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Artículos de revistas sobre el tema "MidWave Infrared (MWIR)"

Autor: Grafiati
Publicado: 25 de mayo de 2024
Última modificación: 31 de julio de 2025

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1

Scafutto, Rebecca, and Carlos de Souza Filho. "Detection of Methane Plumes Using Airborne Midwave Infrared (3–5 µm) Hyperspectral Data." Remote Sensing 10, no. 8 (2018): 1237. http://dx.doi.org/10.3390/rs10081237.

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Methane (CH4) display spectral features in several regions of the infrared range (0.75–14 µm), which can be used for the remote mapping of emission sources through the detection of CH4 plumes from natural seeps and leaks. Applications of hyperspectral remote sensing techniques for the detection of CH4 in the near and shortwave infrared (NIR-SWIR: 0.75–3 µm) and longwave infrared (LWIR: 7–14 µm) have been demonstrated in the literature with multiple sensors and scenarios. However, the acquisition and processing of hyperspectral data in the midwave infrared (MWIR: 3–5 µm) for this application is
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2

Kim, Yerin, and Sungwook Hong. "Deep Learning-Generated Nighttime Reflectance and Daytime Radiance of the Midwave Infrared Band of a Geostationary Satellite." Remote Sensing 11, no. 22 (2019): 2713. http://dx.doi.org/10.3390/rs11222713.

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Midwave infrared (MWIR) band of 3.75 μm is important in satellite remote sensing in many applications. This band observes daytime reflectance and nighttime radiance according to the Earth’s and the Sun’s effects. This study presents an algorithm to generate no-present nighttime reflectance and daytime radiance at MWIR band of satellite observation by adopting the conditional generative adversarial nets (CGAN) model. We used the daytime reflectance and nighttime radiance data in the MWIR band of the meteoritical imager (MI) onboard the Communication, Ocean and Meteorological Satellite (COMS), a
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3

Bouschet, Maxime, Vignesh Arounassalame, Anthony Ramiandrasoa, et al. "Temperature Dependence Study of Electrical and Electro-Optical Performances of Midwave Infrared Ga-Free T2SL Barrier Photodetector." Applied Sciences 12, no. 20 (2022): 10358. http://dx.doi.org/10.3390/app122010358.

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In this paper, we report on temperature dependence performances of a midwave infrared (MWIR) Ga-free InAs/InAsSb type-II superlattice (T2SL) barrier (XBn) photodetector grown by molecular beam epitaxy on n-type GaSb substrate. The T2SL structure, with a 3 µm thick active region, was processed in a mesa device in order to perform dark current measurements and spectral photoresponse as a function of temperature. Analyses of these temperature dependence characterizations help us to improve the design of Ga-free T2SL MWIR XBn detectors.
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4

Kumari, K. C. Goma, H. M. Rawool, and S. Chakrabarti. "Demonstration of Fabricated Midwave Infrared InAs/GaSb Type-II Superlattice-based Focal Plane Arrays." Defence Science Journal 67, no. 2 (2017): 149. http://dx.doi.org/10.14429/dsj.67.11178.

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In this study, fabricated 320 × 256 infrared focal plane arrays (FPAs) were realised using a GaSb/InAs-based type-II superlattice heterostructure for midwave infrared (MWIR) imaging. We report here the optimized fabrication and characterization of single-pixel infrared detectors and FPAs. MWIR spectral response up to 5 μm of these single-pixel detectors was evident up to 250 K. Responsivity was measured to be 1.62 A/W at 0.8 V and 80 K. Current–voltage characteristics at room temperature (300 K) and at low temperature (18 K) revealed the resistance and dark current variation of the device in t
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5

Rudy, Richard J., Ray W. Russell, David K. Lynch, and Michael L. Sitko. "The Early Infrared Spectrum of the Fe ii Nova V1310 Scorpii." Research Notes of the AAS 9, no. 4 (2025): 91. https://doi.org/10.3847/2515-5172/adcd77.

