Results 71 to 80 of about 3,452 (196)

Portable tunable interband cascade laser spectrometer using thin-film waveguides for food contaminant analysis

open access: yesAIP Advances
Interband cascade lasers (ICL) are high output power mid-infrared light sources with low power consumption, serving as a viable alternative to more commonly applied quantum cascade lasers.
A. Femenias   +13 more
doaj   +1 more source

Multivariate Analysis of Photoacoustic Spectra for the Detection of Short-Chained Hydrocarbon Isotopologues

open access: yesMolecules, 2020
We report, to our knowledge, the first optical detection scheme for short-chained hydrocarbon isotopologues. The sensor system is based on photoacoustic spectroscopy (PAS).
Alain Loh, Marcus Wolff
doaj   +1 more source

Double Helical Plasmonic Antennas

open access: yesAdvanced Functional Materials, Volume 36, Issue 20, 9 March 2026.
Plasmonic double helical antennas funnel circularly polarized light to the nanoscale, offering strong chiroptical interaction and directional light emission. Extending a single helix design tool, this study combines numerical modeling with experimental validation, revealing large, broadband dissymmetry factors in the visible range.
Aleksei Tsarapkin   +7 more
wiley   +1 more source

Interband Cascade Lasers from a Historic Perspective to a Future Outlook

open access: yesPhotonics
Efficient, reliable, and low-cost mid-infrared interband cascade lasers (ICLs) are needed to meet the growing demands of many useful applications such as chemical sensing, environmental and greenhouse gas monitoring, detection of pipe leaks and ...
Rui Q. Yang, Michael B. Santos
doaj   +1 more source

Towards unstrained interband cascade lasers

open access: yesApplied Physics Express, 2017
We propose designs for the active region of an interband cascade laser by utilizing a combination of In(As,Sb) and (Ga,In)(As,Sb) materials in a type-II system for strain control and to eventually make the entire quantum well lattice-matched to GaSb or InAs substrates.
Ryczko, Krzysztof, Sęk, Grzegorz
openaire   +1 more source

Simulation of Transport and Gain in Quantum Cascade Lasers

open access: yes, 2003
Quantum cascade lasers can be modeled within a hierarchy of different approaches: Standard rate equations for the electron densities in the levels, semiclassical Boltzmann equation for the microscopic distribution functions, and quantum kinetics ...
Lee, S. -C.   +2 more
core   +2 more sources

Electron–Matter Interactions During Electron Beam Nanopatterning

open access: yesAdvanced Functional Materials, Volume 36, Issue 21, 12 March 2026.
This article reviews the electron–matter interactions important to nanopatterning with electron beam lithography (EBL). Electron–matter interactions, including secondary electron generation routes, polymer radiolysis, and electron beam induced charging, are discussed.
Camila Faccini de Lima   +2 more
wiley   +1 more source

Mid‐Infrared Integrated Photonics: Material Platforms and Emerging Applications

open access: yesLaser &Photonics Reviews, Volume 20, Issue 6, 18 March 2026.
Mid‐infrared (MIR) integrated photonics enables advanced chemical and biological sensing through the unique absorption features of molecules in the 2–20 µm range. This review highlights recent material advances such as chalcogenide glasses, silicon, and graphene and explores MIR applications in environmental monitoring, medical diagnostics ...
Muhammad Ali Butt   +2 more
wiley   +1 more source

Microscopic approach for intersubband-based thermophotovoltaic structures in the terahertz and mid-infrared [PDF]

open access: yes, 2011
This paper describes microscopic calculations of photocurrent generation spectra due to intersubband transitions in semiconductor heterostructures that can extract energy from photons in the THz and Mid Infrared Ranges.
Pereira, Mauro
core   +1 more source

NIR‐Triggered Upconversion‐Perovskite Heterostructures for Non‐Genetic, Implant‐Free Optoelectronic Neuromodulation

open access: yesAdvanced Science, Volume 13, Issue 8, 9 February 2026.
The Single‐Nanostructured Optoelectronic Vehicle for neuromodulation Activation (SNOVA) establishes a paradigm for non‐genetic, implant‐free neuromodulation. By integrating NIR‐excitable UCNPs with broadband‐absorbing perovskite QDs, SNOVA efficiently converts deeply penetrating light into localized electric fields that modulate neuronal ion dynamics ...
Luyue Jiang   +19 more
wiley   +1 more source

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