Polarization-insensitive fiber-coupled superconducting-nanowire single photon detector using a high-index dielectric capping layer

Anna Mukhtarova; Luca Redaelli; Dibyendu Hazra; Houssaine Machhadani; Stéphane Lequien; Max Hofheinz; Jean Luc Thomassin; Frederic Gustavo; Julien Zichi; Val Zwiller; Eva Monroy; Jean Michel Gérard

doi:10.1364/OE.26.017697

Polarization-insensitive fiber-coupled superconducting-nanowire single photon detector using a high-index dielectric capping layer

Anna Mukhtarova, Luca Redaelli, Dibyendu Hazra, Houssaine Machhadani, Stéphane Lequien, Max Hofheinz, Jean Luc Thomassin, Frederic Gustavo, Julien Zichi, Val Zwiller, Eva Monroy^*, Jean Michel Gérard

^*Corresponding author for this work

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

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Abstract

Superconducting-nanowire single photon detectors (SNSPDs) are able to reach near-unity detection efficiency in the infrared spectral range. However, due to the intrinsic asymmetry of nanowires, SNSPDs are usually very sensitive to the polarization of the incident radiation, their responsivity being maximum for light polarized parallel to the nanowire length (transverse-electric (TE) polarization). Here, we report on the reduction of the polarization sensitivity obtained by capping NbN-based SNSPDs with a high-index SiNx dielectric layer, which reduces the permittivity mismatch between the NbN wire and the surrounding area. Experimentally, a polarization sensitivity below 0.1 is obtained both at 1.31 and 1.55 µm, in excellent agreement with simulations.

Original language	English
Pages (from-to)	17697-17703
Journal	Optics Express
Volume	26
Issue number	13
DOIs	https://doi.org/10.1364/OE.26.017697
Publication status	Published - 2018

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Mukhtarova, A., Redaelli, L., Hazra, D., Machhadani, H., Lequien, S., Hofheinz, M., Thomassin, J. L., Gustavo, F., Zichi, J., Zwiller, V., Monroy, E., & Gérard, J. M. (2018). Polarization-insensitive fiber-coupled superconducting-nanowire single photon detector using a high-index dielectric capping layer. Optics Express, 26(13), 17697-17703. https://doi.org/10.1364/OE.26.017697

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title = "Polarization-insensitive fiber-coupled superconducting-nanowire single photon detector using a high-index dielectric capping layer",

abstract = "Superconducting-nanowire single photon detectors (SNSPDs) are able to reach near-unity detection efficiency in the infrared spectral range. However, due to the intrinsic asymmetry of nanowires, SNSPDs are usually very sensitive to the polarization of the incident radiation, their responsivity being maximum for light polarized parallel to the nanowire length (transverse-electric (TE) polarization). Here, we report on the reduction of the polarization sensitivity obtained by capping NbN-based SNSPDs with a high-index SiNx dielectric layer, which reduces the permittivity mismatch between the NbN wire and the surrounding area. Experimentally, a polarization sensitivity below 0.1 is obtained both at 1.31 and 1.55 µm, in excellent agreement with simulations.",

author = "Anna Mukhtarova and Luca Redaelli and Dibyendu Hazra and Houssaine Machhadani and St{\'e}phane Lequien and Max Hofheinz and Thomassin, {Jean Luc} and Frederic Gustavo and Julien Zichi and Val Zwiller and Eva Monroy and G{\'e}rard, {Jean Michel}",

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Mukhtarova, A, Redaelli, L, Hazra, D, Machhadani, H, Lequien, S, Hofheinz, M, Thomassin, JL, Gustavo, F, Zichi, J, Zwiller, V, Monroy, E & Gérard, JM 2018, 'Polarization-insensitive fiber-coupled superconducting-nanowire single photon detector using a high-index dielectric capping layer', Optics Express, vol. 26, no. 13, pp. 17697-17703. https://doi.org/10.1364/OE.26.017697

TY - JOUR

T1 - Polarization-insensitive fiber-coupled superconducting-nanowire single photon detector using a high-index dielectric capping layer

AU - Mukhtarova, Anna

AU - Redaelli, Luca

AU - Hazra, Dibyendu

AU - Machhadani, Houssaine

AU - Lequien, Stéphane

AU - Hofheinz, Max

AU - Thomassin, Jean Luc

AU - Gustavo, Frederic

AU - Zichi, Julien

AU - Zwiller, Val

AU - Monroy, Eva

AU - Gérard, Jean Michel

N1 - Accepted Author Manuscript

PY - 2018

Y1 - 2018

N2 - Superconducting-nanowire single photon detectors (SNSPDs) are able to reach near-unity detection efficiency in the infrared spectral range. However, due to the intrinsic asymmetry of nanowires, SNSPDs are usually very sensitive to the polarization of the incident radiation, their responsivity being maximum for light polarized parallel to the nanowire length (transverse-electric (TE) polarization). Here, we report on the reduction of the polarization sensitivity obtained by capping NbN-based SNSPDs with a high-index SiNx dielectric layer, which reduces the permittivity mismatch between the NbN wire and the surrounding area. Experimentally, a polarization sensitivity below 0.1 is obtained both at 1.31 and 1.55 µm, in excellent agreement with simulations.

AB - Superconducting-nanowire single photon detectors (SNSPDs) are able to reach near-unity detection efficiency in the infrared spectral range. However, due to the intrinsic asymmetry of nanowires, SNSPDs are usually very sensitive to the polarization of the incident radiation, their responsivity being maximum for light polarized parallel to the nanowire length (transverse-electric (TE) polarization). Here, we report on the reduction of the polarization sensitivity obtained by capping NbN-based SNSPDs with a high-index SiNx dielectric layer, which reduces the permittivity mismatch between the NbN wire and the surrounding area. Experimentally, a polarization sensitivity below 0.1 is obtained both at 1.31 and 1.55 µm, in excellent agreement with simulations.

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JO - Optics Express

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Polarization-insensitive fiber-coupled superconducting-nanowire single photon detector using a high-index dielectric capping layer

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