Jianquan Yao
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View article: Highly sensitive broadband photodetector based on PtSe <sub>2</sub> photothermal effect and fiber harmonic Vernier effect
Highly sensitive broadband photodetector based on PtSe <sub>2</sub> photothermal effect and fiber harmonic Vernier effect Open
Platinum diselenide (PtSe 2 ), a two-dimensional material, has shown exceptional promise in photodetection applications because of its air stability, high carrier mobility, and layer-tunable bandgap. However, conventional photoconductive m…
View article: Subwavelength‐Resolution Terahertz Hologram with Arbitrary Curved Trajectory and Customized Polarization Structures
Subwavelength‐Resolution Terahertz Hologram with Arbitrary Curved Trajectory and Customized Polarization Structures Open
Terahertz holography plays an important role in modern information photonics. However, conventional methods suffer from large pixel sizes due to the wavelength diffraction limit and a complex setup to generate holograms. Thanks to the unpr…
View article: Nondeterminism-Aware Optimistic Verification for Floating-Point Neural Networks
Nondeterminism-Aware Optimistic Verification for Floating-Point Neural Networks Open
Neural networks increasingly run on hardware outside the user's control (cloud GPUs, inference marketplaces). Yet ML-as-a-Service reveals little about what actually ran or whether returned outputs faithfully reflect the intended inputs. Us…
View article: AutoCode: LLMs as Problem Setters for Competitive Programming
AutoCode: LLMs as Problem Setters for Competitive Programming Open
Writing competitive programming problems is exacting. Authors must: set constraints, input distributions, and edge cases that rule out shortcuts; target specific algorithms (e.g., max-flow, dynamic programming, data structures); and calibr…
View article: High-Precision Phase Compensation Algorithm for Millimeter Wave Radar Near-Field Imaging of Static Random Targets
High-Precision Phase Compensation Algorithm for Millimeter Wave Radar Near-Field Imaging of Static Random Targets Open
In near-field millimeter-wave imaging, the phase processing is crucial. Target randomness challenges phase accuracy. Phase error analysis reveals its origin in inaccurate range parameters. This paper proposes a high-precision phase compens…
View article: Full-Stokes terahertz meta-detector based on diatomic interference mechanism
Full-Stokes terahertz meta-detector based on diatomic interference mechanism Open
Full-Stokes polarimetry allows for the comprehensive characterization of the polarization state of a wave, providing critical information that cannot be obtained through other measurement methods. However, conventional full-Stokes metasurf…
View article: Ultra-sensitive graphene-based toroidal dipole meta-biosensor for trace detection of protein biomarkers in the terahertz band
Ultra-sensitive graphene-based toroidal dipole meta-biosensor for trace detection of protein biomarkers in the terahertz band Open
Biosensors designed using metasurfaces have attracted considerable attention in biomedical diagnostics due to their rapid, label-free, and non-destructive detection capabilities, but it remains challenging to achieve ultra-sensitive detect…
View article: All-silicon terahertz dielectric metasurface with polarization and phase decoupling modulation
All-silicon terahertz dielectric metasurface with polarization and phase decoupling modulation Open
All-dielectric chiral metasurfaces, as an emerging micro-nano optics device, have been favored in the fields of encrypted communication and optical device integration in recent years due to the strong circular dichroism and spinning effect…
View article: Ultra-widely tunable high-power terahertz parametric generation based on synchronized sub-nanosecond pump and nanosecond seeder
Ultra-widely tunable high-power terahertz parametric generation based on synchronized sub-nanosecond pump and nanosecond seeder Open
Terahertz parametric generation (TPG) is one of the most promising techniques for developing high-performance terahertz sources, particularly through the use of sub-nanosecond laser pumping that simultaneously suppresses stimulated Brillou…
View article: Tunable and narrow-linewidth THz difference frequency generator with DAST crystal pumped by dual-seeded KTP optical parametric oscillator
Tunable and narrow-linewidth THz difference frequency generator with DAST crystal pumped by dual-seeded KTP optical parametric oscillator Open
A tunable and narrow-linewidth terahertz (THz) difference frequency generation (DFG) with DAST crystal was demonstrated based on near infrared pump in this paper. A dual-seeded KTP optical parametric oscillator (OPO) was constructed as a p…
View article: Full Poincaré sphere vectorial polarization transformation of terahertz wave based on chiral metasurfaces
Full Poincaré sphere vectorial polarization transformation of terahertz wave based on chiral metasurfaces Open
Metasurfaces exhibit significant advantages in the vectorial polarization manipulation of light beams, owing to their precision and multi-dimensional wave control capabilities in subwavelength-scale. However, metasurfaces for arbitrary vec…
View article: Cascaded metasurface for polarization-dependent varifocal vortex beam manipulation
Cascaded metasurface for polarization-dependent varifocal vortex beam manipulation Open
Vortex beams, characterized by orbital angular momentum (OAM), hold significant potential in optical communications, quantum information processing, and optical manipulation. However, existing metasurface designs are largely confined to si…
View article: LiveCodeBench Pro: How Do Olympiad Medalists Judge LLMs in Competitive Programming?
