Results 21 to 30 of about 5,232 (217)
Current Oncology, 2021 Duodenal obstruction is often accompanied with unresectable malignant distal biliary obstruction in patients who have undergone biliary self-expandable metal stent (SEMS) placement.
Chi-Huan Wu +6 more
doaj +1 more source
A Widely Tunable Three-Section DBR Lasers for Multi-Species Gas Detection
Applied Sciences, 2021 We demonstrate a widely tunable distributed Bragg reflector (DBR) laser operating at 1.8-µm, in which the DBR section was butt-jointed InGaAsP (λ = 1.45 μm) material. Through current and temperature tuning, a widely tuning range of over 11 nm with a side
Hongyan Yu +5 more
doaj +1 more source
Monolithically Integrated Tunable Three- Section All-Active DBR Laser Diodes With 30 nm Tuning Range
IEEE Photonics Journal, 2023 We present a monolithically integrated three-section all-active AlGaInAs/InP tunable distributed Bragg reflector (DBR) ridge waveguide laser diode that uses thermal tuning mechanism and mode-hopping tuning principle to achieve wide-range ...
Shaokang Chen +4 more
doaj +1 more source
Optical Tamm state theory study on asymmetric DBR-metal-DBR structure
Acta Physica Sinica, 2013 As a special metal surface state, optical Tamm state (OTS) has been widely used in designing the new generation of optical devices for its unique advantages in light control and operation. Based on distribute Bragg reflector (DBR)-metal-DBR (DMD)structure, asymmetric mechanism is introduced by mismatching central frequencies of the two DBRs to design ...
null Jiang Yao +2 more
openaire +1 more source
Nanomaterials, 2023 Quantum dots (QDs) laser has become an important way to solve micro-application problems in many fields. However, single wavelength distributed Bragg reflector (DBR) has many limitations in practical applications, such as signal transmission.
Xueqiong Su +9 more
doaj +1 more source
Optimal design of thermal emitter based on DBR cavity model in thermal photovoltaic technology
Results in Optics, 2022 To ensure the necessary technical support for the long-term operation of the space vehicle, this paper studies the optimization technology of thermal emitter design in thermophotovoltaic technology.
Tan Min +4 more
doaj +1 more source
Bio‐Inspired Synthesis of Macroporous Single Crystal Particles as Scattering Agents
Advanced Functional Materials, EarlyView.A general strategy is presented that delivers unique, single‐crystal microparticles that combine submicron macroporosity and uniform particle shapes. A bioinspired approach is used to occlude three distinct types of additives – polystyrene microspheres, polymer vesicles and amino acids – within calcite single crystals, and subsequent thermal annealing ...
Stephanie E. Foster +11 more
wiley +1 more source
Opportunities of Semiconducting Oxide Nanostructures as Advanced Luminescent Materials in Photonics
Advanced Materials, EarlyView.The review discusses the challenges of wide and ultrawide bandgap semiconducting oxides as a suitable material platform for photonics. They offer great versatility in terms of tuning microstructure, native defects, doping, anisotropy, and micro‐ and nano‐structuring. The review focuses on their light emission, light‐confinement in optical cavities, and
Ana Cremades +7 more
wiley +1 more source
Gestão & Produção, 2010 Recentes aplicações da Teoria das Restrições em Gestão de Operações têm adotado o chamado método Tambor-Pulmão-Corda Simplificado (S-DBR - Simplified Drum-Buffer-Rope) como padrão para planejamento e controle da produção.
Fernando Bernardi de Souza +1 more
doaj +1 more source
Directional Flow of Confined Polaritons in CrSBr
Advanced Materials, EarlyView.CrSBr, a layered magnetic semiconductor, naturally channels self‐hybridized excitonpolaritons into highly directional flow. Its intrinsic optical anisotropy, high refractive index, and strong lightmatter coupling enable long‐range guided modes along the a‐axis, with propagation lengths set by their excitonphoton admixture.
Pratap Chandra Adak +10 more
wiley +1 more source