Youwen Liu
YOU?
Author Swipe
View article: Underwater active polarization imaging for targets with complex polarization properties based on dual global estimation
Underwater active polarization imaging for targets with complex polarization properties based on dual global estimation Open
View article: Imaging through scattering media under strong background illumination based on symmetrized speckles
Imaging through scattering media under strong background illumination based on symmetrized speckles Open
Imaging through scattering media is vital for biomedical and astronomical applications. While memory-effect-based methods, including speckle correlation and speckle deconvolution, are characterized by their simplicity and convenience, stro…
View article: Ultrathin lensed fiber-based manual scanning optical coherence tomography needle probe for the detection of the interproximal caries
Ultrathin lensed fiber-based manual scanning optical coherence tomography needle probe for the detection of the interproximal caries Open
We propose an ultrathin lensed fiber-based manual scanning OCT needle probe potentially useful for the interproximal caries detection. The design, fabrication, and performances of the developed needle probe are demonstrated. We address a c…
View article: Tunable interlayer coupling in twisted 2D organic–inorganic heterostructure
Tunable interlayer coupling in twisted 2D organic–inorganic heterostructure Open
View article: Giant built-in electric field enabled quantum-confined Stark effects
Giant built-in electric field enabled quantum-confined Stark effects Open
View article: Topological-charge multiplexed metasurfaces for generating structural acoustic field and remote dynamic control
Topological-charge multiplexed metasurfaces for generating structural acoustic field and remote dynamic control Open
Structured acoustic field carrying phase singularities in spatial and temporal domains is fundamentally important for acoustic communications and acoustofluidic manipulations. However, the current approaches to structured sound often have …
View article: Diffraction regimes of phase gradient metasurfaces in background media with symmetry breaking
Diffraction regimes of phase gradient metasurfaces in background media with symmetry breaking Open
We theoretically investigate the far-field diffraction patterns of phase gradient metagratings (PGMs) in symmetry-breaking background media. We will show that the breaking of spatial symmetry induces breaking of the corresponding diffracti…
View article: Construction of optical lattice-type skyrmion arrays in tightly focused electromagnetic field
Construction of optical lattice-type skyrmion arrays in tightly focused electromagnetic field Open
By utilizing the time inversion of radiation from spatial dipole arrays, we propose a method for constructing the spatial lattice-type skyrmion arrays under 4 π focusing conditions, including Néel-, Bloch-, and Anti-skyrmions/merons. The R…
View article: All-Dielectric Dual-Band Anisotropic Zero-Index Materials
All-Dielectric Dual-Band Anisotropic Zero-Index Materials Open
Zero-index materials, characterized by near-zero permittivity and/or permeability, represent a distinctive class of materials that exhibit a range of novel physical phenomena and have potential for various advanced applications. However, c…
View article: Super-resolution acoustic displacement metrology through topological pairs in orbital meta-atoms
Super-resolution acoustic displacement metrology through topological pairs in orbital meta-atoms Open
View article: Functional control of anomalous reflection via engineered metagratings without polarization limitations
Functional control of anomalous reflection via engineered metagratings without polarization limitations Open
Metagratings (MGs) have emerged as a promising platform for manipulating the anomalous propagation of electromagnetic waves. However, traditional methods for designing functional MG-based devices face significant challenges, including comp…
View article: Enhancement of Transverse Magneto-Optic Kerr effect in subwavelength all-dielectric guided mode gratings with a buffer layer
Enhancement of Transverse Magneto-Optic Kerr effect in subwavelength all-dielectric guided mode gratings with a buffer layer Open
We demonstrate a simple subwavelength all-dielectric photonic device with greatly enhanced transverse magneto-optical Kerr effect (TMOKE) in the transmission mode. The concept utilizes the diffracted waves of the periodic magnetic material…
View article: Full-range depth-encoded swept source polarization sensitive optical coherence tomography
Full-range depth-encoded swept source polarization sensitive optical coherence tomography Open
To realize the high sensitivity polarization sensitive optical coherence tomography (PS-OCT) imaging, a fiber-based full-range depth-encoded swept source PS-OCT (SS-PS-OCT) method is proposed. The two OCT images corresponding to the orthog…
View article: General phase-difference imaging of incoherent digital holography
General phase-difference imaging of incoherent digital holography Open
The hologram formed by incoherent holography based on self-interference should preserve the phase difference information of the object, such as the phase difference between the mutually orthogonal polarizations of anisotropic object. How t…
View article: Optical properties and enhanced Faraday rotation in three-layer hybrid magneto-plasma crystals with C4h symmetry
Optical properties and enhanced Faraday rotation in three-layer hybrid magneto-plasma crystals with C4h symmetry Open
We investigate the optical properties and magneto-optical (MO) Faraday effect of a type of hybrid magneto-plasma crystal (HMPC) that is composed of a magnetic layer sandwiched between two Ag layers containing an array of holes. It is found…
View article: Frequency selection rule for the HDHF Lissajous scanning imaging with a low-voltage one axis actuated PZT scanner based on an asymmetric fiber cantilever
Frequency selection rule for the HDHF Lissajous scanning imaging with a low-voltage one axis actuated PZT scanner based on an asymmetric fiber cantilever Open