LiveCodeBench Pro: How Do Olympiad Medalists Judge LLMs in Competitive Programming? Open
Recent reports claim that large language models (LLMs) now outperform elite humans in competitive programming. Drawing on knowledge from a group of medalists in international algorithmic contests, we revisit this claim, examining how LLMs …
View article: Film-to-fiber fabrication of anti-resonant fibers for high-performance terahertz wave transmission
Film-to-fiber fabrication of anti-resonant fibers for high-performance terahertz wave transmission Open
View article: Magnetic resonance imaging features of intrahepatic bile duct adenoma: a 10-year retrospective study
Magnetic resonance imaging features of intrahepatic bile duct adenoma: a 10-year retrospective study Open
The MRI features of BDA included small lesions near the liver capsule, characterized by distinct morphology and enhancement patterns, alongside elevated ADC values that distinguish them from malignant hepatic lesions. The findings emphasiz…
View article: Scaling Physical Reasoning with the PHYSICS Dataset
Scaling Physical Reasoning with the PHYSICS Dataset Open
Large Language Models (LLMs) have achieved remarkable progress on advanced reasoning tasks such as mathematics and coding competitions. Meanwhile, physics, despite being both reasoning-intensive and essential to real-world understanding, r…
View article: Noise Reduction for Atmospheric Rayleigh Lidar Based on a Hybrid EEMD–VMD–IMWOA Method with High Retrieval Accuracy
Noise Reduction for Atmospheric Rayleigh Lidar Based on a Hybrid EEMD–VMD–IMWOA Method with High Retrieval Accuracy Open
The atmospheric lidar echo signal is easily affected by noise and perturbation from the complex environment, which greatly influences the retrieval accuracy and effective retrieval range. To overcome this problem, a novel signal denoising …
View article: Chip-integrated polarization multiplexed metasurface for simultaneous generation of versatile terahertz vortices
Chip-integrated polarization multiplexed metasurface for simultaneous generation of versatile terahertz vortices Open
Terahertz vortex beams, carrying orbital angular momentum (OAM), are quite desirable for enhancing data transmission capability in telecommunication. However, it faces fundamental and technical challenges in a single metasurface to simulta…
View article: Study on the Influence of Water Color on Signal Directionality in Laser-Induced Acoustic Processes
Study on the Influence of Water Color on Signal Directionality in Laser-Induced Acoustic Processes Open
Implementing information encoding in laser acoustic signals by altering the medium’s color is one of the current hot research topics. Modulating the color of the medium can modulate the directionality of laser acoustic signals; however, th…
View article: Thermal-compensated high-stability, high-repetition-rate electro-optic Q-switched Nd:YAG laser and its application in MIR generation
Thermal-compensated high-stability, high-repetition-rate electro-optic Q-switched Nd:YAG laser and its application in MIR generation Open
In this paper, a high-stability, high-pulse-energy 1064 nm electro-optic (EO) Q-switched laser at a repetition rate of 1 kHz has been demonstrated. The thermal lensing of composite Nd:YAG crystal was theoretically analyzed based on the sim…
View article: Efficient 2.8-µm Er-doped all-fiber laser based on a low optical feedback cavity
Efficient 2.8-µm Er-doped all-fiber laser based on a low optical feedback cavity Open
Mid-infrared (mid-IR) fiber lasers have faced significant challenges in achieving all-fiberized structure with high efficiency and high output power due to the limitations of conventional cavity designs. In this paper, we introduce what we…
