Informacja

Drogi użytkowniku, aplikacja do prawidłowego działania wymaga obsługi JavaScript. Proszę włącz obsługę JavaScript w Twojej przeglądarce.

Wyszukujesz frazę "InAs" wg kryterium: Temat


Wyświetlanie 1-13 z 13
Tytuł:
Detektory podczerwieni z supersieci II rodzaju układu InAs/GaInSb
Type-II InAs/GaInSb superlattices for infrared photodetectors
Autorzy:
Gawron, W.
Rogalski, A.
Powiązania:
https://bibliotekanauki.pl/articles/209342.pdf
Data publikacji:
2009
Wydawca:
Wojskowa Akademia Techniczna im. Jarosława Dąbrowskiego
Tematy:
detektory podczerwieni
kwantowe efekty rozmiarowe
supersieci II rodzaju z InAs/GaInSb
infrared detectors
low dimensional solids
type II InAs/GaInSb superlattices
Opis:
Artykuł przedstawia stan rozwoju nowej generacji detektorów podczerwieni fotodiod z supersieci II rodzaju ze związków InAs/GaInSb. O ich fundamentalnych właściwościach decydują kwantowe efekty rozmiarowe. Ta nowa tematyka badawcza została podjęta w VIGO System S.A. w ramach realizacji zadania nr 3 programu zamawianego PBZ-MNiSW 02/I/2007. Celem tego zadania jest opracowanie i zbadanie właściwości fotodiod detektorów podczerwieni na bazie supersieci. Podstawę do konstrukcji fotodiod będą stanowić struktury z supersieci II rodzaju z InAs/InGaSb, wykonane w ramach zadania nr 2 PBZ-MNiSW 02/I/2007 realizowanego równolegle w Instytucie Technologii Elektronowej.
This article presents state of the art of new generation of infrared detectors based on low dimensional solids type II InAs/GaSb superlattices for photovoltaic detectors. This new scientific program has been undertaken in VIGO System S.A. owing to realization of grant 3 PBZ-MNiSW 02/I/2007 supported by the Polish Ministry of Science and Higher Education.
Źródło:
Biuletyn Wojskowej Akademii Technicznej; 2009, 58, 4; 7-16
1234-5865
Pojawia się w:
Biuletyn Wojskowej Akademii Technicznej
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Application of cross-correlation-based transimpedance amplifier in InAs and InAsSb IR detectors noise measurements
Autorzy:
Achtenberg, Krzysztof
Mikołajczyk, Janusz
Bielecki, Zbigniew
Powiązania:
https://bibliotekanauki.pl/articles/2063907.pdf
Data publikacji:
2022
Wydawca:
Polska Akademia Nauk. Stowarzyszenie Elektryków Polskich
Tematy:
cross-correlation
IR detector
noise
transimpedance amplifier
InAs
InAsSb
Opis:
The paper presents noise measurements in low-resistance photodetectors using a crosscorrelation-based transimpedance amplifier. Such measurements usually apply a transimpedance amplifier design to provide a current fluctuation amplification. In the case of low-resistance sources, the measurement system causes additional relevant system noise which can be higher than noise generated in a tested detector. It mainly comes from the equivalent input voltage noise of the transimpedance amplifier. In this work, the unique circuit and a three-step procedure were used to reduce the floor noise, covering the measured infrared detector noise, mainly when operating with no-bias or low-bias voltage. The modified circuit and procedure to measure the noise of unbiased and biased detectors characterized by resistances much lower than 100 Ω were presented. Under low biases, the reference low-resistance resistors tested the measurement system operation and techniques. After the system verification, noise characteristics in low-resistance InAs and InAsSb infrared detectors were also measured.
Źródło:
Opto-Electronics Review; 2022, 30, 2; art. no. e141126
1230-3402
Pojawia się w:
Opto-Electronics Review
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Demonstration of HOT photoresponse of MWIR T2SLs InAs/InAsSb photoresistors
Autorzy:
Michalczewski, Krystian
Tsai, T. Y.
Martyniuk, P.
Wu, C. H.
Powiązania:
https://bibliotekanauki.pl/articles/201469.pdf
Data publikacji:
2019
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
HOT
MWIR
T2SLs
InAs/InAsSb
photoresistors
fotorezystory
Opis:
We report on the photoresponse of mid-wavelength infrared radiation (MWIR) type-II superlattices (T2SLs) InAs/InAsSb high operating temperature (HOT) photoresistor grown on GaAs substrate. The device consists of a 200 periods of active layer grown on GaSb buffer layer. The photoresistor reached a 50% cut-off wavelength of 5 μm and 6 μm at 200 K and 300 K respectively. The time constant of 30 ns is observed at 200 K under 1 V bias. This is the first observation of the photoresponse in MWIR T2SLs InAs/InAsSb above 200 K..