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Abstract V1310 Scorpii (Nova Scorpii 2010, No. 1) was an Fe ii-type nova whose early spectral properties are broadly representative of the class. We present a 0.8–5.2 μm spectrum from 11 days after peak brightness that exhibit these properties. In addition to the emission lines of C i, N i, and O i, V1310 Sco also shows the well-known one and two micron Fe ii lines as well as midwave infrared (MWIR) Fe ii lines not previously reported in novae. The strongest of the MWIR Fe ii lines all descend from the same term (c4P), a term that is different from those that produce the one and two micron Fe
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6

Platnick, Steven, Kerry Meyer, Nandana Amarasinghe, Galina Wind, Paul A. Hubanks, and Robert E. Holz. "Sensitivity of Multispectral Imager Liquid Water Cloud Microphysical Retrievals to the Index of Refraction." Remote Sensing 12, no. 24 (2020): 4165. http://dx.doi.org/10.3390/rs12244165.

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A cloud property retrieved from multispectral imagers having spectral channels in the shortwave infrared (SWIR) and/or midwave infrared (MWIR) is the cloud effective particle radius (CER), a radiatively relevant weighting of the cloud particle size distribution. The physical basis of the CER retrieval is the dependence of SWIR/MWIR cloud reflectance on the cloud particle single scattering albedo, which in turn depends on the complex index of refraction of bulk liquid water (or ice) in addition to the cloud particle size. There is a general consistency in the choice of the liquid water index of
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7

Kelly, Michael A., James L. Carr, Dong L. Wu, Arnold C. Goldberg, Ivan Papusha, and Renee T. Meinhold. "Compact Midwave Imaging System: Results from an Airborne Demonstration." Remote Sensing 14, no. 4 (2022): 834. http://dx.doi.org/10.3390/rs14040834.

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The Compact Midwave Imaging System (CMIS) is a wide field of view, multi-angle, multi-spectral pushframe imager that relies on the forward motion of the satellite to create a two-dimensional (2D) image swath. An airborne demonstration of CMIS was successfully completed in January–February 2021 on the NASA Langley Research Center Gulfstream III. The primary objective of the four-flight campaign was to demonstrate the capability of this unique instrument to perform stereo observations of clouds and other particulates (e.g., smoke) in the atmosphere. It is shown that the midwave infrared (MWIR) s
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8

Sharma, Anurag, Jyoti kedia, and Neena Gupta. "Numerical demonstration of low-dark-current photodetector using phoxonic crystal waveguide for midwave infrared (MWIR) sensing." Sensors and Actuators A: Physical 391 (September 2025): 116634. https://doi.org/10.1016/j.sna.2025.116634.

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9

Pelta, Ran, and Eyal Ben-Dor. "An Exploratory Study on the Effect of Petroleum Hydrocarbon on Soils Using Hyperspectral Longwave Infrared Imagery." Remote Sensing 11, no. 5 (2019): 569. http://dx.doi.org/10.3390/rs11050569.

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Manmade crude oil contamination, which has negative impacts on the environment and human health, can be found in various ecosystems all over the globe. Hyperspectral remote sensing (HRS) is an efficient tool to investigate this crude oil contamination where its electromagnetic spectrum is analyzed. This exploratory study used an innovative HRS imagery sensor to study the effect of petroleum hydrocarbon (PHC), found in crude oil, on the spectrum of soils across the longwave infrared (LWIR 8–12 μm) spectral region. This contrasts with previous studies that focused on shortwave and midwave infrar
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10

Chen, Weiyu, Ko-Han Shih, and C. Kyle Renshaw. "Dispersive Sweatt Model for Broadband Lens Design with Metasurfaces." Photonics 12, no. 1 (2025): 43. https://doi.org/10.3390/photonics12010043.

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The Sweatt model has been extensively used to design optical systems containing diffractive optical elements (DOEs) because it captures the dispersive characteristics of DOEs. We introduce a new dispersive Sweatt model (DSM) that can describe meta-atom (MA) dispersion, which has material and geometric contributions in addition to diffraction. It uses a wavelength-dependent scalar coefficient to modify the diffractive dispersion and describe the dispersion of a given MA basis. This provides a robust framework to design systems containing metasurface (MS) elements while including their unique di
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11

Kim, Jae Ik, Naoki Higashitarumizu, Shu Wang, et al. "Multicolor Inks of Black Phosphorus for Midwave‐Infrared Optoelectronics." Advanced Materials, May 21, 2024. http://dx.doi.org/10.1002/adma.202402922.

