Results 71 to 80 of about 5,742 (195)
Low‐Frequency Raman Spectra of Natural Pyrrhotites: Polarization Dependence for Its Lattice Modes
Journal of Raman Spectroscopy, Volume 56, Issue 12, Page 1529-1536, December 2025.The present study found low‐wavenumber Raman modes of pyrrhotite Fe1‐xS at ~68, ~87, ~117, and ~230 cm−1 for the first time, thanks to a lab‐built Raman spectrometer, in which the optical path of the incident laser was purged by Ar gas. The sufficiently high signal‐to‐noise and signal‐to‐base ratios enabled us to obtain the polarization dependence of ...
Shu‐hei Urashima +5 more
wiley +1 more source
Miniaturised wideband bandpass filter based on harmonic suppressed dual transmission lines
Electronics Letters, 2016 A novel miniaturised wideband bandpass filter (BPF) based on harmonic suppressed dual transmission lines (DTLs) is introduced with enhanced upper stopband rejection and passaband selectivity.
Bo Zhang +3 more
doaj +1 more source
Observation of quantum fingerprinting beating the classical limit [PDF]
, 2016 Quantum communication has historically been at the forefront of advancements, from fundamental tests of quantum physics to utilizing the quantum-mechanical properties of physical systems for practical applications.
Chen, Si-Jing +12 more
core +2 more sources
Laser &Photonics Reviews, Volume 19, Issue 21, November 6, 2025.Ultra‐thin, tunable bandpass filters are a pathway to realizing mid‐infrared spectrometers that are compact, low power, and performant. The authors elicit 141 nanometres of passband tunability in the mid‐infrared in silicon on sapphire zero‐contrast gratings by exploiting silicon's high thermo‐optic coefficient.
Benjamin J. Russell +3 more
wiley +1 more source
High Dynamic Range RF Front End with Noise Cancellation and Linearization for WiMAX Receivers [PDF]
, 2012 This research deals with verification of the high dynamic range for a heterodyne radio frequency (RF) front end. A 2.6 GHz RF front end is designed and implemented in a hybrid microwave integrated circuit (HMIC) for worldwide interoperability for ...
Chuang, C.-J., Wu, J.-M., Yeh, C.-H.
core +1 more source
Illuminating Advances in Materials: Optical Physical Unclonable Functions for Security Applications
Advanced Optical Materials, Volume 13, Issue 29, October 13, 2025.This review highlights Optical Physical Unclonable Functions (OPUFs) as secure, light‐driven authentication tools. It surveys material platforms including optical fibers, low‐dimensional materials, luminophores, plasmonic nanoparticles and rare earth OPUFs systems.
Syeda Ramsha Ali +4 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. +3 more
core
Spontaneous Parametric Down‐Conversion in 4H‐SiC Integrated Platform
Laser &Photonics Reviews, Volume 19, Issue 17, September 4, 2025.Photon‐pair generation in 4H‐SiC‐on‐insulator integrated platform is demonstrated through spontaneous parametric down conversion. Different second‐order nonlinear interactions are also shown in 4H‐SiC waveguides, highlighting the potential to exploit diverse phase‐matching mechanisms on this platform.
Xiaodong Shi +12 more
wiley +1 more source
A silicon implementation of the fly's optomotor control system [PDF]
, 2000 Flies are capable of stabilizing their body during free flight by using visual motion information to estimate self-rotation. We have built a hardware model of this optomotor control system in a standard CMOS VLSI process. The result is a small, low-power
Harrison, Reid R., Koch, Christof
core +1 more source
Neurology and Clinical Neuroscience, Volume 13, Issue 5, Page 375-378, September 2025.ABSTRACT Interictal focal paroxysmal fast activity is a pattern seen in scalp electroencephalography recordings of patients with epilepsy, but its clinical relevance remains unclear. High‐frequency oscillations, considered a surrogate marker of epileptogenicity, are being studied in relation to scalp electroencephalography. To explore the importance of
Tatsuya Sato +9 more
wiley +1 more source