Results 51 to 60 of about 5,232 (217)
Limnology and Oceanography: Methods, EarlyView.Abstract Tailwaters are ubiquitous and highly managed ecosystems whose food webs often rely disproportionately on autochthonous energy. In situ continuous dissolved oxygen data are increasingly being used to estimate gross primary productivity and ecosystem respiration in rivers, but this approach is complicated in tailwaters, where upriver ...
Ian W. Bishop +5 more
wiley +1 more source
Quantization of Polaritons Confined in Dielectric Structures
Laser &Photonics Reviews, EarlyView.This study addresses the limitations of the Hopfield model of strong light‐matter coupling in the case of structured dieletrics. A method to derive quantum models in the polariton basis using Bogoliubov transformation and third quantization is introduced, demonstrating how to boost interaction strength and engineer nonlocal interactions for strongly ...
Amir Rahmani +4 more
wiley +1 more source
The Design-based research: overview and contributions to science education
Investigações em Ensino de Ciências, 2017 The Design-Based Research (DBR) involves a new interventionist methodology that seeks to combine theoretical aspects of educational research to educational practice.
Fabiana Botelho Kneubil +1 more
doaj +1 more source
The DBR Methodology for the Study of Context in Learning [PDF]
, 2017 In the Design-Based Research (DBR) methodology, the process is as important as the product, and each iteration is considered a sub-result leading to the next one. This methodology is being used in the TEEC project, to both study and elaborate solutions for Learning in Context.
openaire +2 more sources
Optical properties of DBR-lasers.
The Review of Laser Engineering, 1989 We have fabricated the InGaAsP/InP DBR-lasers with the wavelength range of 1.5μm, and investigated their optoelectronic properties. High sub-mode suppression ratios of exceeding 35 dB, and very narrow spectral linewidths less than 10 MHz were obtained. Wavelengthtuning was performed by an injection of tuning current in Bragg reflector region.
TAKAHASHI, Mitsuo +5 more
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, 2023 Vertical cavity surface emitting lasers (VCSEL) are of great interest for photonic and telecom applications, however challenges in fabrication of efficient VSCEL GaN devices are yet to be resolved. In this work we present a study of micro-photoluminescence (PL) emission from a novel InGaN quantum well (QW) emitting structure with integrated micro ...
Andrei Sarua +3 more
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Laser &Photonics Reviews, EarlyView.Epitaxial growth forms III–V membranes directly atop the silicon waveguide layer on SOI, while in‐plane in situ doping defines lateral p–i–n InP/InGaAs junctions in a single growth step. The membrane photodetectors achieve 50 Gb/s NRZ‐OOK operation.
Zhao Yan +10 more
wiley +1 more source
NanomaterialsThe utilization of a nanoporous (NP) GaN fabricated by electrochemical etching has been demonstrated to be effective in the fabrication of a high-performance ultraviolet (UV) photodetector (PD).
Junjie Wen +6 more
doaj +1 more source
Laser &Photonics Reviews, EarlyView.Room‐temperature lower‐polariton‐like lasing is realized in an InGaN/GaN thin‐film ridge cavity with lateral distributed Bragg reflectors. Near‐field optical microscopy distinguishes the transverse side‐DBR‐confined mode from a longitudinal photon‐like mode, while simulations reproduce their spatial profiles.
Wai Yuen Fu +2 more
wiley +1 more source
Engineering Photonic Pigments From Titania–Block Copolymer Composites
Macromolecular Rapid Communications, EarlyView.Ligand‐functionalized TiO2 nanoparticles selectively partition into P2VP‐rich lamellae of onion‐like PS‐b‐P2VP microspheres, increasing refractive index contrast while preserving concentric order through controlled self‐assembly. The resulting dry photonic pigments display defined Bragg reflections and angle‐robust structural color.
Niklas Rocca Schwarz +5 more
wiley +1 more source