Sol-gel deposited RuO2 film on lead-bismuth-silicate glass for cryogenic quantum computing

Hua Cai; Hui Liu; Liying Wei; Shuaiqi Li; Jing Ma; Huichao Xu; Jiao Lian; Wenjing Qin; Tingqiao Zhao; Tiezhu Bo; Shiyong Xie; Chang Liu; Caili Wang

doi:10.1117/12.2665765

4 April 2023 Sol-gel deposited RuO₂ film on lead-bismuth-silicate glass for cryogenic quantum computing

Hua Cai, Hui Liu, Liying Wei, Shuaiqi Li, Jing Ma, Huichao Xu, Jiao Lian, Wenjing Qin, Tingqiao Zhao, Tiezhu Bo, Shiyong Xie, Chang Liu, Caili Wang

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Proceedings Volume 12617, Ninth Symposium on Novel Photoelectronic Detection Technology and Applications; 1261735 (2023) https://doi.org/10.1117/12.2665765
Event: 9th Symposium on Novel Photoelectronic Detection Technology and Applications (NDTA 2022), 2022, Hefei, China

Abstract

Microchannel plate (MCP) is an important potential readout device for cryogenic quantum computing, especially for the quantum computation based on floating electrons of liquid helium surface. The signal readout time is a primary property of quantum computing, which is grounded in and proportional to the bulk resistance of the MCP multiplier. Notwithstanding, the bulk resistance of the MCP multiplier became giant at cryogenic temperature for the property of huge negative temperature coefficient of resistance, almost 10⁵ Gohm at 20K~30K, resulting in a readout time of 10^-2-1s at cryogenic temperature. That was one of the major bottlenecks for the cryogenic quantum computing application of MCPs. In this paper, ruthenium oxide films were sol-gel deposited onto the lead-bismuth-silicate glass, one kind of the base material for MCPs, produced by the Research and Development Center of Microchannel Plate, China Building Materials Academy. Surface topographic properties of the film were investigated with a laser scanning confocal microscope (LSCM). The hybrid bulk-resistance of RuO₂ film deposited glass was measured in a modified Vacuum Photoelectron Imaging Test Facility (VPIT). It indicated that the sol-gel deposited RuO₂ film could decrease the bulk resistance of hydrogen-reduced lead-bismuth-silicate glass and effectively mitigate its giant thermal resistance. This research can give a significant reference for developing MCP detectors in cryogenic quantum computing applications.

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Hua Cai, Hui Liu, Liying Wei, Shuaiqi Li, Jing Ma, Huichao Xu, Jiao Lian, Wenjing Qin, Tingqiao Zhao, Tiezhu Bo, Shiyong Xie, Chang Liu, and Caili Wang "Sol-gel deposited RuO₂ film on lead-bismuth-silicate glass for cryogenic quantum computing", Proc. SPIE 12617, Ninth Symposium on Novel Photoelectronic Detection Technology and Applications, 1261735 (4 April 2023); https://doi.org/10.1117/12.2665765

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KEYWORDS

Resistance

Glasses

Microchannel plates

Cryogenics

Semiconducting wafers

Quantum computing

Sol-gels

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