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AbstractBlack phosphorus (bP) based ink with a bulk bandgap of 0.33 eV (λ = 3.7 µm) has recently been shown to be promising for large‐area, high performance mid‐wave infrared (MWIR) optoelectronics. However, the development of multicolor bP inks expanding across the MWIR wavelength range has been challenging. Here we demonstrate a multicolor ink process based on bP with spectral emission tuned from 0.28 eV (λ ∼ 4.4 µm) to 0.8 eV (λ ∼ 1.5 µm). Specifically, through the reduction of bP particle size distribution (i.e., lateral dimension and thickness), the optical bandgap systematically blue‐shi
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12

sharma, Anurag, Jyoti kedia, and Neena Gupta. "Mathematical model for enhancing midwave infrared transmission using phoxonic crystals." Physica Scripta, December 17, 2024. https://doi.org/10.1088/1402-4896/ada073.

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Abstract This paper presents a novel mathematical model for designing a highly efficient on-chip optical waveguide operating in the Mid-Wave Infrared (MWIR) spectrum, specifically covering a range from 3-5μm. The proposed waveguide (called Phoxonic waveguide) architecture achieves exceptional transmission rates of up to 99.8% throughout this broad range of MWIR. The simultaneous control of photon and phonon transmission in the proposed waveguide structure gives its name Phoxonic crystal waveguide. The exceptional performance in the proposed waveguide structure has been achieved due to the inno
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13

Jackson, E. M., C. S. Kim, M. Kim, et al. "Midwave infrared resonant cavity detectors with >70% quantum efficiency." Applied Physics Letters 125, no. 25 (2024). https://doi.org/10.1063/5.0243497.

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We report resonant cavity infrared detectors with a peak wavelength of 4.54–4.58 μm that combine external quantum efficiency (EQE) exceeding 70% with spectral bandwidth 20–40 nm and ≤2% EQE at all non-resonance wavelengths between 4 and 5 μm. A 300-nm-thick absorber assures that most of the radiation propagating in the cavity produces photocurrent rather than parasitic loss. The cavity is formed by heterogeneously bonding a midwave infrared (MWIR) nBn detector chip to a GaAs/AlGaAs distributed Bragg reflector, etching away the GaSb substrate, forming mesas with diameter ≈100 μm, depositing a G
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14

Gertner, E. R. "Liquid Phase Epitaxy of Hg1−xCdxTe from Te Solutions: A Route to IR Detector Structures." MRS Proceedings 90 (1986). http://dx.doi.org/10.1557/proc-90-357.

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The intrinsic semiconductor mercury cadmium telluride (Hg1−xCdxTe), a solid solution of HgTe and CdTe, has assumed an ever increasing role in the fabrication of infrared (IR) detectors because its energy gap (0-1.5 eV) can be tailored to match the specific needs of IR detection and fiber optic systems. In photovoltaic focal plane array (FPA) applications, low power consumption, as well as excellent sensitivity at elevated temperatures, have made Hg1−xCdxTe the material of choice for both the midwave IR (MWIR) and longwave IR (LWIR) region.
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15

Stanchu, Hryhorii, Grey Abernathy, Joshua Grant, et al. "Development of aspect ratio trapping growth of GeSn on Si for midwave infrared applications." Journal of Vacuum Science & Technology B 42, no. 4 (2024). http://dx.doi.org/10.1116/6.0003734.

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The development of all-group IV GeSn materials on Si substrates is of interest for monolithic midwave infrared (MWIR) silicon photonics. Despite their great potential, the growth of high crystalline quality materials is still challenging. The conventional growth of GeSn films on Si displays high densities of dislocations and, hence, large dark currents. We have examined a state-of-the-art lithographically defined aspect ratio trapping (ART) growth approach for threading dislocations (TDs) filtering in GeSn and demonstrated the selective growth in the holes embedded in the SiO2/Si(001) template
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16

Wang, Xiuxiu, Suofu Wang, Yanwei Wu, et al. "A Self‐Powered Photodetector Based on Graphene Enhanced WSe2/PtSe2 Heterodiode with Fast Speed and Broadband Response." Advanced Optical Materials, March 27, 2024. http://dx.doi.org/10.1002/adom.202400052.

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AbstractNarrow bandgap 2D layered material platinum selenide (PtSe2) with good environmental stability, high carrier mobility, and high light absorption, has been widely investigated for uncooled midwave‐infrared (MWIR) photodetection. However, the phototransistor based on the PtSe2 operation at room temperature suffered from the high dark current and background noise. Here, a graphene (G)‐enhanced G‐WSe2/PtSe2 hetero‐diode placed on a metal electrode is reported. To enhance the photogain, a graphene layer placed on the WSe2/PtSe2 heterodiode as a local gating layer is designed. The device exh
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