solution for optical addressing in trapped-ion quantum computers.
- Metasurfaces provide a viable path to enhance the integration and performance of quantum computing hardware.
- This advancement is crucial for realizing the potential of quantum computation in fields like finance and pharmaceuticals.
