A Dual Band Focal Plane Array of Kinetic Inductance Bolometers Based on Frequency Selective Absorbers

Shahab Dabironezare, Juha Hassel, Erio Gandini, Leif Gronberg, Hannu Sipola, Visa Vesterinen, Nuria Llombart

Research output: Contribution to journalArticleResearchpeer-review

Abstract

Passive imaging cameras at sub-millimeter wavelengths with large format focal plane arrays are being developed as the next generation of security screening systems. In this contribution, a dual-band focal plane array (FPA) for security imagers at submillimeter wave frequencies is presented. The detectors are based on bolometric superconducting kinetic inductance resonators, which allows the development of large FPAs at medium cooled temperatures. Two frequency selective absorber (FSA) sets coupled to superconductive resonator lines are designed to implement a dual color security imager. The performance of the dual band imager is evaluated using spectral analysis approach that combines Fourier optics with a Floquet mode field representation. The geometry of the unit cells is based on a Jerusalem cross configuration and the designed FSAs show a stable angular response and a rejection 1 to 3 of the undesired bandwidth. The detectors in the dual band FPA are distributed over a hexagonal grid to maximize their physical size and then improve their sensitivity. The effective point spread function of the imager coupled to a black body point source over a wide frequency band (1:6) was demonstrated experimentally with excellent agreement to the one estimated by using the proposed spectral technique.

LanguageEnglish
JournalIEEE Transactions on Terahertz Science and Technology
DOIs
Publication statusAccepted/In press - 1 Jan 2018
MoE publication typeNot Eligible

Fingerprint

Bolometers
Focal plane arrays
bolometers
focal plane devices
Image sensors
inductance
Inductance
absorbers
Kinetics
kinetics
resonators
Resonators
submillimeter waves
Fourier optics
detectors
point spread functions
Detectors
Submillimeter waves
rejection
point sources

Keywords

  • Detectors
  • Dual band
  • focal plane array
  • frequency selective absorber
  • Geometry
  • incoherent source
  • Inductance
  • Kinetic theory
  • Resonators
  • Security
  • Sub-mm wavelengths

OKM Publication Types

  • A1 Refereed journal article

OKM Open Access Status

  • 0 Not Open Access

ASJC Scopus subject areas

  • Radiation
  • Electrical and Electronic Engineering

Cite this

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title = "A Dual Band Focal Plane Array of Kinetic Inductance Bolometers Based on Frequency Selective Absorbers",
abstract = "Passive imaging cameras at sub-millimeter wavelengths with large format focal plane arrays are being developed as the next generation of security screening systems. In this contribution, a dual-band focal plane array (FPA) for security imagers at submillimeter wave frequencies is presented. The detectors are based on bolometric superconducting kinetic inductance resonators, which allows the development of large FPAs at medium cooled temperatures. Two frequency selective absorber (FSA) sets coupled to superconductive resonator lines are designed to implement a dual color security imager. The performance of the dual band imager is evaluated using spectral analysis approach that combines Fourier optics with a Floquet mode field representation. The geometry of the unit cells is based on a Jerusalem cross configuration and the designed FSAs show a stable angular response and a rejection 1 to 3 of the undesired bandwidth. The detectors in the dual band FPA are distributed over a hexagonal grid to maximize their physical size and then improve their sensitivity. The effective point spread function of the imager coupled to a black body point source over a wide frequency band (1:6) was demonstrated experimentally with excellent agreement to the one estimated by using the proposed spectral technique.",
keywords = "Detectors, Dual band, focal plane array, frequency selective absorber, Geometry, incoherent source, Inductance, Kinetic theory, Resonators, Security, Sub-mm wavelengths",
author = "Shahab Dabironezare and Juha Hassel and Erio Gandini and Leif Gronberg and Hannu Sipola and Visa Vesterinen and Nuria Llombart",
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A Dual Band Focal Plane Array of Kinetic Inductance Bolometers Based on Frequency Selective Absorbers. / Dabironezare, Shahab; Hassel, Juha; Gandini, Erio; Gronberg, Leif; Sipola, Hannu; Vesterinen, Visa; Llombart, Nuria.

In: IEEE Transactions on Terahertz Science and Technology, 01.01.2018.

Research output: Contribution to journalArticleResearchpeer-review

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AU - Gandini, Erio

AU - Gronberg, Leif

AU - Sipola, Hannu

AU - Vesterinen, Visa

AU - Llombart, Nuria

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N2 - Passive imaging cameras at sub-millimeter wavelengths with large format focal plane arrays are being developed as the next generation of security screening systems. In this contribution, a dual-band focal plane array (FPA) for security imagers at submillimeter wave frequencies is presented. The detectors are based on bolometric superconducting kinetic inductance resonators, which allows the development of large FPAs at medium cooled temperatures. Two frequency selective absorber (FSA) sets coupled to superconductive resonator lines are designed to implement a dual color security imager. The performance of the dual band imager is evaluated using spectral analysis approach that combines Fourier optics with a Floquet mode field representation. The geometry of the unit cells is based on a Jerusalem cross configuration and the designed FSAs show a stable angular response and a rejection 1 to 3 of the undesired bandwidth. The detectors in the dual band FPA are distributed over a hexagonal grid to maximize their physical size and then improve their sensitivity. The effective point spread function of the imager coupled to a black body point source over a wide frequency band (1:6) was demonstrated experimentally with excellent agreement to the one estimated by using the proposed spectral technique.

AB - Passive imaging cameras at sub-millimeter wavelengths with large format focal plane arrays are being developed as the next generation of security screening systems. In this contribution, a dual-band focal plane array (FPA) for security imagers at submillimeter wave frequencies is presented. The detectors are based on bolometric superconducting kinetic inductance resonators, which allows the development of large FPAs at medium cooled temperatures. Two frequency selective absorber (FSA) sets coupled to superconductive resonator lines are designed to implement a dual color security imager. The performance of the dual band imager is evaluated using spectral analysis approach that combines Fourier optics with a Floquet mode field representation. The geometry of the unit cells is based on a Jerusalem cross configuration and the designed FSAs show a stable angular response and a rejection 1 to 3 of the undesired bandwidth. The detectors in the dual band FPA are distributed over a hexagonal grid to maximize their physical size and then improve their sensitivity. The effective point spread function of the imager coupled to a black body point source over a wide frequency band (1:6) was demonstrated experimentally with excellent agreement to the one estimated by using the proposed spectral technique.

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