Źródło:
Bulletin of the Polish Academy of Sciences. Technical Sciences; 2019, 67, 1; 141-145
0239-7528
Pojawia się w:
Bulletin of the Polish Academy of Sciences. Technical Sciences
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Wpływ cząsteczek wody w B2O3 na właściwości niedomieszkowanych monokryształów InAs otrzymywanych metodą Czochralskiego
The influence of growth process parameters on properties of undoped InAs single crystals
Autorzy:
Orłowski, W.
Hruban, A.
Mirowska, A.
Strzelecka, S.
Powiązania:
https://bibliotekanauki.pl/articles/192040.pdf
Data publikacji:
2009
Wydawca:
Sieć Badawcza Łukasiewicz - Instytut Technologii Materiałów Elektronicznych
Tematy:
InAs
LEC
B2O3
własności elektryczne
electrical properties
Opis:
Opracowano warunki otrzymywania metodą Czochralskiego z hermetyzacją cieczową (Liquid Encapsulated Czochralski - LEC) bardzo czystych niedomieszkowanych monokryształów InAs typu n o ruchliwości elektronów μ > 22000 cm ² / Vs i koncentracji elektronów n < 3 x10^16 cm -³ w 300 K. Zbadano wpływ zawartości cząsteczek wody w topniku (B2O3) stosowanym do hermetyzacji stopionego wsadu na parametry elektryczne kryształów oraz na zawartość w nich domieszek resztkowych. Zbadano również wpływ czasu wygrzewania stopionego wsadu przed procesem krystalizacji na własności otrzymanych kryształów.
The aim of this work was to find out technological conditions that allow obtaining high purity undoped InAs single crystals with carrier concentration below 3xl0^16 cm -³ and carrier mobility over 22000 cm ² / Vs. Synthesis by injection method and Liquid Encapsulated Czochralski (LEC) crystal growth were applied. The influence of water content in B2O3 encapsulant (applied during injection synthesis and LEC growth) on electrical properties of InAs crystals and especially on dopants concentration was investigated. The influence of charge annealing duration before crystallization process on InAs crystals properties was also investigated.
Źródło:
Materiały Elektroniczne; 2009, T. 37, nr 2, 2; 15-21
0209-0058
Pojawia się w:
Materiały Elektroniczne
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
High performance type-II InAs/GaSb superlattice infrared photodetectors with a short cut-off wavelength
Autorzy:
Delmas, Marie
Ramos, David
Ivanov, Ruslan
Žurauskaitė, Laura
Evans, Dean
Rihtnesberg, David
Almqvist, Susanne
Becanovic, Smilja
Costard, Eric
Höglund, Linda
Powiązania:
https://bibliotekanauki.pl/articles/2204225.pdf
Data publikacji:
2023
Wydawca:
Polska Akademia Nauk. Stowarzyszenie Elektryków Polskich
Tematy:
infrared detectors
short-wavelength infrared
InAs/GaSb superlattice
type-II superlattice
Opis:
This work investigates the potential of InAs/GaSb superlattice detectors for the shortwavelength infrared spectral band. A barrier detector structure was grown by molecular beam epitaxy and devices were fabricated using standard photolithography techniques. Optical and electrical characterisations were carried out and the current limitations were identified. The authors found that the short diffusion length of ~1.8 µm is currently limiting the quantum efficiency (double-pass, no anti-reflection coating) to 43% at 2.8 µm and 200 K. The dark current density is limited by the surface leakage current which shows generation-recombination and diffusion characters below and above 195 K, respectively. By fitting the size dependence of the dark current, the bulk values have been estimated to be 6.57·10ˉ⁶ A/cm² at 200 K and 2.31·10ˉ⁶ A/cm² at 250 K, which is only a factor of 4 and 2, respectively, above the Rule07.
Źródło:
Opto-Electronics Review; 2023, 31, Special Issue; art. no. e144555
1230-3402
Pojawia się w:
Opto-Electronics Review
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Performance analysis of an InAs/GaSb superlattice barrier photodetector covering the full LWIR spectral domain
Autorzy:
Alchaar, Rodolphe
Rodriguez, Jean-Baptiste
Höglund, L.
