Results 101 to 110 of about 4,020,412 (320)

Generalized Eaton Lens at Arbitrary Refraction Angles [PDF]

arXiv, 2011
We extended the refraction angle of the Eaton lens into arbitrary angles. The refractive index of the Eaton lens is not analytical and can be obtained by numerical calculations only except in the case of the retroreflector. We introduced an approximation for the refractive index of the generalized Eaton lens.
arxiv  

Measuring the Refractive Index of Highly Crystalline Monolayer MoS2 with High Confidence

Scientific Reports, 2015
Monolayer molybdenum disulphide (MoS2) has attracted much attention, due to its attractive properties, such as two-dimensional properties, direct bandgap, valley-selective circular dichroism and valley Hall effect.
Hui Zhang, Yaoguang Ma, Y. Wan, X. Rong, Ziang Xie, Wei Wang, L. Dai   +6 more
semanticscholar   +1 more source

A Gym for Cells—Direct Laser Writing of Magnetic Multilayered Micro Actuators for Mechanical Stimulation of Cells

Advanced Functional Materials, EarlyView.
Surface‐attached multilayer micromagnet systems are fabricated by two‐photon crosslinking. The pillar‐shaped micro actuators consist of a soft and flexible surface‐attached cell‐repellent hydrogel layer at the bottom, acting as a hinge and a cell‐adhesive hydrophobic polymer filled with magnetic nanoparticles.
Nicolas Geid, Ayman Husari, Eleonora Galli, Lukas Leffler, Pascal Tomakidi, Jürgen Rühe   +5 more
wiley   +1 more source

Wavelength dependence of the refractive index of human colorectal tissues: comparison between healthy mucosa and cancer

Journal of Biomedical Photonics & Engineering, 2016
Biological tissues have individual optical properties that may be used as an identity card. The refractive index in particular, which can be measured directly, is very significant for the improvement or development of optical technologies in clinical ...
Sónia Carvalho, Nuno Gueiral, Elisabete Nogueira, Rui Henrique, Luís Oliveira, Valery V. Tuchin   +5 more
doaj   +1 more source

Enhanced Terahertz Spectroscopy of a Monolayer Transition Metal Dichalcogenide

Advanced Functional Materials, EarlyView.
An ad‐hoc engineered metallic surface is employed to perform enhanced terahertz spectroscopy of a monolayer transition metal dichalcogenide (TMD). Thanks to a local absorption boost of 104, this technique allows for the extraction of the phonon resonance features and effective permittivity of the 2D material, paving the way for the rational design of ...
Xin Jin, Vincenzo Aglieri, Young‐Gyun Jeong, Atiye Pezeshki, Lilian Skokan, Mostafa Shagar, Yuechen Jia, Pablo Bianucci, Andreas Ruediger, Emanuele Orgiu, Andrea Toma, Luca Razzari   +11 more
wiley   +1 more source

Numerical investigation into a surface plasmon resonance sensor based on optical fiber microring

Photonic Sensors, 2017
A reflective surface plasmon resonance (SPR) sensor based on optical fiber microring is proposed. In such a sensor, plasmons on the outer surface of the metallized channels containing analyte can be excited by a fundamental mode of a thin-core fiber (TCF)
Chunliu Zhao, Yanru Wang, Dongning Wang, Zhewen Ding   +3 more
doaj   +1 more source

Optical Hydrogen Sensing Materials for Applications at Sub‐Zero Temperatures

Advanced Functional Materials, EarlyView.
This study demonstrates the viability of optical hydrogen sensors at temperatures as low as −60°C. Using advanced metal hydride materials, the sensors detect hydrogen with high sensitivity, speed, and stability across a wide range of concentrations. These findings open doors for safe hydrogen detection in extreme cold, enabling applications in aviation,
Ziqing Yuan, Herman Schreuders, Robert Dankelman, Bernard Dam, Lars J. Bannenberg   +4 more
wiley   +1 more source

Some Advanced Fiber-Optical Amplitude Modulated Reflection Displacement and Refractive Index Sensors

Nonlinear Analysis, 2007
Some advanced fiber-optic amplitude modulated reflection displacement sensors and refractive index sensors have been developed. An improved three-fiber displacement sensor has been investigated as a refractive index sensor by computer simulations in a ...
V. Kleiza, J. Verkelis
doaj   +1 more source

The Determination of Poisson's Ratio and of the Absolute Stress-variation of Refractive Index [PDF]

, 1921
F. Twyman, John Perry
openalex   +1 more source

Vivid Structural Coloration in Transparent MXene‐Cellulose Nanocrystals Composite Films

Advanced Functional Materials, EarlyView.
Vivid structural coloration in reflectance and high transparency in transmittance modes are observed in biopolymer‐layered composite films. The ultrathin multilayered structures have unique optical appearance, near‐infrared bandgap, and strong optical reflection caused by alternating MXene and cellulose nanocrystals layers with high refractive index ...
Botyo Dimitrov, Valeriia Poliukhova, Claire Joo, Madeline Buxton, Irina Roslyk, Yury Gogotsi, Jacob Crossno, Kirt A. Page, Hilmar Koerner, Dhriti Nepal, Michael E. McConney, Timothy J. Bunning, Vladimir V. Tsukruk   +12 more
wiley   +1 more source