Polar-azimuthal angle dependent efficiency of different infrared superconducting nanowire single-photon detector designs

M. Csete, Áron Sipos, Faraz Najafi, Karl K. Berggren

Research output: Chapter in Book/Report/Conference proceedingConference contribution

1 Citation (Scopus)

Abstract

The illumination-angle-dependent absorptance was determined for three types of superconducting-nanowire singlephoton detector (SNSPD) designs: 1. periodic bare niobium-nitride (NbN) stripes with dimensions of conventional SNSPDs, 2. the same NbN patterns integrated with ~quarter-wavelength hydrogensilsesquioxane-filled nano- cavity, 3. similar cavity-integrated structures covered by a thin gold reflector. A three-dimensional finite-element method was applied to determine the optical response and near-field distribution as a function of p-polarized light illumination orientations specified by polar-angle, φ, and azimuthal-angle, γ. The numerical results proved that the NbN absorptance might be maximized via simultaneous optimization of the polar and azimuthal illumination angles. Complementary transfer-matrix-method calculations were performed on analogous film-stacks to uncover the phenomena contributing to the appearance of extrema on the optical response of NbN-patterns in P-structure-configuration. This comparative study showed that the absorptance of bare NbN patterns is zero at the angle corresponding to total internal reflection (TIR). In cavity-integrated structures the NbN absorptance curve indicates a maximum at the same orientation due to the phase shift introduced by the quarter-wavelength HSQ layer. The reflector promotes the NbN absorptance at small polar angles, but the available absorptance is limited by attenuated TIR in polar angle-intervals, where surface modes are excited on the gold film.

Original languageEnglish
Title of host publicationProceedings of SPIE - The International Society for Optical Engineering
Volume8155
DOIs
Publication statusPublished - 2011
EventInfrared Sensors, Devices, and Applications; and Single Photon Imaging II - San Diego, CA, United States
Duration: Aug 22 2011Aug 25 2011

Other

OtherInfrared Sensors, Devices, and Applications; and Single Photon Imaging II
CountryUnited States
CitySan Diego, CA
Period8/22/118/25/11

Fingerprint

Niobium
Single Photon Detector
Nitrides
Nanowires
absorptance
niobium
nitrides
nanowires
Infrared
Photons
Infrared radiation
Detectors
Angle
Dependent
detectors
photons
Total Internal Reflection
Illumination
Cavity
Lighting

Keywords

  • dual-angle dependence
  • integrated nano-cavity
  • optimized efficiency
  • reflector
  • SNSPD

ASJC Scopus subject areas

  • Applied Mathematics
  • Computer Science Applications
  • Electrical and Electronic Engineering
  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics

Cite this

Csete, M., Sipos, Á., Najafi, F., & Berggren, K. K. (2011). Polar-azimuthal angle dependent efficiency of different infrared superconducting nanowire single-photon detector designs. In Proceedings of SPIE - The International Society for Optical Engineering (Vol. 8155). [81551K] https://doi.org/10.1117/12.893879

Polar-azimuthal angle dependent efficiency of different infrared superconducting nanowire single-photon detector designs. / Csete, M.; Sipos, Áron; Najafi, Faraz; Berggren, Karl K.

Proceedings of SPIE - The International Society for Optical Engineering. Vol. 8155 2011. 81551K.

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Csete, M, Sipos, Á, Najafi, F & Berggren, KK 2011, Polar-azimuthal angle dependent efficiency of different infrared superconducting nanowire single-photon detector designs. in Proceedings of SPIE - The International Society for Optical Engineering. vol. 8155, 81551K, Infrared Sensors, Devices, and Applications; and Single Photon Imaging II, San Diego, CA, United States, 8/22/11. https://doi.org/10.1117/12.893879
Csete M, Sipos Á, Najafi F, Berggren KK. Polar-azimuthal angle dependent efficiency of different infrared superconducting nanowire single-photon detector designs. In Proceedings of SPIE - The International Society for Optical Engineering. Vol. 8155. 2011. 81551K https://doi.org/10.1117/12.893879
Csete, M. ; Sipos, Áron ; Najafi, Faraz ; Berggren, Karl K. / Polar-azimuthal angle dependent efficiency of different infrared superconducting nanowire single-photon detector designs. Proceedings of SPIE - The International Society for Optical Engineering. Vol. 8155 2011.
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