Advances in type-II superlattice research at Fraunhofer IAF

• Autorzy: Müller Raphael , Daumer Volker , Hugger Tsvetelina , Kirste Lutz , Luppold Wolfgang , Niemasz Jasmin , Rehm Robert , Stadelmann Tim , Wobrock Mark , Yang Quankui

Identyfikatory

DOI

10.24425/opelre.2023.144553

• Konferencja: Quantum Structure Infrared Photodetectors - QSIP : International Conference 2020/2022 (11 ; 2022 ; Kraków, Poland)
• Języki publikacji: EN

Abstrakty

EN

Current advances in type-II superlattice (T2SL) research at Fraunhofer IAF are elaborated on in this paper. First, the use of metastructures for quantum efficiency (QE) enhancement in the longwave infrared (LWIR) is presented. Finite element modelling results are reported on that suggest a potential for doubling of the QE at certain wavelengths with the investigated device structure. Next, characterisation results of midwave infrared (MIWR) InAs/InAsSb T2SL nBn detectors are shown. The low, diffusion-limited dark current above 120 K and a QE of 60% are comparable to the state-of-the-art. Finally, groundwork for InAs/GaSb T2SL MWIR/LWIR dual-band detector arrays based on a back-to-back heterojunction diode device concept is presented. The dry etching technology allows for steep etch trenches and full pixel reticulation with a fill factor of about 70% at 12 μm pitch. The detector characterisation at 77 K and ±250 mV bias demonstrates the bias-switchable operation mode with dark current densities of 6.1·10ˉ⁹ A/cm² in the MWIR and 5.3·10ˉ⁴ A/cm² in the LWIR.

Słowa kluczowe

EN

metastructures for QE enhancement; MWIR Ga-free T2SL nBn detectors; MWIR/LWIR dual-band technology

• Wydawca: Stowarzyszenie Elektryków Polskich ; Polska Akademia Nauk ; Wojskowa Akademia Techniczna im. Jarosława Dąbrowskiego
• Czasopismo: Opto-Electronics Review
• Rocznik: 2023
• Tom: Vol. 31, Special Issue
• Strony: art. no. e144553
• Opis fizyczny: Bibliogr. 29 poz., rys., wykr.

Twórcy

autor

Müller Raphael

• Fraunhofer Institute for Solid State Physics IAF, Tullastraße 72, 79108 Freiburg, Germany

autor

Daumer Volker

• Fraunhofer Institute for Solid State Physics IAF, Tullastraße 72, 79108 Freiburg, Germany

autor

Hugger Tsvetelina

• Fraunhofer Institute for Solid State Physics IAF, Tullastraße 72, 79108 Freiburg, Germany

autor

Kirste Lutz

• Fraunhofer Institute for Solid State Physics IAF, Tullastraße 72, 79108 Freiburg, Germany

autor

Luppold Wolfgang

• Fraunhofer Institute for Solid State Physics IAF, Tullastraße 72, 79108 Freiburg, Germany

autor

Niemasz Jasmin

• Fraunhofer Institute for Solid State Physics IAF, Tullastraße 72, 79108 Freiburg, Germany

autor

Rehm Robert

• Fraunhofer Institute for Solid State Physics IAF, Tullastraße 72, 79108 Freiburg, Germany

autor

Stadelmann Tim

• Fraunhofer Institute for Solid State Physics IAF, Tullastraße 72, 79108 Freiburg, Germany

autor

Wobrock Mark

• Fraunhofer Institute for Solid State Physics IAF, Tullastraße 72, 79108 Freiburg, Germany

autor

Yang Quankui

• Fraunhofer Institute for Solid State Physics IAF, Tullastraße 72, 79108 Freiburg, Germany

Bibliografia

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Uwagi

Opracowanie rekordu ze środków MEiN, umowa nr SONP/SP/546092/2022 w ramach programu "Społeczna odpowiedzialność nauki" - moduł: Popularyzacja nauki i promocja sportu (2022-2023).