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    Wyświetlanie 1-4 z 4
    Tytuł:
    Comparison of performance limits of the HOT HgCdTe photodiodes with colloidal quantum dot infrared detectors
    Autorzy:
    Rogalski, A.
    Kopytko, M.
    Martyniuk, P.
    Hu, W.
    Powiązania:
    https://bibliotekanauki.pl/articles/201444.pdf
    Data publikacji:
    2020
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    colloidal quantum dot infrared photodetectors
    HOT infrared detectors
    HgCdTe photodiodes
    p-i-n depleted photodiodes
    BLIP performance
    Opis:
    In the past decade, there has been significant progress in development of the colloidal quantum dot (CQD) photodetectors. The QCD’s potential advantages include: cheap and easy fabrications, size-tuneable across wide infrared spectral region, and direct coating on silicon electronics for imaging, which potentially reduces array cost and offers new modifications like flexible infrared detectors. The performance of CQD high operating temperature (HOT) photodetectors is lower in comparison with detectors traditionally available on the global market (InGaAs, HgCdTe and type-II superlattices). In several papers their performance is compared with the semiempirical rule, “Rule 07” (specified in 2007) for P-on-n HgCdTe photodiodes. However, at present stage of technology, the fully-depleted background limited HgCdTe photodiodes can achieve the level of room-temperature dark current considerably lower than predicted by Rule 07. In this paper, the performance of HOT CQD photodetectors is compared with that predicted for depleted P-i-N HgCdTe photodiodes. Theoretical estimations are collated with experimental data for both HgCdTe photodiodes and CQD detectors. The presented estimates provide further encouragement for achieving low-cost and high performance MWIR and LWIR HgCdTe focal plane arrays operating in HOT conditions.
    Źródło:
    Bulletin of the Polish Academy of Sciences. Technical Sciences; 2020, 68, 4; 845-855
    0239-7528
    Pojawia się w:
    Bulletin of the Polish Academy of Sciences. Technical Sciences
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Theoretical Simulation of a Room Temperature HgCdTe Long-Wave Detector for Fast Response - Operating Under Zero Bias Conditions
    Autorzy:
    Martyniuk, P.
    Kopytko, M.
    Madejczyk, P.
    Henig, A.
    Grodecki, K.
    Gawron, W.
    Rutkowski, J.
    Powiązania:
    https://bibliotekanauki.pl/articles/221111.pdf
    Data publikacji:
    2017
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    response time
    unbiased condition
    HgCdTe
    LWIR
    higher operating temperature
    Opis:
    The paper reports on a long-wave infrared (cut-off wavelength ~ 9 μm) HgCdTe detector operating under nbiased condition and room temperature (300 K) for both short response time and high detectivity operation. The ptimal structure in terms of the response time and detectivity versus device architecture was shown. The response time of the long-wave (active layer Cd composition, xCd = 0.19) HgCdTe detector for 300 K was calculated at a level of τs ~ 1 ns for zero bias condition, while the detectivity - at a level of D* ~ 109 cmHz1/2/W assuming immersion. It was presented that parameters of the active layer and P+ barrier layer play a critical role in order to reach τs ≤ 1 ns. An extra series resistance related to the processing (RS+ in a range 5-10 Ω) increased the response time more than two times (τs ~ 2.3 ns).
    Źródło:
    Metrology and Measurement Systems; 2017, 24, 4; 729-738
    0860-8229
    Pojawia się w:
    Metrology and Measurement Systems
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Mid-wave InAs/GaSb superlattice barrier infrared detectors with nBnN and pBnN design
    Autorzy:
    Gomółka, E.
    Markowska, O.
    Kopytko, M.
    Kowalewski, A.
    Martyniuk, P.
    Rogalski, A.
    Rutkowski, J.
    Motyka, M.
    Krishna, S.
    Powiązania:
    https://bibliotekanauki.pl/articles/201992.pdf
    Data publikacji:
    2018
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    InAs/GaSb type-II superlattices
    infrared detectors
    barrier detectors
    nBn detector
    p-i-n detector
    InAs
    GaSb
    detektory podczerwieni
    detektor bariery
    detektor nBn
    detektory p-i-n
    Opis:
    We present an investigation of optical and electrical properties of mid-wavelength infrared (MWIR) detectors based on InAs/GaSb strained layer superlattices (SLs) with nBnN and pBnN design. The temperature-dependent behavior of the bandgap was investigated on the basis of absorption measurements. A 50% cut-off wavelength of around 4.5 μm at 80 K and increase of up to 5.6 μm at 290 K was found. Values of Varshni parameters, zero temperature bandgap E0 and empirical coefficients α and β were extracted. Arrhenius plots of dark currents of nBnN and pBnN detectors were compared with the p-i-n design. Dark current density reduction in nBnN and pBnN detectors is observed in comparison to the p-i-n device. This shows a suppression of Shockley-Read-Hall (SRH) processes by means of introducing barrier architecture.
    Źródło:
    Bulletin of the Polish Academy of Sciences. Technical Sciences; 2018, 66, 3; 317-323
    0239-7528
    Pojawia się w:
    Bulletin of the Polish Academy of Sciences. Technical Sciences
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Fast Response Hot (111) HGCDTE MWIR Detectors
    Autorzy:
    Grodecki, K.
    Martyniuk, P.
    Kopytko, M.
    Kowalewski, A.
    Stępień, D.
    Kębłowski, A.
    Piotrowski, A.
    Piotrowski, J.
    Gawron, W.
    Rogalski, A.
    Powiązania:
    https://bibliotekanauki.pl/articles/221254.pdf
    Data publikacji:
    2017
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    HgCdTe
    MWIR
    photodetector
    response time
    Opis:
    In this work we report simulation and experimental results for an MWIR HgCdTe photodetector designed by computer simulation and fabricated in a joint laboratory run by VIGO Sytems S.A. and Military University of Technology. The device is based on a modified N+pP+ heterostructure grown on 2”., epiready, semi-insulating (100) GaAs substrates in a horizontal MOCVD AIX 200 reactor. The devices were examined by measurements of spectral and time responses as a function of a bias voltage and operating temperatures. The time response was measured with an Optical Parametric Oscillator (OPO) as the source of ~25 ps pulses of infrared radiation, tuneable in a 1.55–16 μm spectral range. Two-stage Peltier cooled devices (230 K) with a 4.1 μm cut-off wavelength were characterized by 1.6 × 1012 cm Hz1/2/W peak detectivity and < 1 ns time constant for V > 500 mV.
    Źródło:
    Metrology and Measurement Systems; 2017, 24, 3; 509-514
    0860-8229
    Pojawia się w:
    Metrology and Measurement Systems
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
      Wyświetlanie 1-4 z 4

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