Results 41 to 50 of about 9,188 (232)

Self‐Assembled Calcite Architectures for Programmable Information Storage

Advanced Materials Technologies, EarlyView.
Programmable biomineralization enables the formation of 3D calcite architectures that encode information through spatially defined refractive‐index modulations. Data are written via laser‐directed mineralization, stored in stable voxelized mineral structures, and retrieved non‐destructively through optical diffraction, offering a pathway toward ultra ...
Congrui Jin, Yong Huang, Mehdi Ranjkesh Rashteh Roudi   +2 more
wiley   +1 more source

Microcone Array‐Mediated Distance Tuning for Photonic Nanojet‐Amplified SERS

Advanced Optical Materials, EarlyView.
A tunable microcone array platform provides precise vertical gap control between dielectric microspheres and a SERS‐active surface. This structural regulation aligns the photonic nanojet focal point with plasmonic hotspots, delivering a 15‐fold optical signal enhancement.
Chen‐Ting Hung, Yan‐Ru Liu, Ko‐Chi Chen, You‐Chia Chang, Yuh‐Lin Wang, Yih‐Fan Chen   +5 more
wiley   +1 more source

A comparison of FDTD-PML with TDIE

IEEE Transactions on Antennas and Propagation, 2002
Presented in this paper, is a comparison of two popular numerical techniques, viz. the finite-difference time-domain method and the time domain integral equation method, for electromagnetic-scattering problems. The comparison is made via standard canonical shapes, a cube, and a sphere, to address the factors affecting accuracy, efficiency, and the ...
Sachdeva, Niraj, Rao, Sadasiva M, Balakrishnan, N   +2 more
openaire   +2 more sources

Deterministic Integration of Quantum Emitters and Optical Cavities in a Van Der Waals Crystal

Advanced Optical Materials, EarlyView.
The work demonstrates fabrication of Circular Bragg Grating (CBG) cavities with embedded emitters in hBN. The cavities are fabricated around a pre‐characterised quantum emitter. The integrated platform enables light matter interaction and access to brighter emitters and spins in hBN.
James Liddle‐Wesolowski, Otto Cranwell Schaeper, Nathan Coste, Benjamin Whitefield, Evan Williams, Helen Zhi Jie Zeng, Mehran Kianinia, Anastasiia Zalogina, Igor Aharonovich   +8 more
wiley   +1 more source

Model of light bullet propagation in LiF crystal

Компьютерная оптика
A numerical model is developed for simulation of the propagation of a light bullet in LiF crystal and the formation of a colored track. The model reproduces the previously observed longitudinal oscillations in the concentration of color centers in the ...
A.V. Kuznetsov
doaj   +1 more source

Photonic Time Crystals and Time‐Varying Electromagnetic Metamatter: A New Direction for Ultrafast Tunable Photonic and Microwave Materials and Devices

Advanced Science, EarlyView.
Photonic time crystals (PTCs) are systems in which electromagnetic parameters are modulated periodically in time, producing momentum bandgaps via temporal scattering rather than spatial Bragg processes. This review examines the theoretical frameworks, modeling, and computational tools for time‐varying media, and summarizes experimental demonstrations ...
Ranjan Kumar Patel, Shriram Ramanathan, Ronald P. Jenkins, Michael J. Carter   +3 more
wiley   +1 more source

An overview on plasmon-enhanced photoluminescence via metallic nanoantennas

Nanophotonics
In the realm of nanotechnology, the integration of quantum emitters with plasmonic nanostructures has emerged as an innovative pathway for applications in quantum technologies, sensing, and imaging.
Montaño-Priede José Luis, Zapata-Herrera Mario, Esteban Ruben, Zabala Nerea, Aizpurua Javier   +4 more
doaj   +1 more source

An Artificial Anisotropy Four-Step HIE-FDTD Method With Lower Numerical Dispersion Error

IEEE Access, 2020
In this article, by introducing artificial anisotropic (AA) parameters in the four-step hybrid implicit-explicit finite-difference time domain (HIE-FDTD) method, an AA four-step HIE-FDTD method is proposed, which can reduce the numerical dispersion error
Yong-Dan Kong, Chu-Bin Zhang, Hong-Yu Zhang, Qing-Xin Chu   +3 more
doaj   +1 more source

FDTD modelling of reverberation chamber

Electronics Letters, 2005
The finite-difference time-domain (FDTD) method is applied to the simulation of a reverberation chamber. The real losses of the reverberation chamber are taken into account in a post-treatment process. The predicted results are compared with measured data and good agreement is reported.
Bonnet, Pierre, Vernet, Raphaël, Girard, Sébastien, Paladian, Françoise   +3 more
openaire   +3 more sources

SERS Facemask for Rapid and Portable Sensing Mycobacterium Tuberculosis Antigens for TB Screening

Advanced Science, EarlyView.
Our study introduced an Au─Ag embedded covalent organic framework (U@COF) ‐mediated facemask for sensing TB antigen ESAT‐6/CFP‐10 complex in clinical droplet samples toward TB screening. Practical analysis of clinical samples demonstrated the availability of our facemask, which is capable of identifying the TB subjects (N = 17) from healthy candidates (
Lingzhi Chen, Jiaqi Yu, Jing Xu, Lingqi Chen, Ninghao Zhang, Wenrui Li, Runmin Zeng, Xiaomin Luo, Yiqun Chang, Jiayin Lai, Wenshi Huang, Xiaochen Liang, Ting Zhao, Shanze Chen, Huaihong Cai, Yanguang Cong, Pinghua Sun, Jiang Pi, Xueqin Huang, Haibo Zhou, Junxia Zheng   +20 more
wiley   +1 more source