View article: Polarization-multiplexing terahertz metasurface zone plate for implementing arbitrary spatial coordinate focusing
Polarization-multiplexing terahertz metasurface zone plate for implementing arbitrary spatial coordinate focusing Open
The design of metasurface structures based on the generalized Snell’s law enables diverse functionalities for regulating light fields through abrupt phase changes. However, addressing complex regulatory demands, such as polarization multip…
View article: Dynamics of multimode creeping solitons and soliton explosions in a spatiotemporal mode-locked laser
Dynamics of multimode creeping solitons and soliton explosions in a spatiotemporal mode-locked laser Open
The study of high-dimensional solitons will bring great interest and new opportunities for understanding three-dimensional nonlinear physical phenomena and the design of complex nonlinear systems. The development of spatiotemporal mode-loc…
View article: Single-layer multiplexed metasurfaces with on-demand polarization encoding based on a symmetric Jones matrix
Single-layer multiplexed metasurfaces with on-demand polarization encoding based on a symmetric Jones matrix Open
Waveplates provide precise control over the state of polarization and are essential components in various technologies and scientific disciplines, greatly enhancing the performance of optical systems. Recently, advancements in metasurface …
View article: Cross-Medium Transmission Method Based on 8B/10B Special Position Coding
Cross-Medium Transmission Method Based on 8B/10B Special Position Coding Open
To address limited transmission rates resulting from the laser’s low repetition frequency in cross-medium communication, this study proposed a specialized position coding cross-medium transmission method based on 8B/10B to enhance the tran…
View article: Uncertainty Evaluation of Atmospheric Temperature Retrieval Using Rayleigh Lidar Based on the Optimal Estimation Method
Uncertainty Evaluation of Atmospheric Temperature Retrieval Using Rayleigh Lidar Based on the Optimal Estimation Method Open
View article: Spin-dependent amplitude and phase modulation with multifold interferences via single-layer diatomic all-silicon metasurfaces
Spin-dependent amplitude and phase modulation with multifold interferences via single-layer diatomic all-silicon metasurfaces Open
Diatomic metasurfaces designed for interferometric mechanisms possess significant potential for the multidimensional manipulation of electromagnetic waves, including control over amplitude, phase, frequency, and polarization. Geometric pha…
View article: Design and optimization of all-dielectric focusing metasurface antennas
Design and optimization of all-dielectric focusing metasurface antennas Open
View article: All-fiber magnetic field sensor based on narrow-bandwidth laser internal cavity modulation with coated magnetic fluid
All-fiber magnetic field sensor based on narrow-bandwidth laser internal cavity modulation with coated magnetic fluid Open
In this paper we present a magnetic probe structure based on magneto-fluidic and laser internal cavity modulation. We used a single-mode-no-core-single-mode fiber structure coated by a magnetic fluid as a sensing element, and inserted the …
View article: Research on Pt-Based Film Negative Photoconductivity Photothermal Detector Under Different Wavelength Laser Irradiation
Research on Pt-Based Film Negative Photoconductivity Photothermal Detector Under Different Wavelength Laser Irradiation Open
Platinum (Pt) is a rare and precious metal element with numerous unique properties. These properties have led to the widespread use of Pt in electronic components, thermocouples, and high-temperature devices. In this study, we present the …