Naureen, Shagufta
Costard, Eric
Christol, Philippe
Powiązania:
https://bibliotekanauki.pl/articles/1818240.pdf
Data publikacji:
2020
Wydawca:
Polska Akademia Nauk. Stowarzyszenie Elektryków Polskich
Tematy:
barrier photodetector
InAs/GaSb type-2 superlattice
long wavelength infrared
performance analysis
Opis:
In this paper, we present the electrical and electro-optical characterizations of an InAs/GaSb type-2 superlattice barrier photodetector operating in the full longwave infrared spectral domain. The fabricated detectors exhibited a 50% cut-off wavelength around 14 μm at 80 K and a quantum efficiency slightly above 20%. The dark current density was of 4.6×10⁻² A/cm² at 80 K and a minority carrier lateral diffusion was evaluated through dark current measurements on different detector sizes. In addition, detector spectral response, its dark current-voltage characteristics and capacitance-voltage curve accompanied by electric field simulations were analyzed in order to determine the operating bias and the dark current regimes at different biases. Finally, dark current simulations were also performed to estimate a minority carrier lifetime by comparing experimental curves with simulated ones.
Źródło:
Opto-Electronics Review; 2020, 28, 3; 164--170
1230-3402
Pojawia się w:
Opto-Electronics Review
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Performance analysis of an InAs/GaSb superlattice barrier photodetector covering the full LWIR spectral domain
Autorzy:
Alchaar, R.
Rodriguez, J.-B.
Höglund, L.
Naureen, S.
Costard, E.
Christol, P.
Powiązania:
https://bibliotekanauki.pl/articles/1818247.pdf
Data publikacji:
2020
Wydawca:
Polska Akademia Nauk. Stowarzyszenie Elektryków Polskich
Tematy:
barrier photodetector
InAs/GaSb type-2 superlattice
long wavelength infrared
performance analysis
Opis:
In this paper, we present the electrical and electro-optical characterizations of an InAs/GaSb type-2 superlattice barrier photodetector operating in the full longwave infrared spectral domain. The fabricated detectors exhibited a 50% cut-off wavelength around 14 μm at 80 K and a quantum efficiency slightly above 20%. The dark current density was of 4.6×10⁻² A/cm² at 80 K and a minority carrier lateral diffusion was evaluated through dark current measurements on different detector sizes. In addition, detector spectral response, its dark current-voltage characteristics and capacitance-voltage curve accompanied by electric field simulations were analyzed in order to determine the operating bias and the dark current regimes at different biases. Finally, dark current simulations were also performed to estimate a minority carrier lifetime by comparing experimental curves with simulated ones.
Źródło:
Opto-Electronics Review; 2020, 28, 3; 164--170
1230-3402
Pojawia się w:
Opto-Electronics Review
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:
Carrier concentration and in-plane mobility in both non-intentionally and Si-doped InAsSb and InAs/InAsSb type-II superlattice materials for space-based infrared detectors
Autorzy:
Morath, Christian P.
Casias, Lilian K.
Umana-Membreno, Gilberto A.
Webster, Preston T.
Grant, Perry C.
Maestas, Diana
Cowan, Vincent M.
Faraone, Lorenzo
Krishna, Sanjay
Balakrishnan, Ganesh
Powiązania:
https://bibliotekanauki.pl/articles/2204224.pdf
Data publikacji:
2023
Wydawca:
Polska Akademia Nauk. Stowarzyszenie Elektryków Polskich
Tematy:
III-V infrared detectors
Bulk InAsSb
InAsSb/InAs superlattice
mobility
carrier concentration
Opis:
The sensitivity of III-V-based infrared detectors is critically dependent upon the carrier concentration and mobility of the absorber layer, and thus, accurate knowledge of each is required to design structures for maximum detector performance. Here, measurements of the bulk in-plane resistivity, in-plane mobility, and carrier concentration as a function of temperature are reported for non-intentionally doped and Si-doped mid-wave infrared InAs₀.₉₁Sb₀.₀₉ alloy and InAs/InAs₀.₆₅Sb₀.₃₅ type-II superlattice materials grown on GaSb substrates. Standard temperature- and magnetic-field-dependent resistivity and the Hall measurements on mesa samples in the van der Pauw configuration are performed, and multicarrier fitting and modelling are used to isolate transport of each carrier species. The results show that up to 5 carrier species of the surface, interface and bulk variety contribute to conduction, with bulk electron and hole mobility up to 2·10⁵ cm²/V s and 8·10³ cm²/V s, respectively and background dopant concentration levels were between 10¹⁴ and 10¹⁵ cm¯³. The in-plane mobility temperatures dependence is determined and trends of each carrier species with temperature and dose are analysed.
