Results 101 to 110 of about 45,769 (300)

Multimodal Imaging of Strain and Light Emission of Core–Shell InGaN/GaN Wires under a Sub‐Micrometer Polychromatic X‐Ray Probe

Advanced Materials Interfaces, EarlyView.
Micro‐Laue diffraction and excited optical X‐ray luminescence are used to study InGaN/GaN core‐shell wires on the BM32 beamline at the European Synchrotron. Multimodal imaging of X‐ray fluorescence, deviatoric strain tensors and optical emissions is performed using simultaneous mapping.
Beatriz de Goes Foschiani, Sergio Bongiorno, Odile Robach, Olivier Ulrich, Jean‐Sébastien Micha, Joël Eymery   +5 more
wiley   +1 more source

Novel Fabrication Technique of Superimposed LPG with Different Grating Pitches for the Simultaneous Detection of Refractive Index and Temperature

Proceedings, 2019
Optical fiber sensors based on in-fiber Long Period Gratings (LPG) have attracted considerableinterest in the context of environmental, chemical and biochemical sensing. [...]
Cosimo Trono, Federico Valeri, Francesco Baldini   +2 more
doaj   +1 more source

Defect grating modes as superimposed grating states [PDF]

, 2003
For a symmetric grating structure with a defect, we show that a fully transmitted defect mode in the band gap can be obtained as a superposition of two steady states: an amplified and an attenuated defect state.
Andonowati,, Groesen, E. van, Sopaheluwakan, A.   +2 more
core   +1 more source

Fabrication of strong long-period gratings in hydrogen-free fibers with 157-nm F2-laser radiation [PDF]

, 2001
Long-period gratings were fabricated in standard telecommunication fiber (Corning SMF-28) by use of what is believed to be record short-wavelength light from a 157-nm F2 laser.
Chen, KP, Herman, PR, Tam, R, Zhang, J
core   +1 more source

Widely tunable long-period fibre gratings

Electronics Letters, 1999
The authors report the realisation of a new type of long-period fibre grating with an enhanced temperature sensitivity of 8O nm/100/spl deg/C by the use of specially-designed fibre structures incorporating polymers. These new gratings should enable broadly tunable filters for communications systems.
A.A. Abramov, A. Hale, R.S. Windeler, T.A. Strasser   +3 more
openaire   +1 more source

Programmable Dimensional Lithography with Digital Micromirror Devices for Multifunctional Microarchitectures

Advanced Materials Technologies, EarlyView.
This review explores recent advances in digital micromirror device (DMD)‐based lithography, focusing on its programmable light modulation, multi‐material compatibility, and dimensional patterning strategies. It highlights innovations from optical system design to materials integration and multifunctional applications, positioning DMD lithography as a ...
Yubin Lee, Byungcheon Yoo, Chaeyeong Ryu, Jongwon Oh, Dahye Baek, Jiseok Lee   +5 more
wiley   +1 more source

Propagation Characteristics of Optical Long Period Fiber Gratings using Graphical Solution Methods

Journal of Microwaves, Optoelectronics and Electromagnetic Applications
In this paper, we explicitly show a complete analysis and detailed calculation of propagation characteristics of the effective refractive indices of the core and cladding for a long period grating employing both the Two-Layer and Three-Layer Geometries ...
Felipe S. Delgado, Marco A. Jucá, Thiago V. N. Coelho, Alexandre B dos Santos, Andres P. L. Barbero, Vinicius N. H. Silva   +5 more
doaj   +1 more source

Spatio-temporal coherent control of thermal excitations in solids

, 2017
X-ray reflectivity (XRR) measurements of femtosecond laser-induced transient gratings are applied to demonstrate the spatio-temporal coherent control of thermally induced surface deformations on ultrafast timescales.
Bargheer, Matias, Besse, Valentin, Gaal, Peter, Herzog, Marc, Newby, Gemma, Pedersen, Martin, Pudell, Jan-Etienne, Sander, Mathias, Schwarzkopf, Jutta, Sellmann, Jan, Temnov, Vasily, Weinkauf, Norbert   +11 more
core   +1 more source

End‐to‐End Sensing Systems for Breast Cancer: From Wearables for Early Detection to Lab‐Based Diagnosis Chips

Advanced Materials Technologies, EarlyView.
This review explores advances in wearable and lab‐on‐chip technologies for breast cancer detection. Covering tactile, thermal, ultrasound, microwave, electrical impedance tomography, electrochemical, microelectromechanical, and optical systems, it highlights innovations in flexible electronics, nanomaterials, and machine learning.
Neshika Wijewardhane, Lyn I. Jones, Richard M. Martin, Helen Winter, Faezeh Arab Hassani   +4 more
wiley   +1 more source

Reconfigurable Microwave Photonic Filter Based on Long Period Gratings Inscribed in Multicore Fibers

IEEE Photonics Journal, 2019
We propose and experimentally demonstrate a reconfigurable finite impulse response microwave photonic filter (FIR-MPF) based on long period gratings (LPGs) inscribed in multicore fibers.
Liang Huo, Lin Gan, Li Shen, Ming Tang, Songnian Fu, Weijun Tong   +5 more
doaj   +1 more source