Results 51 to 60 of about 4,049 (195)

Harmonic holography: a new holographic principle

Applied Optics, 2007
The process of second harmonic generation (SHG) has a unique property of forming a sharp optical contrast between noncentrosymmetric crystalline materials and other types of material, which is a highly valuable asset for contrast microscopy. The coherent signal obtained through SHG also allows for the recording of holograms at high spatial and temporal
Pu, Ye, Centurion, Martin, Psaltis, Demetri   +2 more
openaire   +4 more sources

Recent Advances on Thermochromic Inks for Security Applications

Advanced Materials Technologies, EarlyView.
Thermochromic security inks have garnered interest in recent years as security elements for authentication, information encryption, and anti‐counterfeiting. This review outlines different types of thermochromic materials, how they have been developed as functional inks, and how advancements in property enhancement, sustainability, and printing ...
Duarte B. Oliveira, Andreia Araújo, Elvira Fortunato, Rodrigo Martins, Marta C. Corvo, Emanuel Carlos   +5 more
wiley   +1 more source

Total internal reflection coupling module for generating zero-order-free holographic optical fields [PDF]

APL Photonics
The liquid crystal spatial light modulator (LC-SLM) is a widely utilized device for optical field modulation. However, it is commonly plagued by the significant zero-order beam in the output diffraction pattern.
Wenyu Gao, Yuan Zhou, Xing Li, Yanan Zhang, Chen Bai, Xianghua Yu, Jun Qu, Qiang Zhang, Manman Li, Shaohui Yan, Xiaohao Xu, Baoli Yao   +11 more
doaj   +1 more source

Dynamical analysis and statefinder of Barrow holographic dark energy

European Physical Journal C: Particles and Fields, 2021
Based on the holographic principle and the Barrow entropy, Barrow holographic dark energy had been proposed. In order to analyze the stability and the evolution of Barrow holographic dark energy, we, in this paper, apply the dynamical analysis and ...
Qihong Huang, He Huang, Bing Xu, Feiquan Tu, Jun Chen   +4 more
doaj   +1 more source

Engineered Optical Fibers for Deep‐Tissue Applications

Advanced Optical Materials, EarlyView.
This review establishes a foundational framework for designing optical fibers for deep‐tissue medicine. It systematically links material innovations like polymers and hydrogels with structural paradigms to enable state‐of‐the‐art diagnostics, including endoscopy and biosensing, and targeted therapeutics, guiding future clinical translation.
Yuzhen Li, Siyang Zheng, Wenzhao Li, Kai Chen, Tianting Zhong, Chi Man Woo, Weiran Pang, Chuqi Yuan, Xiaozhou Xiao, Xianguang Yang, Long Jin, Xiang Qian, Qiyao Tan, Changyuan Yu, Liwei Liu, Junle Qu, Puxiang Lai   +16 more
wiley   +1 more source

The weak equivalence principle and the Dirac constant: A result from the holographic principle

Results in Physics
In this article, based on a recent formularization of the holographic principle proposed and investigated by the present author, we show that the weak equivalence principle in general relativity is equivalent to the equivalence between two forms of the ...
Eiji Konishi
doaj   +1 more source

Holographic Space-Time and Quantum Information

Frontiers in Physics, 2020
The formalism of Holographic Space-time (HST) is a translation of the principles of Lorentzian geometry into the language of quantum information. Intervals along time-like trajectories, and their associated causal diamonds, completely characterize a ...
Tom Banks
doaj   +1 more source

Accurate automatic object 4D tracking in digital in-line holographic microscopy based on computationally rendered dark fields

Scientific Reports, 2022
Building on Gabor seminal principle, digital in-line holographic microscopy provides efficient means for space–time investigations of large volumes of interest.
Mikołaj Rogalski, Jose Angel Picazo-Bueno, Julianna Winnik, Piotr Zdańkowski, Vicente Micó, Maciej Trusiak   +5 more
doaj   +1 more source

Tunable Sound Absorption via Evanescent‐Wave Coupling in Asymmetric Bilayer Metasurfaces

Advanced Science, EarlyView.
Tunable sound absorption is realized through a bilayer metasurface system governed by evanescent‐wave coupling. This work demonstrates that such evanescent‐wave coupling provides a controllable scattering channel that destructively interferes with the specular reflection.
Pyung Sik Ma, Hyung Jin Lee
wiley   +1 more source

Quantum Holography from Fermion Fields

Quantum Reports, 2021
In this paper, we demonstrate, in the context of Loop Quantum Gravity, the Quantum Holographic Principle, according to which the area of the boundary surface enclosing a region of space encodes a qubit per Planck unit.
Paola Zizzi
doaj   +1 more source