Results 51 to 60 of about 3,783 (193)

Ultrahigh‐Order Harmonic Mode‐Locked Optoelectronic Oscillator

Laser &Photonics Reviews, EarlyView.
This article demonstrates a record‐breaking microwave frequency comb generator using an ultrahigh‐harmonic‐order mode‐locked optoelectronic oscillator. By integrating dual recirculating loops into a low‐coherence system, the researchers achieved a harmonic order of 956 with superior noise suppression.
Zhuoran Wang, Santiago Bernal, David V. Plant, Lawrence R. Chen   +3 more
wiley   +1 more source

Hybrid Fourier-domain mode-locked laser for ultra-wideband linearly chirped microwave waveform generation

Nature Communications, 2020
Linearly chirped microwave waveforms with high time-bandwidth products would have important applications but are difficult to achieve. Here the authors generate such a waveform in a photonic setting by implementing a micro-disk resonator as a tunable ...
Jian Tang, Beibei Zhu, Weifeng Zhang, Ming Li, Shilong Pan, Jianping Yao   +5 more
doaj   +1 more source

Design of a Microstrip Three-State Switchable and Fully Tunable Bandpass Filter With an Extra-Wide Frequency Tuning Range

IEEE Access, 2020
In this study, a new method and structure are proposed to design of a switchable and fully tunable microstrip bandpass filter (BPF). The central frequency and bandwidth (or the resonance frequency of the resonators, coupling coefficient between ...
Chi-Feng Chen
doaj   +1 more source

HoloSpec: Dispersion‐Based 4D Computational Holographic Hyperspectral Imaging

Laser &Photonics Reviews, EarlyView.
HoloSpec, a compact dispersion‐based computational holographic system, achieves four‐dimensional imaging by retrieving 3D spatial structure and high‐resolution spectra from only two monochromatic snapshots. Using a single prism and a monochrome sensor, it resolves 430 spectral channels with 3 nm experimental resolution and 30 μm$\mathrm{\mu}\mathrm{m}$
Jingyan Chen, Yuxing Li, Yanmin Zhu, Edmund Y. Lam   +3 more
wiley   +1 more source

Design of Wideband Substrate Integrated Waveguide Filters With Tunable Lowpass Characteristics

IEEE Access
In this paper, the application of the stepped impedance synthesis technique in the design of tunable wideband substrate integrated waveguide (SIW) Chebyshev filters is explored.
Clara Maximo-Gutierrez, Juan Hinojosa, Alejandro Alvarez-Melcon   +2 more
doaj   +1 more source

Parallel Multi‐Target Detection for Quantum LiDAR

Laser &Photonics Reviews, EarlyView.
Parallel multi‐target detection is achieved in quantum LiDAR with a single‐pixel quantum readout. Direction and distance information are extracted together, allowing multiple objects to be distinguished under noisy low‐light conditions and pointing to a new strategy for scan‐free quantum remote sensing.
Junyeop Kim, Dongjin Lee, Woncheol Shin, Yeoulheon Seong, Heedeuk Shin   +4 more
wiley   +1 more source

A Tunable Lumped-Element Bandpass Filter with Independent Continuous Tuning of Center Frequency and Bandwidth

Известия высших учебных заведений России: Радиоэлектроника, 2016
An approach to design tunable bandpass filters on coupled series LC-tanks with variable capacitors is proposed. Such filters are shown able to provide an independent continuous tuning of center frequency and bandwidth.
A. E. Baskakova, V. M. Turgaliev, D. V. Kholodnyak   +2 more
doaj  

Two‐Photon Endomicroscopy for Image‐Guided Magnetic Micro‐Agents

Small, EarlyView.
Image‐guided manipulation of magnetic micro‐agents requires localized fluorescence feedback capable of resolving dynamic interactions in confined environments. This study introduces a two‐photon endomicroscopy platform for real‐time motion tracking, multicolor micro‐agent discrimination, and imaging through biological tissue.
Juan J. Huaroto, Gert‐willem Römer, Ivo M. Vellekoop, Sarthak Misra   +3 more
wiley   +1 more source

Dual Quantum Dot Molecular FRET Probes for Picomolar DNA Hexaplexing

Small Methods, EarlyView.
Multiplexed quantification of six different DNA targets from a single 200 µL sample at picomolar concentrations was accomplished by spectrotemporal detection of time‐resolved FRET from a single Tb‐complex donor to two quantum dot acceptors using one‐color excitation and two‐color detection.
Ruifang Su, Federico Pini, Nour Fayad, Kimihiro Susumu, Marta M. Natile, Igor L. Medintz, Thibault Gallavardin, Thomas J. Sørensen, Niko Hildebrandt   +8 more
wiley   +1 more source

Confinement‐Induced Enhancement of Solid‐State Emission Quantum Yield in Rubrene@MOF Hybrid Materials

Zeitschrift für anorganische und allgemeine Chemie, EarlyView.
Pore‐size‐controlled nanoconfinement of rubrene within UiO‐66 and UiO‐67 suppresses aggregation‐caused quenching and restores bright solid‐state emission. Geometric exclusion and energetic destabilization prevent parallel stacking, yielding solution‐like absorption and fluorescence quantum yields up to 25%.
Julia Larcher, Viktoria Kiefer, Manuel Ott, Armin Penz, Thomas S. Hofer, Gregor Jung, Heidi A. Reichl   +6 more
wiley   +1 more source