Results 71 to 80 of about 1,764,069 (315)

Manufacturing and Spectral Features of Different Types of Long Period Fiber Gratings: Phase-Shifted, Turn-Around Point, Internally Tilted, and Pseudo-Random

open access: yesFibers, 2017
The manufacturing and spectral features of different types of long period fiber gratings (LPFGs), ranging from phase-shifted, turn-around point, and internally tilted gratings, to pseudo-random gratings, are described and discussed in detail.
Francesco Chiavaioli   +2 more
doaj   +1 more source

Laser Cleaning Applications for Religious Objects [PDF]

open access: yes, 2005
Laser clearing is nowadays employed successfully for the removal of unwanted layers of diverse chemical and physical nature from historical and religious monuments and objects.
Theodorakopoulos, Charis   +1 more
core  

Carbon steel wettability characteristics enhancement for improved enamelling using a 1.2 kW high power diode laser [PDF]

open access: yes, 2000
High-power diode laser (HPDL) surface treatment of a common engineering carbon steel(EN8) was found to effect significant changes to the wettability characteristics of the metal.
Agarwala   +25 more
core   +1 more source

State‐of‐the‐Art Solar Blind and X‐Ray Photodetectors Based on Gallium Oxide

open access: yesAdvanced Photonics Research, EarlyView.
State‐of‐the‐art Ga2O3‐based solar‐blind UV and X‐ray photodetectors (PDs) are reviewed. Benchmark plots compare responsivity versus specific detectivity for UV PDs (photoconductors, photovoltaic, Schottky, heterojunction, avalanche, and phototransistor types) and sensitivity versus response time for X‐ray detectors based on Ga2O3 bulk crystals, thin ...
Catherine Langpoklakpam   +7 more
wiley   +1 more source

Quantitative Control of Oxygen Non‐Stoichiometry and Negative Raman Chemical Shift During Topotactic Phase Transition in a Ca‐Doped BiFeO3 Thin‐Film

open access: yesAdvanced Science, EarlyView.
In an electrochemical titration cell utilizing a Ca‐doped BiFeO3 film, the oxygen stoichiometry was quantitatively controlled via electrical oxygen pumping. The structural and chemical changes were monitored through Raman spectroscopy and X‐ray diffraction.
Heung‐Sik Park   +7 more
wiley   +1 more source

A laser-based technique for the coating of mild steel with a vitreous enamel [PDF]

open access: yes, 2001
Marked changes in the wettability characteristics of EN8 mild steel were observed after high power diode laser (HPDL) surface treatment of the metal.
Lawrence, Jonathan, Li, Lin
core   +1 more source

Controllable Preparation of Millimeter‐Scale In‐Plane Charged Domain Wall in a Lead‐Free Ferroelectric Film

open access: yesAdvanced Science, EarlyView.
This study presents an effective method for fabricating millimeter‐scale continuous in‐plane head‐to‐head charged domain walls by controlling the growth of the Na0.5Bi0.5TiO3 film. The formation of antiphase boundaries plays a crucial role in stabilizing the charged domain walls. Atomic‐scale insights reveal that the dynamic coupling among polarization,
Fang Liu   +7 more
wiley   +1 more source

Noise in Passively Mode-Locked Lasers [PDF]

open access: yes, 1998
For the first time, phase fluctuations in the spectral intensity of the pulse train generated by passively mode-locked semiconductor lasers have been measured. The results reveal diffusion-like fluctuations of this phase.
Eliyahu, D., Yariv, A.
core   +1 more source

Determination of the Kinetic Rates and Intrinsic Nonradiative Losses in Organic Thermally Activated Delayed Fluorescence Emitters

open access: yesAdvanced Science, EarlyView.
It is demonstrated that the kinetic rates and intrinsic nonradiative losses of purely organic emitters with thermally activated delayed fluorescence cannot be precisely determined by photoluminescent measurements alone. With device modeling, it is then possible to quantify the absolute nonradiative losses from singlets and triplets, and therefore the ...
Xin Zhou   +5 more
wiley   +1 more source

Laser pulse shape dependence of poly-Si crystallization

open access: yesAIP Advances, 2017
Poly-Si crystallization mechanism is examined by conducting numerical simulations, combining the thermal diffusion equation with a rigorous coupled wave analysis method.
Oleg N. Prudnikov   +2 more
doaj   +1 more source

Home - About - Disclaimer - Privacy