Źródło:
Opto-Electronics Review; 2023, 31, Special Issue; art. no. e144554
1230-3402
Pojawia się w:
Opto-Electronics Review
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
InAs/InAsSb superlattice infrared detectors
Autorzy:
Ting, David Z.
Soibel, Alexander
Khoshakhlagh, Arezou
Keo, Sam A.
Rafol, Sir B.
Fisher, Anita M.
Hill, Cory J.
Pepper, Brian J.
Maruyama, Yuki
Gunapala, Sarath D.
Powiązania:
https://bibliotekanauki.pl/articles/2204211.pdf
Data publikacji:
2023
Wydawca:
Polska Akademia Nauk. Stowarzyszenie Elektryków Polskich
Tematy:
infrared detector
type-II superlattice
InAs/InAsSb
complementary barrier infrared detectors
strained layer superlattice
Opis:
Mid-wavelength infrared detectors and focal plane array based on n-type InAs/InAsSb type- II strained layer superlattice absorbers have achieved excellent performance. In the long and very long wavelength infrared, however, n-type InAs/InAsSb type-II strained layer superlattice detectors are limited by their relatively small absorption coefficients and short growth-direction hole diffusion lengths, and consequently have only been able to achieve modest level of quantum efficiency. The authors present an overview of their progress in exploring complementary barrier infrared detectors that contain p-type InAs/InAsSb type-II strained layer superlattice absorbers for quantum efficiency enhancement. The authors describe some representative results, and also provide additional references for more indepth discussions. Results on InAs/InAsSb type-II strained layer superlattice focal plane arrays for potential NASA applications are also briefly discussed.
Źródło:
Opto-Electronics Review; 2023, 31, Special Issue; art. no. e144565
1230-3402
Pojawia się w:
Opto-Electronics Review
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Design and performance of dual-band MWIR/LWIR focal plane arrays based on a type-II superlattice nBn structure
Autorzy:
Lee, Hyun-Jin
Eom, Jun Ho
Jung, Hyun Chul
Kang, Ko-Ku
Ryu, Seong Min
Jang, Ahreum
Kim, Jong Gi
Kim, Young Ho
Jung, Han
Kim, Sun Ho
Choi, Jong Hwa
Powiązania:
https://bibliotekanauki.pl/articles/2204217.pdf
Data publikacji:
2023
Wydawca:
Polska Akademia Nauk. Stowarzyszenie Elektryków Polskich
Tematy:
InAs/GaSb type-II superlattice
dualband detector
dark current
spectral quantum efficiency
noise equivalent temperature difference
Opis:
Dual-band infrared detector, which acquires more image information than single-band detectors, has excellent detection, recognition, and identification capabilities. The dual-band detector can have two bumps to connect with each absorber layer, but it is difficult to implement small pitch focal plane arrays and its fabrication process is complicated. Therefore, the most effective way for a dual-band detector is to acquire each band by biasselectable with one bump. To aim this, a dual-band MWIR/LWIR detector based on an InAs/GaSb type-II superlattice nBn structure was designed and its performance was evaluated in this work. Since two absorber layers were separated by the barrier layer, each band can be detected by bias-selectable with one bump. The fabricated dual-band device exhibited the dark current and spectral response characteristics of MWIR and LWIR bands under negative and positive bias, respectively. Spectral crosstalk that is a major issue in dualband detectors was also improved. Finally, a 20 µm pitch 640 x 512 dual-band detector was fabricated, and both MWIR and LWIR images exhibited an average noise equivalent temperature difference of 30 mK or less at 80 K.
Źródło:
Opto-Electronics Review; 2023, 31, Special Issue; art. no. e144560
1230-3402
Pojawia się w:
Opto-Electronics Review
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Growth and characterisation of LWIR T2SL on (100)-, (211)- and (311)-oriented GaSb substrates
Autorzy:
Lubyshev, Dmitri
Fastenau, Joel M.
Kattner, Michael
Frey, Philip
Nelson, Scott A.
Flick, Ryan
Wu, Ying
Liu, Amy W. K.
Szymanski, Dennis E.
Martinez, Becky
Furlong, Mark J.
