Barrier in the valence band in the nBn detector with an active layer from the type-II superlattice

• Autorzy: Kopytko Małgorzata , Gomółka Emilia , Manyk Tetiana , Michalczewski Krystian , Kubiszyn Łukasz , Rutkowski Jaroslaw , Martyniuk Piotr

Identyfikatory

DOI

10.24425/opelre.2021.135823

• Języki publikacji: EN

Abstrakty

EN

Numerical analysis of the dark current (Id) in the type-II superlattice (T2SL) barrier (nBn) detector operated at high temperatures was presented. Theoretical calculations were compared with the experimental results for the nBn detector with the absorber and contact layers in an InAs/InAsSb superlattice separated AlAsSb barrier. Detector structure was grown using MBE technique on a GaAs substrate. The k·p model was used to determine the first electron band and the first heavy and light hole bands in T2SL, as well as to calculate the absorption coefficient. The paper presents the effect of the additional hole barrier on electrical and optical parameters of the nBn structure. According to the principle of the nBn detector operation, the electrons barrier is to prevent the current flow from the contact layer to the absorber, while the holes barrier should be low enough to ensure the flow of optically generated carriers. The barrier height in the valence band (VB) was adjusted by changing the electron affinity of a ternary AlAsSb material. Results of numerical calculations similar to the experimental data were obtained, assuming the presence of a high barrier in VB which, at the same time, lowered the detector current responsivity.

Słowa kluczowe

EN

infrared detector; T2SLs; superlattice; III-V materials; I-V characteristics

• Wydawca: Stowarzyszenie Elektryków Polskich ; Polska Akademia Nauk ; Wojskowa Akademia Techniczna im. Jarosława Dąbrowskiego
• Czasopismo: Opto-Electronics Review
• Rocznik: 2021
• Tom: Vol. 29, No. 1
• Strony: 1--4
• Opis fizyczny: Bibliogr. 18 poz., rys., tab., wykr.

Twórcy

autor

Kopytko Małgorzata

• Institute of Applied Physics, Military University of Technology, 2. Kaliskiego St., 00-908 Warsaw, Poland

• https://orcid.org/0000-0002-5838-3310

autor

Gomółka Emilia

• Institute of Applied Physics, Military University of Technology, 2. Kaliskiego St., 00-908 Warsaw, Poland

• https://orcid.org/0000-0002-6745-2824

autor

Manyk Tetiana

• Institute of Applied Physics, Military University of Technology, 2. Kaliskiego St., 00-908 Warsaw, Poland

• https://orcid.org/0000-0003-4362-4203

autor

Michalczewski Krystian

• Vigo System S.A., Poznańska 129/133, 05-850 Ożarów Mazowiecki, Poland

• https://orcid.org/0000-0002-4122-6554

autor

Kubiszyn Łukasz

• Vigo System S.A., Poznańska 129/133, 05-850 Ożarów Mazowiecki, Poland

autor

Rutkowski Jaroslaw

• Institute of Applied Physics, Military University of Technology, 2. Kaliskiego St., 00-908 Warsaw, Poland

• https://orcid.org/0000-0002-9092-755X

autor

Martyniuk Piotr

• Institute of Applied Physics, Military University of Technology, 2. Kaliskiego St., 00-908 Warsaw, Poland

• https://orcid.org/0000-0003-1963-3521

Bibliografia

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• [2] Olson, B. et al. Identification of dominant recombination mecha-nisms in narrow-bandgap InAs/InAsSb type-II superlattices and InAsSb alloys. Appl. Phys. Lett. 103, 052106 (2013). https://doi.org/10.1063/1.4817400
• [3] White, M., 1983. Infrared Detectors. U.S. Patent 4,679,063.
• [4] Klipstein, P., 2003. Depletionless photodiode with suppressed dark current and method for producing the same. U.S. Patent 7,795,640.
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• [13] Kopytko, M. et al. Numerical Analysis of Dark Currents in T2SL nBn Detector Grown by MBE on GaAs Substrate. Proceedings 27, 37 (2019), https://doi.org/10.3390/proceedings2019027037
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• [15] Livneh, Y. et al. k-p model for the energy dispersions and absorption spectra of InAs/GaSb type-II superlattices. Phys. Rev. B 86, 235311 (2012). https://doi.org/10.1103/PhysRevB.86.235311
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• [18] Manyk, T. et al. Method of electron affinity evaluation for the type-2 InAs/InAs1-xSbx superlattice. J. Mater. Sci. 55, 5135-5144 (2020).https://doi.org/10.1007/s10853-020-04347-6

Uwagi

1. Opracowanie rekordu ze środków MNiSW, umowa Nr 461252 w ramach programu "Społeczna odpowiedzialność nauki" - moduł: Popularyzacja nauki i promocja sportu (2021). 2. This work was supported by the funds GB/1/2018/205/ 2018/DA.