Results 51 to 60 of about 8,816 (222)

Pseudospectral methods versus FDTD [PDF]

IEEE Antennas and Propagation Society International Symposium. Transmitting Waves of Progress to the Next Millennium. 2000 Digest. Held in conjunction with: USNC/URSI National Radio Science Meeting (Cat. No.00CH37118), 2002
In this paper pseudospectral methods are applied to the solution of electromagnetic problems. Specifically, the Chebyshev collocation method is used along with a mapping of the grid to relax the restrictions on the time-step. Entire-domain as well as multi-domain approaches are considered.
S.V. Georgakopoulos, C.A. Balanis, R. Renaut   +2 more
openaire   +1 more source

Label‐Free SERS Fingerprinting of Neuroprotein Conformational Dynamics in Human Saliva

Advanced Materials, EarlyView.
Galvanic molecular entrapment (GME) is a label‐free method for detecting and quantifying neuroprotein conformational states. This technique enables direct surface binding and in situ hotspot generation around molecules, effectively overcoming challenges related to target localization and mismatched hotspot geometries.
Muhammad Shalahuddin Al Ja'farawy, Jun‐Yeong Yang, Chaewon Mun, Seunghun Lee, Chul Bum Cho, Yoo Hyun Um, Min‐Young Lee, Sung‐Gyu Park, Dong‐Ho Kim, Seung Ho Yang, Ho Sang Jung   +10 more
wiley   +1 more source

Large‐Area 2D Metasurface‐Based Triboelectric E‐Skin Arrays: Contact & Proximity Tactile Mapping with Broadband Acoustic Readouts

Advanced Materials, EarlyView.
Metasurface‐engineered NC‐TENG arrays integrate tactile pressure mapping, non‐contact gesture sensing, and acoustic signal readouts in one ultrathin module, and outperforms pristine PDMS in terms of electrical output and real‐time spatial mapping for next‐gen wearables.
Injamamul Arief, Swagato Sarkar, Anik Kumar Ghosh, Osvalds Verners, Kamal Kumar Meena, Su‐Hyeong Lee, Soosang Chae, Tobias A. F. König, Beate Krause, Andreas Fery, Mehmet Sait Özer, Anindya Nag, Amit Das   +12 more
wiley   +1 more source

Formation of Laser‐Induced Periodic Surface Structures on Titanium Alloy Using a Picosecond Laser: Dependence on Fluence and Number of Laser Pulses

Advanced Materials Interfaces, EarlyView.
Laser treatment of materials is a versatile technique for generating ordered surface structures. Nevertheless, such structures are the result of laser parameters such as laser pulse fluence. We demonstrate that homogeneous low special frequency laser‐induced periodic surface structures are contingent on both single and effective fluence dose and can be
Iana Fomicheva, Petr Druzhinin, Hans Amler, Alexander B. Tesler, George Sarau, Gerd Leuchs, Silke H. Christiansen   +6 more
wiley   +1 more source

Responsive Visible‐Wavelength Metasurfaces from Porous Silicon Based on Fano Guided‐Mode Resonance

Advanced Optical Materials, EarlyView.
The article introduces mesoporous silicon metasurfaces (pSi‐MS) supporting Fano guided‐mode resonances in the visible regime. By combining top‐down lithographic patterning of 2D gratings with bottom‐up electrochemical porosification, the approach realizes a new class of responsive metasurfaces, enabling highly sensitive and portable platforms for small
Tomoshree Dash, Saddam Gafsi, Estevao Marques Dos Santos, Ivan Kravchenko, Judson D. Ryckman   +4 more
wiley   +1 more source

Optical Polarization Response of Hybrid Gratings Made of Metals and Polymers Based on Bruggeman Theory

Cumhuriyet Science Journal
In the current state of the art of grating designs, compositions involving different metals and polymers have not been adequately addressed. Our study aims to fill this gap by investigating the influence of varying material compositions on polarization ...
Talha Erdem, Emirhan Taze
doaj   +1 more source

Design of an Improved Optical Filter Based on Dual-Curved PCRR for WDM Systems [PDF]

Journal of Optoelectronical Nanostructures, 2017
In this paper, an optical filter based on a two dimensional photonic crystalring resonator (PCRR) with triangular lattice is designed and presented. For thispurpose, the effects of positioning, arrangement and the number of the inner rods of thedual ...
Vahid Fallahi, Mahmood Seifouri
doaj  

Direct-Splitting-Based CN-FDTD for Modeling 2D Material Nanostructure Problems

IEEE Open Journal of Antennas and Propagation, 2020
Incorporating a truncation of the complex-frequency-shifted perfectly matched layer (CFS-PML), the direct-splitting- based Crank-Nicolson finite-difference time-domain (CNDS-FDTD) is developed and applied to the infrared two-dimensional layered material (
Naixing Feng, Yuxian Zhang, Qingsheng Zeng, Meisong Tong, William T. Joines, Guo Ping Wang   +5 more
doaj   +1 more source

Electrically Reconfigurable Nonvolatile Transmissive Metasurface in Visible

Advanced Optical Materials, EarlyView.
An electrically reconfigurable, non‐volatile metasurface operating in the visible spectrum is demonstrated using just 20 nm thick wide‐bandgap phase change material Sb2S3. On integration with a custom ultrathin silicon micro‐heater, the device achieves reversible switching with a 16 nm resonance tuning range at 610 nm, a wavelength largely under ...
Virat Tara, Romil Audhkhasi, Andrew Tang, Rui Chen, Johannes E. Fröch, Abhinav Kala, Juejun Hu, Arka Majumdar   +7 more
wiley   +1 more source

Simulation of interaction of antennas in the near zone

Вісник Харківського національногоуніверситету імені В.Н. Каразіна. Серія: Радіофізика та електроніка
Relevance. Obtaining the minimization or maximization of the interaction between the radiating and receiving antennas (or the receiving antenna with fields reflected from some obstacle) due to the orientation and location of the antennas at a certain ...
М. Legenkiy, V. Khrychov
doaj   +1 more source