Investigation of Passivation Pretreatment Processes for Mid‐/Long‐Wavelength Dual‐Band Infrared Focal Plane Arrays Based on Type‐II InAs/GaSb Superlattices
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DOI: 10.1002/adem.202302061
Abstract: Herein, through the analysis of devices with different passivation pretreatment processes, it is found that after surface corrosion, the optimized process of O3 treatment combined with hydrochloric acid and H3PO4/C6H8O7/H2O2/H2O treatments can significantly improve the… read more here.
Keywords: wavelength dual; long wavelength; passivation pretreatment; wavelength ... See more keywords
Pushing PbS/Metal‐Halide‐Perovskite Core/Epitaxial‐Ligand‐Shell Nanocrystal Photodetectors beyond 3 µm Wavelength
Sign Up to like & getrecommendations! Published in 2019 at "Advanced Functional Materials"
DOI: 10.1002/adfm.201807964
Abstract: PbS nanocrystals have been proven to be highly suitable for photodetector fabrication by facile solution processing, and have been successfully tested as photosensitive material in imaging devices. So far, their spectral response has been blue‐shifted… read more here.
Keywords: metal halide; halide perovskite; wavelength; ligand shell ... See more keywords
Wavelength‐Controlled Photocurrent Polarity Switching in BP‐MoS 2 Heterostructure
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DOI: 10.1002/adfm.202112696
Abstract: Layered two-dimensional van der Waals (vdW) semiconductors and their heterostructures have been shown to exhibit positive photoconductance (PPC) in many studies. A few recent reports have demonstrated negative photoconductance (NPC) as well that can enable… read more here.
Keywords: npc ppc; wavelength controlled; reversible switching; wavelength ... See more keywords
Linear Dichroism Conversion in Quasi-1D Perovskite Chalcogenide.
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DOI: 10.1002/adma.201902118
Abstract: Anisotropic photonic materials with linear dichroism are crucial components in many sensing, imaging, and communication applications. Such materials play an important role as polarizers, filters, and waveplates in photonic devices and circuits. Conventional crystalline materials… read more here.
Keywords: dichroism; linear dichroism; dichroism conversion; perovskite chalcogenide ... See more keywords
Accurate Wavelength Tracking by Exciton Spin Mixing
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DOI: 10.1002/adma.202205015
Abstract: Wavelength‐discriminating systems typically consist of heavy benchtop‐based instruments, comprising diffractive optics, moving parts, and adjacent detectors. For simple wavelength measurements, such as lab‐on‐chip light source calibration or laser wavelength tracking, which do not require polychromatic… read more here.
Keywords: accurate wavelength; tracking exciton; wavelength tracking; spin mixing ... See more keywords
Highly Efficient Wavelength Red‐Shift Regulating Strategy of Carbon Dots Composites via the Effective Conjugated Domain and the Hydrogen Bonding Synergy
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DOI: 10.1002/adma.202418335
Abstract: Room‐temperature phosphorescent (RTP) materials hold significant potential for applications in lighting, anti‐counterfeiting, and multi‐level information encryption. However, regulating RTP emission wavelengths, especially shifting into the red spectral region, remains challenging due to the spin‐forbidden transitions… read more here.
Keywords: carbon dots; hydrogen bonding; wavelength; conjugated domain ... See more keywords
Nonlocal Metasurface Lens for Long‐Wavelength Infrared Radiation
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DOI: 10.1002/adma.202507848
Abstract: Dielectric metasurfaces are structured thin films with a thickness smaller than the operating wavelength aiming at replacing and enhancing conventional bulk optical components. At visible and near‐infrared frequencies, titania or silicon is routinely used as… read more here.
Keywords: metasurface lens; long wavelength; wavelength; lens long ... See more keywords
Nonlocal Metasurface Lens for Long‐Wavelength Infrared Radiation (Adv. Mater. 43/2025)
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DOI: 10.1002/adma.70849
Abstract: The image illustrates the demonstration of an ultra-thin nonlocal metalens operating in the long-wavelength infrared range, reported in Research Article (DOI: 10.1002/ adma.202507848) by Andrea Alù and co-workers, representing the first realization of flat optics… read more here.
Keywords: metasurface lens; optics; long wavelength; wavelength infrared ... See more keywords
Generating Focused 3D Perfect Vortex Beams By Plasmonic Metasurfaces
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DOI: 10.1002/adom.201701228
Abstract: DOI: 10.1002/adom.201701228 from the Fourier transformation of the Bessel–Gauss (BG) beam,[13,14] by utilizing a series of free-space bulky optical components including axicon, spiral phase plate, Fourier transform lens, and spatial light modulator. This fact greatly… read more here.
Keywords: optical components; phase; bulky optical; plasmonic metasurfaces ... See more keywords
Site Preference Induced Dual‐Wavelength Mn2+ Upconversion in K2NaScF6:Yb3+, Mn2+ and Its Application in Temperature Sensing
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DOI: 10.1002/adom.202302819
Abstract: The realization of dual‐wavelength Mn2+ upconversion (UC) luminescence that exhibits different thermal responsive behaviors is promising for non‐invasive optical temperature sensing applications. However, it remains challenging to achieve such luminescence of Mn2+ ions. Herein, due… read more here.
Keywords: yb3 mn2; mn2; luminescence; dual wavelength ... See more keywords
Dual‐Wavelength Controllable and Exciplex Emission for Laser Concealment
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DOI: 10.1002/adom.202401489
Abstract: As an advanced signal source, laser is very suitable for various photonic devices but implementing tunability of wavelength is more challenging. Herein, the study designs and synthesizes boron difluoride derivative tBuBF2, systematically studying the impact… read more here.
Keywords: emission laser; laser concealment; exciplex emission; dual wavelength ... See more keywords