Results 21 to 30 of about 11,732 (266)
Biosensors, 2022 Au nanoparticles were decorated on the surface of Co-doped ZnO with a certain ratio of Co2+/Co3+ to obtain a novel semiconductor-metal composite. The optimal substrate, designated as Co400-ZnO/Au, is beneficial to the promotion of separation efficiency ...
Yan Zhai +5 more
doaj +1 more source
Exploring Multistability in Semiconductor Ring Lasers: Theory and Experiment [PDF]
Physical Review Letters, 2009 We report the first experimental observation of multi-stable states in a single-longitudinal mode semiconductor ring laser. We show how the operation of the device can be steered to either monostable, bistable or multi-stable dynamical regimes in a controlled way.
Gelens, Lendert +6 more
openaire +5 more sources
Measurement of the emission spectrum of a semiconductor laser using laser-feedback interferometry
Scientific Reports, 2017 The effects of optical feedback (OF) in lasers have been observed since the early days of laser development. While OF can result in undesirable and unpredictable operation in laser systems, it can also cause measurable perturbations to the operating ...
James Keeley +11 more
doaj +1 more source
Pulsed exposure mode of the 445 nm semiconductor laser in phonosurgery: an experimental study
Biomedical Photonics, 2023 The study presents the results of an experimental study devoted to the choice of the most optimal mode of pulsed contact laser exposure of semiconductor laser with a wavelength of 445 nm in phonosurgery, which implies maximum preservation of anatomically
M. A. Ryabova +4 more
doaj +1 more source
The Surface Photogalvanic and Photon Drag Effects in Ag/Pd Metal-Semiconductor Nanocomposite
Nanomaterials, 2021 We performed the investigation of the polarization-sensitive photocurrent generated in silver-palladium metal-semiconductor nanocomposite films under irradiation with nanosecond laser pulses at the wavelength of 2600 nm.
Aleksandr S. Saushin +3 more
doaj +1 more source
Calibration Method for Industrial Robots Based on the Principle of Perigon Error Close
IEEE Access, 2022 For the problem that the self-error of industrial robot calibration device has influence on calibration accuracy, a calibration method of industrial robots based on the principle of Perigon Error Close is proposed.
Xirui Li +3 more
doaj +1 more source
Fast‐Responding O2 Gas Sensor Based on Luminescent Europium Metal‐Organic Frameworks (MOF‐76)
Advanced Functional Materials, EarlyView.Luminescent MOF‐76 materials based on Eu(III) and mixed Eu(III)/Y(III) show rapid and reversible changes in emission intensity in response to O2 with very short response times. The effect is based on triplet quenching of the linker ligands that act as photosensitizers. Average emission lifetimes of a few milliseconds turn out to be mostly unaffected by
Zhenyu Zhao +5 more
wiley +1 more source
Фізика і хімія твердого тіла, 2019 For the analysis of the measurement of thermoelectric parameters of semiconductors, the Harman pulsed method was used. The authors propose a new approach to determine the thermoelectric quality factor of thin semiconductor films in the temperature ...
Y. V. Tur, Y. V. Pavlovskyi, I. S. Virt
doaj +1 more source
Closed Loop Control of Melt Pool Width in Laser Directed Energy Deposition Process Based on PSO-LQR
IEEE Access, 2023 A closed-loop controller was proposed to adjust the laser power to maintain melt pool stability based on the linear quadratic regulator (LQR) control theory.
Liguo Miao, Fei Xing, Yuanxin Chai
doaj +1 more source
Backbone Heterojunction Photocatalysts for Efficient Sacrificial Hydrogen Production
Advanced Functional Materials, EarlyView.Herein, a ‘single‐component’ organic semiconductor photocatalyst is presented in which a molecular donor is bonded to a polymer acceptor. The resultant material demonstrates exceptional photocatalytic activity for hydrogen evolution in aqueous triethylamine with an outstanding external quantum efficiency of 38% at 420 nm.
Richard J. Lyons +11 more
wiley +1 more source