Results 91 to 100 of about 15,014 (299)
Advanced Science, EarlyView.Mid‐infrared photothermal imaging enables multidimensional profiling of micro‐ and nanoplastics in bottled water. A total of 9.9 × 104 particles L−1 is detected, with 64% in the nanoscale regime. Spectral evolution, including peak narrowing and band shifts, reveals local chain reorganization in polyethylene terephthalate (PET), highlighting intrinsic ...
Xinyu Deng +4 more
wiley +1 more source
Towards a compact THz local oscillator based on a quantum cascade laser
, 2010 Heterodyne spectroscopy of molecular rotational lines and atomic fine-structure lines is a powerful tool in astronomy and planetary research. One example is the OI fine-structure line at 4.7 THz.
Richter, Heiko +9 more
core
Imaging with a Terahertz quantum cascade laser
Optics Express, 2004 We demonstrate bio-medical imaging using a Terahertz quantum cascade laser. This new optoelectronic source of coherent Terahertz radiation allows building a compact imaging system with a large dynamic range and high spatial resolution. We obtain images of a rat brain section at 3.4 THz.
Juraj, Darmo +9 more
openaire +2 more sources
Advanced Science, EarlyView.A π‐conjugated donor–acceptor PDI monomer undergoes hydrogen‐bonded self‐assembly to form a robust mesoporous framework. The ordered molecular arrangement promotes efficient intersystem crossing and charge separation, leading to simultaneous Type I and Type II reactive oxygen species generation with a high singlet oxygen quantum yield.
Yi‐Lun Cheng +10 more
wiley +1 more source
High temperature, magnetic field assisted (sub)THz quantum cascade laser
, 2009 We demonstrate magnetic field assisted, (sub)THz quantum cascade laser operating above 200 K. This is achieved through the application of strong magnetic fields which provide an additional lateral confinement in order to suppress non-radiative ...
Fedorov, Georgy +13 more
core +1 more source
Cascade Type-I Quantum Well GaSb-Based Diode Lasers
Photonics, 2016 Cascade pumping of type-I quantum well gain sections was utilized to increase output power and efficiency of GaSb-based diode lasers operating in a spectral region from 1.9 to 3.3 μm.
Leon Shterengas +5 more
doaj +1 more source
Solid Ethanol as a Renewable, Low‐Toxicity, Electron‐Beam Direct Write, and Biomedical Material
Advanced Science, EarlyView.3D ice lithography (3DIL) enables the fabrication of intricate submicrometer objects using ethanol as a renewable starting material. This study combines process optimization, structural and material analysis, and biomedical applications, from cell culture scaffolds to the patterning of neurostimulation electrodes, demonstrating performance in both in ...
Bruno Perdigão +16 more
wiley +1 more source
Scientific Reports, 2017 Active control of the amplitude and frequency of terahertz sources is an essential prerequisite for exploiting a myriad of terahertz applications in imaging, spectroscopy, and communications.
S. J. Kindness +12 more
doaj +1 more source
Suppressed Auger Heating of Hot Carriers in Cu‐Doped Colloidal Quantum Wells
Advanced Science, EarlyView.ABSTRACT Auger heating represents a major bottleneck for hot carrier (HC) relaxation in colloidal quantum wells (CQWs), delaying carrier accumulation in band‐edge states and diminishing performance in light‐emitting applications. To address this issue, we introduce copper doping in CdSe CQWs to create midgap states, which efficiently suppresses Auger ...
Junhong Yu +6 more
wiley +1 more source
Dynamic conductivity of symmetric three-barrier plane nanosystem in constant electric field
Condensed Matter Physics, 2011 The theory of dynamic conductivity of nanosystem is developed within the model of rectangular potentials and different effective masses of electron in open three-barrier resonance-tunnel structure in a constant homogeneous electric field. The application
O. Voitsekhivska, M. Tkach, Ju. Seti
doaj +1 more source