XXIX Symposium "Nanophysics and Nanoelectronics" in Nizhny Novgorod, March 10-14, 2025
Solids

Characteristics of a superconducting single-photon detector shielded by ITO under external electric field conditions

K. O. Sedykh^ab, E. Suleimen^cd, M. I. Svyatodukh^ac, S. Yu. Zarutskiy^d, A. S. Podlesnyy^d, A. D. Golikov^bc, I. N. Florya^b, V. V. Kovalyuk^ab, K. E. Lakhmanskii^d, G. N. Gol'tsman<sup>ad

a</sup> National Research University Higher School of Economics, Moscow
^b National University of Science and Technology «MISIS», Moscow
^c Moscow State Region University
^d Russian Quantum Center, Skolkovo, Moscow

Abstract: In this work, a model of a surface ion trap with radio-frequency (RF) electrodes and a superconducting single-photon detector made of niobium nitride shielded by indium-tin oxide (ITO) at a temperature of 2.2 K was investigated. The amplitude of the radio-frequency signal supplied to the electrodes varied within 0.01 – 2 V at frequencies of 5 – 35 MHz. The results of the dependence of the dark count rate and detection efficiency of the single-photon detector on the induced external RF field with a shielded ITO coating are presented.

Keywords: surface ion trap, superconducting single-photon detector, niobium nitride (NbN), shielding, indium tin oxide (ITO), scalable ion quantum computer.

Received: 04.05.2025
Revised: 04.05.2025
Accepted: 04.05.2025

DOI: 10.61011/JTF.2025.09.61227.80-25

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