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Optical Photon Number Resolving Detector by Parallel-Segmented Transition Edge Sensor with Single Bias Operation.

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Title: Optical Photon Number Resolving Detector by Parallel-Segmented Transition Edge Sensor with Single Bias Operation.
Authors: Mitsuya, Yuki1 (AUTHOR) ymitsuya@g.ecc.u-tokyo.ac.jp, Iijima, Masahiro2 (AUTHOR), Choghadi, Mohammad Amin1 (AUTHOR), Takahashi, Hiroyuki1 (AUTHOR)
Source: Journal of Low Temperature Physics. Feb2026, Vol. 222 Issue 1, p1-18. 18p.
Subjects: Photon detectors, Superconducting quantum interference devices, Computer simulation, Iridium
Abstract: We propose the parallel segmentation of the sensitive area of the optical transition edge sensor. The aim of parallel segmentation is to enhance the timing properties of the TES particularly in its rising edge by confining each heat diffusion event inside a segment and hence reducing the time required for the rise in resistance. All the segments are operated by a single voltage bias. We select iridium as its material and fabricated a two-segment device using photolithography and dry etching. The static characteristics were compared with a non-segmented device. We demonstrated the photon number resolving capability at the wavelength of 1547 nm and the parallel-segmented device exhibited an energy resolution of ΔE = 0.658 eV in FWHM using a SQUID readout. The electro-thermal simulations by finite difference method were performed to compare the timing properties among the different geometries including parallel-segmented structure. [ABSTRACT FROM AUTHOR]
Copyright of Journal of Low Temperature Physics is the property of Springer Nature and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)
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  Data: Optical Photon Number Resolving Detector by Parallel-Segmented Transition Edge Sensor with Single Bias Operation.
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  Data: <searchLink fieldCode="AR" term="%22Mitsuya%2C+Yuki%22">Mitsuya, Yuki</searchLink><relatesTo>1</relatesTo> (AUTHOR)<i> ymitsuya@g.ecc.u-tokyo.ac.jp</i><br /><searchLink fieldCode="AR" term="%22Iijima%2C+Masahiro%22">Iijima, Masahiro</searchLink><relatesTo>2</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Choghadi%2C+Mohammad+Amin%22">Choghadi, Mohammad Amin</searchLink><relatesTo>1</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Takahashi%2C+Hiroyuki%22">Takahashi, Hiroyuki</searchLink><relatesTo>1</relatesTo> (AUTHOR)
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  Data: <searchLink fieldCode="JN" term="%22Journal+of+Low+Temperature+Physics%22">Journal of Low Temperature Physics</searchLink>. Feb2026, Vol. 222 Issue 1, p1-18. 18p.
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  Data: <searchLink fieldCode="DE" term="%22Photon+detectors%22">Photon detectors</searchLink><br /><searchLink fieldCode="DE" term="%22Superconducting+quantum+interference+devices%22">Superconducting quantum interference devices</searchLink><br /><searchLink fieldCode="DE" term="%22Computer+simulation%22">Computer simulation</searchLink><br /><searchLink fieldCode="DE" term="%22Iridium%22">Iridium</searchLink>
– Name: Abstract
  Label: Abstract
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  Data: We propose the parallel segmentation of the sensitive area of the optical transition edge sensor. The aim of parallel segmentation is to enhance the timing properties of the TES particularly in its rising edge by confining each heat diffusion event inside a segment and hence reducing the time required for the rise in resistance. All the segments are operated by a single voltage bias. We select iridium as its material and fabricated a two-segment device using photolithography and dry etching. The static characteristics were compared with a non-segmented device. We demonstrated the photon number resolving capability at the wavelength of 1547 nm and the parallel-segmented device exhibited an energy resolution of ΔE = 0.658 eV in FWHM using a SQUID readout. The electro-thermal simulations by finite difference method were performed to compare the timing properties among the different geometries including parallel-segmented structure. [ABSTRACT FROM AUTHOR]
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  Label:
  Group: Ab
  Data: <i>Copyright of Journal of Low Temperature Physics is the property of Springer Nature and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract.</i> (Copyright applies to all Abstracts.)
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        Value: 10.1007/s10909-025-03342-y
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        Text: English
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      – SubjectFull: Photon detectors
        Type: general
      – SubjectFull: Superconducting quantum interference devices
        Type: general
      – SubjectFull: Computer simulation
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      – TitleFull: Optical Photon Number Resolving Detector by Parallel-Segmented Transition Edge Sensor with Single Bias Operation.
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              Text: Feb2026
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              Y: 2026
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