Multispectral and polarimetric imaging in the LWIR: Intersubband detectors as a versatile solution

Nedelcu, Alexandru; Guériaux, Vincent; Berurier, Arnaud; l'Isle, N. Brière de; Huet, O.

doi:10.1016/j.infrared.2012.12.026

Cited by 13 publications

(4 citation statements)

References 29 publications

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“…For instance, according to the diffraction limit theory proposed by Ernest Abbe and Lord Rayleigh in 1873 and 1879, a higher resolution of microscope and telescope requires either the reduction of operational wavelength or the increase of aperture size. For many specific objects such as molecules and star dust, the smallest operational wavelength is limited by the absorption/scattering process, thus a larger aperture becomes the only possible choice (for ground-based telescope, adaptive optics is required to eliminate the influence of atmosphere turbulence). , However, the increase in telescope aperture requires much higher cost and longer manufacturing time for both ground-based and space-based telescopes. In microscopes and lithographic systems, the highest numerical aperture is ultimately limited by the immersion materials and hardly to be further improved beyond 1.4.…”

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confidence: 99%

Engineering Optics 2.0: A Revolution in Optical Materials, Devices, and Systems

Luo

2018

ACS Photonics

102

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Along with the rapid development of micro/nanofabrication and characterization techniques, as well as the advancement of electronic computer and numerical simulation algorithms, modern engineering optics has entered a new phase termed Engineering Optics 2.0 (EO 2.0), which breaks the fundamental limitations of classic optical laws with respect to many aspects of optics (including reflection, refraction, diffraction, absorption and radiation, etc.). These theoretical breakthroughs may provide a new scheme for engineering optical applications. In this perspective, on the basis of anomalous optical and electromagnetic phenomena discovered in ordered subwavelength structures, we analyzed the opportunities and main challenges toward practical applications. Rather than replacing traditional optical components, we argue that subwavelength structured materials should be merged with the state-of-art technologies to make EO 2.0 more competitive in both miniature and large optical systems.

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confidence: 99%

Engineering Optics 2.0: A Revolution in Optical Materials, Devices, and Systems

Luo

2018

ACS Photonics

102

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“…In visible range of the spectrum the extinction ratio of micro-polarizers has reached ~60 6 . In infrared (IR) range, however, the extinction ratio is only 2.3 for IR detectors 7 (expressed as contrast ratio (diattenuation) = (Rx-Ry)/(Rx+Ry) > 40% in the referenced paper), and will saturate to only about 10 (responsivity contrast ~82%) even when the pixel size is enlarged to 100 μm 8 . The reason might be attributed to the cross-talks between neighbor pixels or the wave-leakage through pixel edges that contaminates the polarization as for imaging FPAs the detecting pixel is completely exposed within the light beam and the longer wavelength in IR range will make the cross-talk/wave-leakage much easier.…”

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confidence: 99%

High-Polarization-Discriminating Infrared Detection Using a Single Quantum Well Sandwiched in Plasmonic Micro-Cavity

et al. 2014

Sci Rep

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Polarimetric imaging has proved its value in medical diagnostics, bionics, remote sensing, astronomy, and in many other wide fields. Pixel-level solid monolithically integrated polarimetric imaging photo-detectors are the trend for infrared polarimetric imaging devices. For better polarimetric imaging performance the high polarization discriminating detectors are very much critical. Here we demonstrate the high infrared light polarization resolving capabilities of a quantum well (QW) detector in hybrid structure of single QW and plasmonic micro-cavity that uses QW as an active structure in the near field regime of plasmonic effect enhanced cavity, in which the photoelectric conversion in such a plasmonic micro-cavity has been realized. The detector's extinction ratio reaches 65 at the wavelength of 14.7 μm, about 6 times enhanced in such a type of pixel-level polarization long wave infrared photodetectors. The enhancement mechanism is attributed to artificial plasmonic modulation on optical propagation and distribution in the plasmonic micro-cavities.

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“…Targets under tree cover received relatively diffuse illumination and exhibited considerably weaker polarisation. Thales have also explored the feasibility of developing a tri-spectral polarimetric QWIP array to enhance the location of sites harbouring potential IEDs [20].…”

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confidence: 99%

Systems for persistent surveillance

Lewis

2011

SPIE Proceedings

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The requirements for a persistent wide-area surveillance system are discussed in the context of evolving military operations. Significant emphasis has been placed on the development of new sensing technologies to meet the challenges posed by asymmetric threats. Within the UK, the Electro-Magnetic Remote Sensing Defence Technology Centre (EMRS DTC) has supported the research and development of new capabilities including radio-frequency (RF) and electro-optic (EO) systems, as well as work on sensor exploitation, with a goal of developing solutions for enhancing situational awareness. This activity has been supported by field trials to determine the efficacy of competing technologies in relation to realistic threat scenarios.

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Multispectral and polarimetric imaging in the LWIR: Intersubband detectors as a versatile solution

Cited by 13 publications

References 29 publications

Engineering Optics 2.0: A Revolution in Optical Materials, Devices, and Systems

Engineering Optics 2.0: A Revolution in Optical Materials, Devices, and Systems

High-Polarization-Discriminating Infrared Detection Using a Single Quantum Well Sandwiched in Plasmonic Micro-Cavity

Systems for persistent surveillance

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