Dennis, Richard
Bundas, Jason
Sundaram, Mani
Powiązania:
https://bibliotekanauki.pl/articles/2204213.pdf
Data publikacji:
2023
Wydawca:
Polska Akademia Nauk. Stowarzyszenie Elektryków Polskich
Tematy:
focal plane arrays
InAs/InAsSb
photodetectors
long wavelength infrared type-II superlattice
metamorphic buffers
superlattice period reduction
Opis:
Ga-free InAs/InAsSb type-II superlattice structures grown on GaSb substrates have demonstrated high performance for mid-wave infrared applications. However, realisation of long wavelength infrared photodetectors based on this material system still presents challenges, especially in terms of reduced quantum efficiency. This reduction is due, in part, to the increased type-II superlattice period required to attain longer wavelengths, as thicker periods decrease the wave-function overlap for the spatially separated quantum wells. One way to improve long wavelength infrared performance is to modify the type-II superlattice designs with a shorter superlattice period for a given wavelength, thereby increasing the wave-function overlap and the resulting optical absorption. Long wavelength infrared epitaxial structures with reduced periods have been realised by shifting the lattice constant of the type-II superlattice from GaSb to AlSb. Alternatively, epitaxial growth on substrates with orientations different than the traditional (100) surface presents another way for superlattice period reduction. In this work, the authors evaluate the performance of long wavelength infrared type-II superlattice detectors grown by molecular beam epitaxy using two different approaches to reduce the superlattice period: first, a metamorphic buffer to target the AlSb lattice parameter, and second, structures lattices matched to GaSb using substrates with different orientations. The use of the metamorphic buffer enabled a ~30% reduction in the superlattice period compared to reference baseline structures, maintaining a high quantum efficiency, but with the elevated dark current related to defects generated in the metamorphic buffer. Red-shift in a cut-off wavelength obtained from growths on highindex substrates offers a potential path to improve the infrared photodetector characteristics. Focal plane arrays were fabricated on (100), (311)A- and (211)B-oriented structures to compare the performance of each approach.
Źródło:
Opto-Electronics Review; 2023, 31, Special Issue; art. no. e144568
1230-3402
Pojawia się w:
Opto-Electronics Review
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Measurements of low frequency noise of infrared photo-detectors with transimpedance detection system
Autorzy:
Ciura, Ł.
Kolek, A.
Gawron, W.
Kowalewski, A.
Stanaszek, D.
Powiązania:
https://bibliotekanauki.pl/articles/221094.pdf
Data publikacji:
2014
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
1/f noise
infrared detectors
nBn structure
HgCdTe heterostructures
noise measurements
transimpedance detection system
type II InAs/GaSb superlattice
Opis:
The paper presents the method and results of low-frequency noise measurements of modern mid-wavelength infrared photodetectors. A type-II InAs/GaSb superlattice based detector with nBn barrier architecture is compared with a high operating temperature (HOT) heterojunction HgCdTe detector. All experiments were made in the range 1 Hz - 10 kHz at various temperatures by using a transimpedance detection system, which is examined in detail. The power spectral density of the nBn’s dark current noise includes Lorentzians with different time constants while the HgCdTe photodiode has more uniform 1/f - shaped spectra. For small bias, the low-frequency noise power spectra of both devices were found to scale linearly with bias voltage squared and were connected with the fluctuations of the leakage resistance. Leakage resistance noise defines the lower noise limit of a photodetector. Other dark current components give raise to the increase of low-frequency noise above this limit. For the same voltage biasing devices, the absolute noise power densities at 1 Hz in nBn are 1 to 2 orders of magnitude lower than in a MCT HgCdTe detector. In spite of this, low-frequency performance of the HgCdTe detector at ~ 230K is still better than that of InAs/GaSb superlattice nBn detector.
Źródło:
Metrology and Measurement Systems; 2014, 21, 3; 461-472
0860-8229
Pojawia się w:
Metrology and Measurement Systems
Dostawca treści:
Biblioteka Nauki
Artykuł
    Wyświetlanie 1-13 z 13

    Ta witryna wykorzystuje pliki cookies do przechowywania informacji na Twoim komputerze. Pliki cookies stosujemy w celu świadczenia usług na najwyższym poziomie, w tym w sposób dostosowany do indywidualnych potrzeb. Korzystanie z witryny bez zmiany ustawień dotyczących cookies oznacza, że będą one zamieszczane w Twoim komputerze. W każdym momencie możesz dokonać zmiany ustawień dotyczących cookies