Lissajous micro scanners are very attractive in compact laser scanning applications for biomedical endoscopic imaging, such as confocal microscopy, endomicroscopy or optical coherence tomography. The scanning frequencies have a very import…
View article: Enhancement of Transverse Magneto-Optic Kerr Effect in Subwavelength All-Dielectric Guided Mode Gratings with a Buffer Layer
Enhancement of Transverse Magneto-Optic Kerr Effect in Subwavelength All-Dielectric Guided Mode Gratings with a Buffer Layer Open
View article: Overlapping speckle correlation algorithm for high-resolution imaging and tracking of objects in unknown scattering media
Overlapping speckle correlation algorithm for high-resolution imaging and tracking of objects in unknown scattering media Open
View article: Giant built-in electric field enabled quantum-confined Stark effects
Giant built-in electric field enabled quantum-confined Stark effects Open
Quantum-confined Stark effects (QCSEs), where external or built-in electric fields modify optical transition energies1-6, have garnered significant interest due to their potential for tuning emission energies to couple with quan…
View article: Geometric Phase in Twisted Topological Complementary Pair
Geometric Phase in Twisted Topological Complementary Pair Open
Geometric phase enabled by spin‐orbit coupling has attracted enormous interest in optics over the past few decades. However, it is only applicable to circularly‐polarized light and encounters substantial challenges when applied to wave fie…
View article: Enhancement of Transverse Magneto-Optic Kerr Effect in Subwavelength All-Dielectric Guided Mode Gratings with a Buffer Layer
Enhancement of Transverse Magneto-Optic Kerr Effect in Subwavelength All-Dielectric Guided Mode Gratings with a Buffer Layer Open
We demonstrate a simple subwavelength all-dielectric photonic device with greatly enhanced transverse magneto-optical Kerr effect (TMOKE) in the transmission mode. The concept utilizes the diffracted waves of the periodic magnetic material…
View article: Tunable dual quasi-bound states in continuum and electromagnetically induced transparency enabled by the broken material symmetry in all-dielectric compound gratings
Tunable dual quasi-bound states in continuum and electromagnetically induced transparency enabled by the broken material symmetry in all-dielectric compound gratings Open
Dual quasi-bound states in continuum (quasi-BICs) enabled by the broken geometric symmetry offer an effective way to design high-quality photonic devices, yet challenged by tunable functionalities. Here we employ the material asymmetry ori…
View article: Design and Performance Analysis of a Tri-Layer Magnetic Plasma Structure for Enhanced Faraday Rotation and Transmittance
Design and Performance Analysis of a Tri-Layer Magnetic Plasma Structure for Enhanced Faraday Rotation and Transmittance Open
View article: Polarization-multiplexed, single-cavity dual-comb fiber laser based on a birefringent crystal and a saturable absorber
Polarization-multiplexed, single-cavity dual-comb fiber laser based on a birefringent crystal and a saturable absorber Open
We introduce a calcium carbonate birefringent crystal into an Er-fiber laser mode-locked by a saturable absorber, where dual-comb ultrashort pulses with orthogonal polarization have been obtained. The two ultrashort pulse trains from the l…
View article: Reporting Excellent Transverse Piezoelectric and Electro‐Optic Effects in Transparent Rhombohedral PMN‐PT Single Crystal by Engineered Domains
Reporting Excellent Transverse Piezoelectric and Electro‐Optic Effects in Transparent Rhombohedral PMN‐PT Single Crystal by Engineered Domains Open
Adv. Mater. 2021, 33, 2103013 DOI: 10.1002/adma.202103013 1. In the rectangular coordinate system 2 of Figure 1 in the published article, the original coordinate axis Y2 [ 1 ¯ 01 $\bar{1}01$ ] is marked incorrectly, and is hereby corrected…
View article: Reconfigurable chiral exceptional point and tunable non-reciprocity in a non-Hermitian system with phase-change material
Reconfigurable chiral exceptional point and tunable non-reciprocity in a non-Hermitian system with phase-change material Open
Non-Hermitian optics has emerged as a feasible and versatile platform to explore many extraordinary wave phenomena and novel applications. However, owing to ineluctable systematic errors, the constructed non-Hermitian phenomena could be ea…
View article: Development of the TOA-Related Models for PM2.5 Prediction Pre- and Post-COVID-19 Outbreak over Yangtze River Delta Region of China
Development of the TOA-Related Models for PM2.5 Prediction Pre- and Post-COVID-19 Outbreak over Yangtze River Delta Region of China Open
The lockdown and the strict regulation measures implemented by Chinese government due to the outbreak of the COVID-19 pandemic not only decelerated the spread of the virus but also brought a positive effect on the nationwide atmospheric qu…
View article: Asymmetric nonlinear-mode-conversion in an optical waveguide with PT symmetry
Asymmetric nonlinear-mode-conversion in an optical waveguide with PT symmetry Open
Asymmetric mode transformation in waveguide is of great significance for on-chip integrated devices with one-way effect, while it is challenging to achieve asymmetric nonlinear-mode-conversion (NMC) due to the limitations imposed by phase-…
View article: Reconfigurable ultra-compact graphene-based plasmonic devices
Reconfigurable ultra-compact graphene-based plasmonic devices Open
We have proposed and investigated an ultra-compact graphene-based plasmonic device, where the propagation direction of SPP can be controlled flexibly by changing the chemical potential of graphene. The plasmonic devices with numerous funct…
View article: Methodology on Establishing Multivariate Failure Thresholds for Improved Remaining Useful Life Prediction in PHM
Methodology on Establishing Multivariate Failure Thresholds for Improved Remaining Useful Life Prediction in PHM Open
Prognostics and Health Management (PHM) methodologies and techniques have been much widely studied in the academia and practiced by the industry in recent years. Prognostic approaches commonly try to establish the relationship between Rema…