1/f Noise and Dark Current Correlation in Midwave InAs/GaSb Type-II Superlattice IR DetectorsShow others and affiliations
2021 (English)In: Physica Status Solidi (A): Applications and Materials Science, ISSN 1862-6300, E-ISSN 1862-6319, Vol. 218, no 3, p. 2000557-Article in journal (Refereed) Published
Abstract [en]
Herein, results from noise and dark current density studies on InAs/GaSb type-II superlattice IR detectors are presented. The activation energy of the dark current density is used to identify the dominating dark current mechanisms (generation–recombination (GR), tunneling, or diffusion dark current) as a function of temperature and bias. The bias evolution of the power spectral density (PSD) is measured in dark conditions for several temperatures. At the operating bias of the detectors, the arrays show a white noise–dominated spectrum up to 100 K with a minor 1/f contribution (corner frequency around 10 Hz), while for higher temperatures the spectra are 1/f dominated. The 1/f noise component is compared to the dominating dark current mechanism in the same temperature and bias regimes. A strong correlation between the 1/f noise component and the dominating dark current (I) is found, with the PSD proportional to I for tunneling currents and I2 for GR and diffusion currents. Very low noise coefficients of αGR = 4.8 × 10−9 Hz−1, αdiff = 1.9 × 10−10 Hz−1, and αtun = 2.1 × 10−16 A Hz−1 are observed for these detectors.
Place, publisher, year, edition, pages
Wiley-VCH Verlag , 2021. Vol. 218, no 3, p. 2000557-
Keywords [en]
1/f noise, activation energy, dark current, IR detectors, type-II superlattice, Edge detection, III-V semiconductors, Indium antimonides, Indium arsenide, Infrared detectors, Power spectral density, Spectral density, White noise, Corner frequency, Current mechanisms, Dark conditions, Diffusion currents, Inas/gasb type-ii superlattices, Power spectral densities (PSD), Strong correlation, Tunneling current, Dark currents
National Category
Condensed Matter Physics
Identifiers
URN: urn:nbn:se:kth:diva-285318DOI: 10.1002/pssa.202000557ISI: 000578553300001Scopus ID: 2-s2.0-85092284613OAI: oai:DiVA.org:kth-285318DiVA, id: diva2:1505871
Note
QC 20201202
2020-12-022020-12-022025-12-01Bibliographically approved
In thesis