Results 61 to 70 of about 4,695 (219)

Tunable bound states in the continuum through hybridization of 1D and 2D metasurfaces

Nanophotonics, Volume 14, Issue 27, Page 4973-4981, December 2025.
Abstract This work presents a novel approach to create and dynamically control quasi‐bound states in the continuum (BIC) resonances through the hybridization of 1D and 2D metasurfaces using micro‐electromechanical systems (MEMS). The quasi‐BIC resonance’s central wavelength and quality factor are precisely tuned by introducing out‐of‐plane symmetry ...
Fedor Kovalev, Mariusz Martyniuk, Andrey Miroshnichenko, Ilya Shadrivov   +3 more
wiley   +1 more source

Tunable terahertz filter/antenna-sensor using graphene-based metamaterials

Materials & Design, 2022
In this paper, a novel tunable graphene-based bandstop filter/antenna-sensor is presented. This structure is an integrated module that can be used to combine filtering and high-gain radiation performance.
Meisam Esfandiyari, Ali Lalbakhsh, Saughar Jarchi, Mohsen Ghaffari-Miab, Hamideh Noori Mahtaj, Roy B.V.B. Simorangkir   +5 more
doaj   +1 more source

Compact Millimeter-Wave Bandpass Filters Using Quasi-Lumped Elements in 0.13-um (Bi)-CMOS Technology for 5G Wireless Systems [PDF]

, 2019
© 2019 IEEE.A design methodology for a compact millimeter-wave on-chip bandpass filter (BPF) is presented in this paper. Unlike the previously published works in the literature, the presented method is based on quasi-lumped elements, which consists of a ...
Bautista, Meriam Gay, Dutkiewicz, Eryk, Sun, Yichuang, Yang, Yang, Zhu, He, Zhu, Xi   +5 more
core   +2 more sources

Spatial mapping of dissolved methane using an in situ sensor in Puget Sound

Limnology and Oceanography: Methods, Volume 23, Issue 11, Page 804-814, November 2025.
Abstract Release of methane, as gas bubbles or in the dissolved phase, from the seafloor has been observed in coastal waters (< 200 m) and deep ocean basins (> 1000 m). Methane dissolution within the water column affects the geochemistry of the surrounding water, leading to localized oxygen loss and potential escape to the atmosphere, particularly from
Alexandra M. Padilla, William Pardis, Jason Kapit, Tor A. Bjorklund, Nicholas D. Ward, Daniel J. Fornari, Susan Hautala, William F. Waite, H. Paul Johnson, Anna P. M. Michel   +9 more
wiley   +1 more source

Cascaded wavelength conversions using four-wave mixing in semiconductor optical amplifiers [PDF]

, 1997
Wavelength conversion in wavelength-division multiplexed (WDM) communication systems would provide significant network performance improvement. Optoelectronic, cross-gain saturation, and cross phase saturation wavelength converters are candidate ...
Geraghty, David F., Koren, Uzi, Lee, Robert B., Vahala, Kerry J.   +3 more
core  

Piezoelectric transducer tuned bandstop filter

Electronics Letters, 2002
A tunable bandstop filter with a wide tuning range is presented. A piezoelectric transducer with an attached dielectric perturber is used to perturb the filter to obtain a wide tuning range. Without changing the dimensions of the bandstop filter, the tunable bandstop filter can provide a wide tuning range of 25% from 4.5 to 6 GHz.
Lung-Hwa Hsieh, Kai Chang
openaire   +1 more source

Reconfigurable Balanced Dualband Bandstop Filter

2020 International Applied Computational Electromagnetics Society Symposium (ACES), 2020
This paper introduces a novel architecture of reconfigurable balanced (differential) dualband bandstop filter (BSF). In differential mode (DM), each symmetrical bisection of the filter incorporates in-series cascade of two tunable dualband bandstop sections whereas high CMRR is achieved by loading open stubs to the symmetry plane of the branch line ...
Dubari Borah, Thottam Kalkur
openaire   +1 more source

Toward photonic crystal based spatial filters with wide angle ranges of total transmission [PDF]

, 2009
Cataloged from PDF version of article.Spatial filters with steep switching between wide ranges of total transmission and total reflection can be obtained by using two-dimensional dielectric photonic crystals, which are a few wavelengths thick.
Ozbay, E., Petrov, A. Y., Serebryannikov, A. E.   +2 more
core   +1 more source

Computational modelling of the impact of anatomical changes on ECGs in left ventricular hypertrophy

The Journal of Physiology, Volume 603, Issue 19, Page 5387-5413, October 1, 2025.
Abstract figure legend Eccentric and concentric left ventricular hypertrophy distinctly alter 12‐lead ECG signals. Eccentric hypertrophy predominantly increases voltages in the precordial leads, whereas concentric hypertrophy affects voltages across all leads in a variable manner.
Mohammadreza Kariman, Karli Gillette, Matthias A. F. Gsell, Anton J. Prassl, Gernot Plank, Christoph M. Augustin   +5 more
wiley   +1 more source

Design and Characterization of MSAP‐Fabricated Sub‐THz Frequency Selective Surface by Bench‐Top Optoelectronic Measurement System

Microwave and Optical Technology Letters, Volume 67, Issue 9, September 2025.
ABSTRACT A low‐cost and compact benchtop using the off‐the‐shelf optoelectronic (OE) measurement system is presented which is built to measure the performance of a 160 GHz frequency selective surface (FSS). The system uses an optical heterodyne source to excite wireless signals through the ‐D‐band (110–170 GHz), and transmission magnitude is measured ...
Keigan Macdonell, Takashi Tomura, Shulabh Gupta   +2 more
wiley   +1 more source